Abstract: Disclosed are articles, such as smoke filters, which contain fibers that have complex geometry in combination with tobacco smoke modifying agents such as flavorants. The fibers are preferably made of a polyester such as poly(ethylene terephthalate) and preferably are capable of spontaneously transporting water or n-decane on their surfaces. The articles of the invention result in improved delivery of the tobacco smoke modifying agent to the user.

Abstract: An improved tobacco smoke filter which retains a majority of the tar and nicotine and noxious gases from tobacco smoke. The filter is composed of fibrous filaments having equal quantities of two organic acids or salts of organic acids or polyhydric alcohols dispersed throughout the fibrous filaments.

Abstract: The use of adhesive mixtures containing--per 100 parts by weight water--40 to 120 parts gum arabic, 3 to 80 parts by weight water soluble starch degradation products and/or carboxymethyl starch and/or gelatinized starch and, optionally, typical preservatives in aqueous solution and having a Brookfield (RVT) viscosity at 20.degree. C. in the range from 1,000 to 15,000 and more especially in the range from 1,700 to 5,000 for glueing the longitudinal seam of cigarette tubes by machine, produces excellent glueing strength.

Abstract: Disclosed is a novel tobacco smoke filter material comprising a filter element such as cellulose acetate crimped tow having at least about 1 weight percent of micro acicular crystals of a compound such as sodium carbonate present on the surfaces of the filter element. Also disclosed is a process for preparation of such tobacco smoke filter material comprising immersing the filter element in a solution of the compound capable of forming the micro acicular crystals, followed by removing the filter element from the solution and removing residual liquid, thereby forming the novel tobacco smoke filter material.

Abstract: Disclosed is a novel process of preparing tobacco smoke filter material, wherein an acidic compound such as citric acid is dissolved in a cellulose acetate spinning solution prior to spinning the filaments of the filter material.

Abstract: Disclosed is a novel process of preparing tobacco smoke filter material, wherein an acidic compound such as citric acid is dissolved in a cellulose acetate spinning solution (dope) prior to spinning the filaments of the filter material.

Abstract: The invention consists of a method for absorbing nitrogen oxide and carbon monoxide from tobacco smoke. It includes a base made of acetate, cellulose and acetate-cellulose fibers. The base is impregnated with an absorbing agent, and the absorbing agent may include a complex compound of ferrous iron and thiol-containing low-molecular ligands. A method for impregnating the base of the filter with the absorbing agent comprises immersing the base in an aqueous suspension of a complex compound of ferrous iron and thiol-containing low-molecular ligands and then drying it; or, treating the base with an aqueous solution of a thiol-containing low-molecular ligand, treating the resulting compound with an aqueous solution of ferrous salts and then drying the resulting compound. A composition for absorbing nitrogen oxide and carbon monoxide from smoke comprises a complex compound of ferrous iron and thiol-containing low-molecular ligands.

Abstract: The invention relates to a novel, highly efficient tobacco smoke filter provided with mechanically (fibrous) and/or adsorptively filtering materials as well as chemosorptively filtering components, which comprises a synergistic composition containing at least one of a compound having a high nucleophilic additivity, capable of chemically reacting and stable adduct forming with excited and ground-level aldehydes not filtered out by the mechanically and/or adsorptively filtering materials; and at least one of a compound containing ##STR1## enediol structural moieties, wherein the enediol type compound or its combination suitably amount to at least 50% by weight of the other chemosorptive components and 40 to 300% by weight of the adsorptively filtering materials.

Abstract: Fibers of tobacco smoke filters which have been impregnated with dicarboxylic or polycarboxylic acids or anhydrides thereof can be obtained by dissolving anhydrides of dicarboxylic or polycarboxylic acids in volatile or physiologically acceptable organic solvents and applying them to the fibers and, if appropriate, hydrolyzing them with water.

Abstract: Method for controlling delivery of by-products found in cigarette smoke by utilizing a cigarette filter element comprising one or more substrates treated with an effective amount of at least one of (A) zinc chloride, ferrous bromide, calcium bromide, lithium bromide, zinc thiocyanate, sarcosine hydrochloride, manganese sulfate, manganese acetate, magnesium chloride and magnesium acetate; alone or combined with (B) glyceryl triacetate; plus corresponding treated filter element(s) and cigarette(s) utilizing such filter elements(s).

Abstract: The ventilated filter cigarettes of the present invention have an American-blend flavor. The cigarettes comprise Virginia tobacco with main stream smoke have a condensate/nicotine ratio of 5:1 to 9:1, a condensate value of 10 mg maximum, a pH-value greater than 6.0, and a pollutant index of less than 35. Specific features of this invention include: a filling tobacco comprising Virginia tobacco with a high nicotine content of 2 to 3.5% by weight; a packing density is 150 to 250 mg/cm.sup.3 ; a cigarette paper having an air permeability of 3 to 20 CORESTA units, in which the cigarette rod is in the hardness/haptic range of 1.9 to 2.5 mm ET; a fine-titre cellulose acetate filter having no flavor-modifying additives and having an individual titre of 1.3 to 2.5 denier, and a total titre of 40,000 to 55,000 denier resulting in a draw resistance of 95 to 160 daPa for a length of 21 mm and a diameter of 7.

Abstract: A nonwoven fibrous web material that contains cellulose ester fibers, cellulose ester fibrets and a minor amount of activated fusible fibers uniformly dispersed throughout is particularly well suited as a filter media. The activated fusible fibers are effective for retaining within the filter web any particulate material resulting from corrugation without adversely affecting the filtration efficiency of the cellulose ester fibers and fibrets. Alternatively, the fibrous web material may include an effective amount of natural cellulosic fibers.

Abstract: A process for improving selective filter retention and pass through properties of cigarette filter elements by treating with polyethyleneimine modified to a predetermined pH range with one or more indicated water soluble organic acids, as a filter modifier composition, and the corresponding filter element and cigarette.

Abstract: Disclosed is a novel tobacco smoke filter material comprising a filter element such as cellulose acetate crimped tow having at least about 1 weight percent of micro acicular crystals of a compound such as sodium carbonate present on the surfaces of the filter element. Also disclosed is a process for preparation of such tobacco smoke filter material.

Abstract: A method for controlling nicotine delivery through a cigarette filter relative to total particulate pass-through concentration, and the corresponding filter utilizing, as a filter modifier component, at least one water-soluble metal salt of a weak acid, the choice and amount of salt within the filter favoring an alkaline pH exceeding about pH 8, the amount of alkalinity being correlated to the desired amount of nicotine pass-through while corresponding nicotine filter retention properties are keyed to the presence and concentration of a water soluble salt of a strong acid within the filter.

Abstract: A ventilated cigarette having a filter consisting of filtering material wrapped in an outer cover strip having a number of radial ventilating holes; at least the portion of the aforementioned filtering material communicating externally through the ventilating holes and through the open end of the filter consisting of material which becomes increasingly permeable by air as its steam content and/or temperature increases.

Abstract: Skinless shaped articles having increased specific surface area and based on cellulose esters, including both solid and hollow fibers, can be produced with at least one surface having a striated or fibrous appearance and a cellular interior structure by extruding a spinning solution comprising a cellulose ester and a solvent therefor directly into an aqueous bath, wherein the residual content of solvent in the bath is maintained at a concentration below a critical level, preferably less than about 10 weight percent.

Abstract: Ventilated cigarettes are made with a tip zone consisting of tobacco or a filter or a hollow tip, which contains, in the wrapper or wall, at least one ventilation zone. In the tip zone or between it and the tobacco roll, or in the latter, there is placed an element which consists of polymeric, not crimped spun fibers and/or filaments, which may have the shape of a disk. This element is arranged in such a manner that it is located behind the ventilation zone, when seen from the end of the tip zone facing the mouth. The spun fibers and filaments have, respectively, a diameter between 0.1 and 20 .mu.m and lie generally transverse to the flow of the tobacco smoke.

Abstract: Tobacco smoke filters are disclosed which are useful for manufacturing filter cigarettes and which are formed from a continuous multifilament filter tow that is treated with a smoke-modifying agent during the filter manufacturing process to give a discrete elongated zone of filaments treated with the smoke-modifying agent.

Abstract: A continuous rod of a product such as a cigarette filter material is coated with a treating liquid by being passed axially through a cylindrical applicator zone comprising a permeable cylindrical wall, the cylindrical wall being concentrically enclosed within a reservoir and manifold zone connected to a source of liquid. The feed supply for the liquid additive can be pressurized and/or heated, so that application of the additive can be in either liquid or vapor form. The process and apparatus of this invention may be used alone or in conjunction with prior art homogeneous applicators and processes.When used to apply a plasticizer to a rod of continuous filament tow, e.g. for use in producing cigarette filters, annular regions of varying concentrations of the plasticizer are produced in the rod. A relatively dense region of plasticized fiber can be produced on the outside of the filter. Filter rods having wrapping paper uniformly adhered about the periphery of the rod can be produced.

Abstract: Disclosed are tobacco smoke filtering materials for selectively removing deleterious material from tobacco smoke without at the same time removing desirable smoke vapors which contribute to aroma and taste. The filtering materials comprise a fibrous article, the fibers of which have a coating on the surfaces thereof comprising a compound of the formula ##STR1## wherein R.sub.1 is the residue of a straight chain fatty acid having 8-22 carbon atoms and R.sub.2 is OH or ##STR2## wherein Ac is an acetyl group.

Abstract: Fibers of narrow cross section for use in tobacco filters composed of cellulose acetate fibers in which the fiber cross section is in a rectangular configuration and the longer/shorter diameter ratio thereof is greater than 5.5.Filters of high filtering performance can be manufactured with a relatively small fiber filling rate.

Abstract: A tobacco smoke filter for use suitable in cigarettes comprising cellulose acetate filaments which have a C-shaped cross section. Such filter shows a good filtration performance with less impairment of the tobacco taste or flavor.

Abstract: A process is provided for producing cigarette filters which exhibit desired adhesion properties between the filter fibers, and which may be subjected to a substantially broader operating range during a temperature melt fusion step. A crystalline propylene polymer and a second crystalline polymer are mixed together, and the blend is extruded into fibers which are then heated to a temperature above the original melting point of the second crystalline polymer and below the original melting point of the crystalline propylene polymer. The fibers are twisted and/or crimped to effectuate desired adhesion between the fibers and are subsequently formed into filter rods which display greatly increased cohesiveness.

Abstract: A method of sizing thermoplastic foamed cigarette filter rods and apparatus therefore. The apparatus comprises a rotating drum member having a plurality of stationary heated block members mounted about the periphery thereof. The block members are positioned such that a specific gap is created through which the thermoplastic polymeric filter rods are rolled and compressed to a uniform circumference.

Abstract: Process for producing a filtering structure, in particular for cigarette filters from a fibrous mass comprising a homogeneous mixture of fibres of different types. Some of the fibres are necessarily thermofusible synthetic fibres having a low melting point and adhesive properties in the molten state, and the others are absorbent with respect to harmful products of tobacco smoke and stable at the melting temperature of the thermofusible fibres. The fibrous mixture is shaped into a cylindrical rod which is in state which is not yet coherent but homogeneous and comprises fibrous networks which are closely imbricated relative to each other.

Abstract: This invention relates to a material for tobacco smoke filters. This material comprises cellulose fibers containing amino groups and is obtainable by reacting certain amino compounds with certain reactive cellulose derivatives. Preferably, the filter material of the present invention contains from 70 .mu.moles to 2 mmoles of amino groups per gram of filter material.

Abstract: A smoke-filter rod comprises a body of rod form consisting or having as at least major constituent a thermoplastics cellulose acetate or polypropylene smoke-filtration material, preferably of a fibrous or filamentary nature, and wrapped in a plugwrap comprising at least 50%, suitably at least 90%, by weight of fibres or filaments of, respectively, cellulose acetate or polypropylene material of substantially the same chemical identity as said major constituent of the filtration material, said plugwrap being bonded to said body and having a permeability for air of not less than 10,000 Coresta units. The bonding is by an agent which is a bonding agent for the material of said plugwrap and said filtration material, suitably triacetin in the case of cellulose acetate. Portions of such filter rod can be subjected to a hot-shaping process.

Abstract: A rod-form body of smoke filtration material, preferably fibrous or filamentary, is wrapped in a fibrous or filamentary plugwrap comprising at least 50% by weight of fibres or filaments of thermoplastics material. The plugwrap may have premeability for air of not less than 10,000 Coresta units. The majority, suitably at least 80% by weight, of the material of the rod-form body is a material other than the said themoplastics material of the plugwrap. Thus the smoke-filtration material may comprise crimped polypropylene tow and the plugwrap be composed substantially wholly of fibrous cellulose acetate or conversely. Portions of such filter rod may be subjected to a hot-shaping process to provide grooved filter elements.

Abstract: A method for manufacturing cigarette filters which have a well-stabilized shape in which acetate fibrous tows impregnated with carboxylic acid ester of polyol are formed into a predetermined shape, uniformly impregnated with water, and irradiated with microwave energy. Water is used during the application of microwave energy to enhance the absorption of microwave energy and hence heating of the filter. This causes the carboxylic acid ester of polyol to very rapidly disperse causing it to permeate into the acetate fiber to rapidly complete the stabilization and solidification of the filter.

Abstract: A cigarette filter composed of a bundle of cellulose acetate filaments having at least two different filament denier sizes randomly distributed in the direction perpendicular to the longitudinal axis of said filter.

Abstract: A non-woven cellulose ester fibrous filter sheet material comprising cellulose ester staple fibers and cellulose ester fibrets which exhibits improved filtration properties and the method of its preparation.