Abstract: The invention relates to a filter or filter element with a substantially cylindrical filter body, which contains, in particular, at least two different additives, the additives being located in at least two zones which are arranged one after the other in the longitudinal-axial direction of the filter body and/or in at least two zones, more particularly layers, which at least in sections lie one above the other in the radial direction of the filter body. The invention also relates to a filter or filter element for tobacco smoke, comprising a substantially cylindrical filter body that can be made from a material which in its initial state is flat, more particularly endlessly curled filaments, paper, fibrous webbing, textile material, non-woven and the like, the filter body comprising at least two zones which are arranged one after the other in the longitudinal-axial direction of the filter body, a tobacco-end zone containing an additive and a mouth-end zone being free from additive.

Abstract: A tobacco smoking filter is disclosed, with adjunets on the surface in the form of fibres filaments or films and whereby the drawing resistance of the tobacco smoking filter and the mass of the adjuncts in the tobacco smoking filter meet the following equation (I) Mad/?p>1 mg/daPA (I), where ?p is the drawing resistance [daPA], applied as a value calculated with a 7.8 mm filter diameter and Mad [mg] is the mass of the adjuncts. The tobacco smoking filter comprises channel structures and the filer material is provided as a planar material. Said tobacco smoking filter has a low draw resistance on smoking with a particularly good filtration effect and is relatively simple to produce.

Abstract: Abstract of the Disclosure The invention relates to a filter tow made from crimped endless cellulose acetate filaments, whereby the filaments form at least two connected fibre bundles with the same filament titre of at least 600 filaments. The filament titres differ from bundle to bundle by at least 1 dtex Furthermore a filter tow is disclosed with a crimp ratio of more than 40%, said filaments comprising at least 22 crimp turns per filament length.

Abstract: The invention relates to a device for producing cigarette filters, which comprises a conditioning section (AF) for conditioning the supplied filter tows, a formatting device (F) for producing a wrapped filter strand, a dosing device integrated into the conditioning section for dosing a softener. The device further comprises sensors that detect the mass flow of filter tow material M1 and sensors that detect the sum of the mass flow from filter tow material and softener compound M2. A measuring and regulation unit is coupled with the sensors for measuring the mass flows (M1 and M2) in such a manner that both the filter material and the softener compound can be measured and regulated independently.

Abstract: The invention relates to a filter tow made from crimped endless cellulose acetate filaments, whereby the filaments form at least two connected fibre bundles with the same filament titre of at least 600 filaments. The filament titres differ from bundle to bundle by at least 1 dtex Furthermore a filter tow is disclosed with a crimp ratio of more than 40%, said filaments comprising at least 22 crimp turns per filament length.

Abstract: The invention relates to a high performance cigarette filter on the basis of cellulose ester fibers or filaments which can be mechanically disintegrated. The inventive high-performance cigarette filter is characterized in that a) the fiber weight (or filament weight)/draw resistance ratio S based on the filament titer is greater than approximately 0.7, the S value being calculated according to the formula S=(mA/&Dgr;P7.8/dpf[10 m/daPA], wherein mA refers to the fiber weight, &Dgr;P refers to the draw resistance and dpf represents the filament titer and for the draw resistance the value calculated for a diameter of 7.8 mm is inserted, b) the residual crimping value of the filter material does not exceed the value 1.45, c) the fiber weight amounts to maximally 10 mg/mm of the filter length, and d) the hardness of the cigarette filter is higher than approximately 90% filtrona hardness.

Abstract: The disclosure relates to a melt-blown non-woven fabric based on cellulose esters, with fibers of mean diameter less than about 10 microns. The fabric contains 0-10 wt. % extractable softener, has a reflection factor determined according to DIN 53 145 Part I (1992) of more than 60% and the cellulose ester has a degree of substitution DS of about 1.5-3.0. The softener is preferably water-extractable. A melt-blown non-woven fabric is produced with the cellulose ester as follows: a cellulose ester, cellulose acetate, with a DS of about 1.5-3.0, in particular 1.7-2.7, is mixed with softener in a weight ratio of about 2:1 to 1:4 and simultaneously heated and melted. The mixture of softener and cellulose ester has a melting index MFI (210/2.16) according to DIN 53 735 of about 400 to 5 g/10 min., in particular 300 to 50 g/10 min. The melt is worked in a melt-blown spinning device into a melt-blown non-woven fabric and the softener is then extracted with a softener solvent to leave a proportion of 0-10 wt. %.

Abstract: A description is given of a filter cigarette, whose filtera) contains fibrous filter material,b) contains an additive with an antimutagenic action on the cigarette smoke in a quantity of less than 15 wt. %, based on the fiber weight of the filter andc) on smoking a similar unventilated filter cigarette, but not containing additive, has a nicotine retention R.sub.N (in %) (determined according to CORESTA recommended method No. 9) satisfying the following formula:R.sub.N .gtoreq.100*(1-D)in which:D=exp(A*B+C),withA=21 mm-filter length (mm) for filter lengths.ltoreq.25 mm orA=-4 mm for filter lengths>25 mm,B=9.3*10.sup.-3 (1/mm) andC=-(d.sup.4 *.DELTA.p*K+L)with d=filter diameter (mm),.DELTA.p=draw resistance of filter (mm hydraulic pressure),K=1.0228*10.sup.-6 (1/(mm.sup.4 *mm hydraulic pressure)) andL=0.2334.

Abstract: A method of producing at least one filter skein for cigarettes and other smokable rod-shaped articles, from at least one filter tow strip comprises the steps of: (a) drawing at least one filter tow strip, from at least one supply, (b) feeding the at least one filter tow strip to a treatment in a treatment unit; (b1) at the beginning of the treatment unit, subjecting at least one filter strip to a brake force to adjust at least the quantity to be processed, the brake force being set automatically, and (b2) afterwards, stretching and fluffing the filter tow strip(s) by the use of two pairs of rolls, wherein the surface of one roll of at least one pair of the two pairs is smooth and the other roll is profiled over its entire surface, (c) after the treatment, collecting the treated filter tow strip from step (b) in a formating unit to at least one round skein with an enveloping material to form at least one continuous, wrapped filter skein, (d) detecting and measuring a characteristic value of the produced filter

Abstract: Structures are formed from cellulose acetate in which an additive is present or on this surface the additive consisting of a nitrogenous organic compound which by degradation by microorganisms forms basic decomposition products, in particular ammonia, and/or--basic--compounds having an NH group or NH groups and/or an NH.sub.2 group or NH.sub.2 groups. The structures may have the form of filaments, staple fibers, films, foils, sheets or other objects. The structures in the form of filaments and/or staple fibers are used for the manufacture of filter tows. The filter tow of this kind is described. The filter tow is for the manufacture of a tobacco smoke filter element, and such a tobacco smoke filter element is described.

Abstract: A method for producing at least one fiber skein for the production of filters for cigarettes and for other smokable rod-shaped articles, comprises the steps of drawing from a supply at least one filter tow strip, supplying the drawn fiber strip to a subsequent treatment, in which the fiber strip is stretched and fluffed, then the treated fiber strip is collected in a formating unit to a fiber skein which is finally provided with an enveloping material, to form a continuous, wrapped fiber skein. The fiber strip of strips are exposed at the beginning of the treatment to a brake force, to adjust at least the quantity to be processed of the fiber strip of strips, the brake force being set automatically.

Abstract: A filter tow of cellulose acetate filaments and/or cellulose acetate staple fibers, has at least the surface of the filaments and staple fibers consisting of a cellulose acetate having an acetyl number of less than 53%, preferably less than 49%. The method for the manufacture of the filter tow comprises the spinning of cellulose acetate filaments from a solution of cellulose acetate having an acetyl number of at least 53% in acetone, if necessary, cutting the filaments into staple fibers, and combining the filaments and/or staple fibers to a filter tow, the filaments or staple fibers being hydrolyzed so that at least the cellulose acetate at the surface of the filaments and staple fibers has an acetyl number of less than 53%, preferably less than 49%. The invention involves also a tobacco smoke filter element made from the filter tow, as well as a method for the manufacture of the tobacco smoke filter element.

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.