EP1921934A2 - Filtre ou element filtrant pour la fumee du tabac, cigarette pourvue d'un tel filtre ou element filtrant et procede de fabrication d'un tel filtre ou element filtrant - Google Patents

Filtre ou element filtrant pour la fumee du tabac, cigarette pourvue d'un tel filtre ou element filtrant et procede de fabrication d'un tel filtre ou element filtrant

Info

Publication number
EP1921934A2
EP1921934A2 EP06776743A EP06776743A EP1921934A2 EP 1921934 A2 EP1921934 A2 EP 1921934A2 EP 06776743 A EP06776743 A EP 06776743A EP 06776743 A EP06776743 A EP 06776743A EP 1921934 A2 EP1921934 A2 EP 1921934A2
Authority
EP
European Patent Office
Prior art keywords
filter
additives
additive
zones
filter body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06776743A
Other languages
German (de)
English (en)
Inventor
Günter Maurer
Eberhard Teufel
Paul Rustemeyer
Eckart SCHÜTZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cerdia Produktions GmbH
Original Assignee
Rhodia Acetow GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102005042099A external-priority patent/DE102005042099A1/de
Priority claimed from DE102005060972A external-priority patent/DE102005060972A1/de
Application filed by Rhodia Acetow GmbH filed Critical Rhodia Acetow GmbH
Publication of EP1921934A2 publication Critical patent/EP1921934A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/24—Treatment of tobacco products or tobacco substitutes by extraction; Tobacco extracts
    • A24B15/241—Extraction of specific substances
    • A24B15/245—Nitrosamines
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
    • A24D3/163—Carbon

Definitions

  • Filter or filter element for tobacco smoke Cigarette with such a filter or filter element and method for producing such a filter or filter element
  • the invention relates to a filter or a filter element for tobacco smoke with a substantially cylindrical filter body.
  • Tobacco smoke filters are used in filter cigarettes to at least partially remove the combustion products produced upon burning of the tobacco from the smoke before it is inhaled.
  • an additive in particular particulate activated carbon. This can be done in different ways, depending on the particular type of filter used.
  • Spatial filters are made of filter tow formed from endless stuffer box crimped filaments.
  • a solution of about 30% cellulose-2,5-acetate in acetone is forced through spinnerets, the acetone evaporated in a spinning shaft, a plurality of filaments combined into a band and this then stauchschgeköselt.
  • the product is then dried and pressed into bales.
  • the filter tow is the BaI len and processed on a filter rod machine to filter rods.
  • the filter tow is stretched in a stretching device, provided with an additive used for bonding the filaments, compacted after formation of a so-called Lunte cross-axial, wrapped with paper and cut on the Endlä ⁇ ge the filter rods.
  • activated charcoal granules may be embedded in the Filame ⁇ tnetzwerk or finely divided activated carbon occupy the individual filaments. This can be done, for example, by sprinkling activated carbon granules or by applying the activated carbon from a slurry in an aqueous phase, a volatile organic carrier or a plasticizer liquid. In this process, the particulate activated carbon in the entire filter volume is distributed more or less evenly.
  • the output material used is a sheet, such as e.g. Paper, spunbond, textile fabric or nonwovens.
  • the sheet-like starting material rolled up onto a reel is unrolled, shaped into a rod-shaped product and compacted transversely-axially, wrapped in paper and cut to the final length of the filter rods.
  • the sheet may be crimped by a creping device prior to forming the rod parallel to the direction of travel, thereby reducing the material density and affecting the draft of the filter.
  • the activated carbon is introduced into the filter by doping the sheet-like starting material, in particular the paper, with activated carbon.
  • Such doped paper filters include small particle size activated carbons which are bonded to the paper in the papermaking process. As a result of the process, the activated carbon is distributed over the entire filter volume.
  • Stabilizers These additives have no retention effect on the smoke stop materials.
  • all additives so both the activated carbon and the other additives provided inside the fibers, filaments and films are evenly distributed over the entire filter volume.
  • US 3,311,519 discloses a spatial filter made of classic filter tow. Activated carbon is added to this spatial filter, the activated carbon being applied in strips to the stretched filter tow material.
  • the above-described filters have the disadvantage that the amount of activated carbon which can be introduced into the filter body is limited by the filter volume as well as by the draft resistance still accepted by the smoker, which excessively increases when the amount of activated carbon is too high. As a result, the determined by the activated carbon Rete ⁇ tions Basil the tobacco filter is limited.
  • the invention is therefore based on the object to provide a filter or a filter element and a cigarette with such a filter or filter element, which allow an improved filtration of combustion products. Furthermore, a method for producing such a filter or filter element is to be created.
  • this object is achieved by the subject matter of claims 1 and 13 and with respect to the cigarette by the subject matter of claim 14 alternatively.
  • the object is achieved by the subject matter of claim 15.
  • the invention is based essentially on the idea of providing a filter or a filter element for tobacco smoke with a substantially cylindrical filter body, which in particular has at least two different additives.
  • the additives are arranged in at least two zones arranged downstream of one another in the longitudinal-axial direction of the filter body and / or in at least two zones, in particular layers, arranged one above the other in the radial direction of the filter body.
  • the invention also provides a filter or filter element for tobacco smoke with a substantially cylindrical filter body, producible from a flat material in the initial state, in particular endlessly crimped filaments, paper, nonwoven, textile fabric, non-wovens and the like, characterized in that the filter body has at least two zones arranged downstream of one another in the longitudinal-axial direction of the filter body, a tobacco-side zone having an additive and an orifice-side zone being free of additive.
  • the resulting spatial separation of the various additives wherein in the border zones of the zones a certain mixing of the additives is not excluded, creating the prerequisite that various additives can be combined with each other, which increase the overall filtration performance of the filter.
  • This can be achieved, for example, by a suitable choice of additives which, in combination, enhance the effectiveness of the individual additives.
  • the invention provides the opportunity to expand the range of different combustion products that can be removed by selective retention of the various additives from the smoke.
  • the invention further provides the prerequisite that various additives can be used, of which an additive for the other additives or a protective function.
  • an upstream additive filters out the ingredients harmful to the effectiveness of the subsequent additive from the smoke before they come into contact with the subsequent additive.
  • the invention provides that the various additives are spatially separated and in at least two in the longitudinal axial direction of the filter body mutually downstream zones and / or in at least two in the radial direction of the filter body at least partially superimposed zones.
  • the zonewise arrangement of the various additives has the further advantage that various additives can be used which would enter into an undesirable chemical reaction in homogeneous mixture with each other.
  • various additives can unfold their effect freely, without these additives adversely affecting one another.
  • Retention performance is significantly increased, so that in surface filters already be knew advantages, in particular the comparatively low draw resistance and the good biodegradability come particularly to fruition.
  • a directly mouth-side zone is substantially free of additives.
  • At least one additive comprises a means for enhancing the effectiveness of at least one further additive.
  • At least one additive comprises a sorbent, in particular an adsorbent or an absorbent, whereby the retention of smoke constituents can be effectively achieved.
  • the sorbent may comprise activated carbon, a polymer resin, in particular phenolic resin or metal oxides, metal hydroxides and / or metal oxide hydrates, in particular those of aluminum, silicon, titanium and / or magnesium.
  • At least one additive comprises a catalyst, in particular for the oxidation of carbon monoxide, wherein the catalyst is arranged either in the flow direction downstream of the sorbent or below the sorbent.
  • This arrangement of the catalyst causes smoke ingredients that have been poisoning the catalyst to pass from the smoke the sorbent upstream of the catalyst is filtered out. This effect is also to be expected if the additives are arranged one above the other.
  • the overall filtration performance of the filter can be further improved by including at least one additive comprising an electrophilic reagent having a selective retention effect on amines, in particular on primary or secondary amines.
  • the electrophilic reagent having a selective retention effect together with the at least one other additive provided according to the invention, means that a comparatively large spectrum of different smoke constituents can be filtered out of the smoke.
  • At least one additive may comprise a nucleophilic reagent having a selective retention effect on aldehydes and ketones, in particular acetaldehyde, protonaldehyde, butyraidehyde or acetone propionaldehyde.
  • a nucleophilic reagent having a selective retention effect on aldehydes and ketones in particular acetaldehyde, protonaldehyde, butyraidehyde or acetone propionaldehyde.
  • the combination of the nucleophilic reagent with the electrophilic reagent and the concomitant combination of the various selective retention effects means that a particularly large number of different smoke constituents are filtered out of the smoke.
  • the combination of the electrophilic reagent with the nucleophilic reagent is achieved by the inventive arrangement of the two additives in different spatially separated zones, which are provided in the longitudinal-axial direction and / or in the radial direction of the cylindrical filter body, whereby a chemical reaction between the substances is avoided.
  • the filter or the filter element for tobacco smoke has a substantially cylindrical filter body, which consists of a flat in the initial state material, in particular endlessly crimped filaments, paper, nonwoven, textile fabric, non-wovens and the like , can be produced.
  • the filter body also has at least two zones arranged downstream of one another in the longitudinal-axial direction of the filter body, wherein a tobacco-side zone has an additive and an orifice-side zone is free of additive.
  • the filter according to the independent claim 13 is a so-called area filter which is produced from a planar starting material. Due to the use of the planar starting material, a surface filter differs from a spatial filter in terms of the different filter structure. In particular, for channel filters whose channel structure is characteristic, which results from the pleating of the planar starting material and which is not present in spatial filters.
  • the filter according to the invention or the filter element according to the invention according to subordinate claim 13 has the advantage that the production costs can be reduced compared to commonly used double filters, since the surface filter according to the invention is a monofilter. In addition, the visible face of the filter appears white, as is predominantly demanded by the consumer.
  • the untreated or additive-free zone further ensures that, when the additive-free zone on the mouth side of the filter is arranged, the additive provided on the tobacco side is largely not removed from the filter and inhaled.
  • the inventive method is based essentially on the fact that the additives are applied to a flat starting material for the filter body in substantially mutually parallel strips and / or in layers one above the other.
  • the strip-wise application of the additives and / or the layered application of the additives to the sheet-like filter starting material creates the prerequisite for the zone or layered arrangement of the additives, after the sheet-like starting material is transaxially formed and compressed transversely to a filter rod.
  • a preferred embodiment of the method according to the invention is based on applying one of the additives in a first strip and another of the additives in a second and third strip arranged on both longitudinal sides of the first strip and each narrower than the first strip.
  • This arrangement of the various additives enables a particularly efficient production of the filter, since the filter can be cut to its final length in the region of the broader first strip, thereby producing with one cut two filter end products, since on both sides of the wider first strip those from the other Additive formed narrower second and third strips are provided.
  • the second strip with the one from the first strip resulting strip associated with a filter.
  • the second strip with the other strip resulting from the first strip is assigned to another filter.
  • the additives can be applied in solution or in dispersion, the solvent or the dispersion medium then being evaporated. This allows a particularly simple spraying or printing of the additives on the sheet-like starting material.
  • 1a shows a flat filter material as a starting material for the production of a surface filter, which is printed alternately with an additive
  • FIG. 1b shows a filter rod which is produced from the printed flat filter material according to FIG. 1a;
  • FIG. 1 c shows a cigarette with a filter produced from the filter rod according to FIG. 1 b;
  • FIG. 2a shows a flat filter material as starting material for the production of a filter rod which is printed alternately with two different additives
  • FIG. 2b shows a filter rod which is made of the printed sheet-like filter material according to Fig. 2a, wherein the points at which the filter rod is cut to length, are located;
  • FIG. 2c shows a cigarette with a filter produced from the filter rod according to FIG. 2b;
  • 3a shows a sheet-like filter material as starting material for a filter rod which is printed alternately with two different additives, wherein the two additives are present in strips arranged parallel to each other;
  • 3b shows a Fiiterstab, from the printed flat filter material of FIG.
  • FIG. 3c shows a cigarette with a filter produced from the filter rod according to FIG. 3b;
  • Fig. 4a is a sheet-like filter material as a starting material for a filter rod, which is printed alternately with two different additives, wherein the
  • Additives are present in strips of different widths
  • Fig. 4b shows a filter rod made from the printed sheet filter material of Fig. 4a;
  • Fig. 4c shows a cigarette with a filter made from the filter rod of Fig. 4b;
  • Fig. 5 shows the schematic structure of a plant for the production of filter rods.
  • FIGS. 1 a, 1 b and 1 c show the starting product present in the various stages of cigarette production, ie the flat filter material, the intermediate product, ie the filter rod, and the end product, ie the cigarette.
  • the exemplary embodiment explained with reference to FIGS. 1 a, 1 b, 1 c is associated with the filter or filter element according to the independent claim 13, in which a surface filter has at least two zones arranged downstream of one another in the longitudinal-axial direction of the filter body, wherein in a tobacco-side zone Additive is present and a mouth-side zone is free of additive.
  • a flat filter material is used as the starting material, as shown in Fig. Ia.
  • This flat filter material can be produced, for example, from endlessly crimped filaments, paper, fleece, textile fabric, non-wovens or similar fabrics.
  • the flat filter material 2 is continued in the longitudinal direction in the form of a continuous material web, as indicated in Fig. Ia.
  • the additive 3 is printed in strips on the flat filter material 2, wherein the individual strips 3 are arranged substantially parallel to each other. Between the strips 3 in each case unprinted strips 6 are arranged, the width of which substantially corresponds to the width of the strips 3. This results in an alternating arrangement of printed and unprinted areas and thus an alternating arrangement of additive-provided and additive-free strips 3, 6.
  • the dimensions shown in FIG. 1 a are to be understood schematically.
  • the thickness of the strips 3 is thinner than shown in Fig. Ia.
  • the additive lies in the region of the zone 3 on the flat filter material, i. on its surface in front.
  • the additive can also penetrate into the filter material 2 or impregnate the filter material 2 zone by zone or in strips.
  • the two zones do not have to be of equal width, as shown in the figure. Both the absolute width and the width ratios of the zones are not critically limited.
  • the printed zone does not have to extend in the transverse axial direction over the entire width of the flat filter material.
  • a sorbent can be used which comprises activated carbon, silicon dioxide or a polymer resin.
  • a CO oxidation catalyst can also be used as an additive.
  • the printed sheet-like filter material according to FIG. 1a is processed in a filter rod machine by folding or rolling in a manner known per se to form the filter rod 1a shown in FIG. 1b.
  • Fig. Ib only a section of the filter rod Ia is shown.
  • the strips 3 of additive printed on the flat filter material 2 form after the processing of the filter material 2 to that shown in FIG Filter rod Ia alternately arranged zones.
  • the various zones 3, 6 are arranged downstream of one another in the longitudinal-axial direction of the filter rod 1 a, with additive-free zones 6 and additive-containing zones 3 alternating.
  • the filter rod 1a according to FIG. 1b thus obtained is cut at the points shown in FIG. 1b for the production of filters or filter elements.
  • the resulting filter 1 is shown in Fig. Ic and has an additive-free zone 6 and an additional zone 3.
  • the filter 1 is, as shown in Fig. Ic, used together with a cigarette 5, wherein the additive-containing zone 3 are arranged on the tobacco side of the cigarette and the additive-free zone 6 on the mouth side.
  • the additive-containing zone 3 i.
  • the present in zone 3 activated carbon resulting from the smoking smoke components back.
  • the mouth-side adjunct-free zone 6 prevents the additive present in zone 3 from exiting the filter 1 during smoking and being inhaled.
  • the additive-free Zone.6 provides for a white face of the filter 1, as desired by the consumer.
  • FIGS. 2a, 2b, 2c relate to the filter or the filter element according to claim 1.
  • the various stages of the method are illustrated with reference to the starting product, the intermediate product and the end product.
  • Fig. 2a it is shown that the sheet-like filter material 2 is printed with different additives, in particular with two different additives.
  • the additives are arranged on the flat filter material 2 so that they are substantially spatially separated.
  • the dimensions shown, in particular the thickness dimensions are to be understood schematically.
  • the thus prepared filter material 2 is processed to the filter rod shown in Fig. 2b, which, cut to length, forms the filter 1, as shown in Fig. 2c.
  • the filter 1 thus produced thus comprises two spatially separated additives, which are in the radial direction of the filter body superimposed zones 3, 4, or layers present.
  • the radially inwardly arranged zone 3 is covered by the radially outer zone 4.
  • the additive-containing zones 3, 4 are, as shown in Fig. 2c, in the cigarette on the tobacco side and the additive-free zone 6 mund lake arranged.
  • Fig. 3a is a flat filter material, which serves as a starting material for the filter 1 shown in Fig. 3c.
  • the flat filter material 2 according to FIG. 3a is provided with a plurality of different additives, in particular with two different additives, which are applied in strips to the filter material 2 transversely to its longitudinal extension, in particular being printed.
  • the resulting strip-wise zones are arranged parallel to one another and directly adjoin one another.
  • the spatial separation of the additives does not take place by superimposing, but by juxtaposing the zones 3, 4.
  • Width of the strips or zones 3, 4 on the sheet-like starting material 2 twice is as large as the width of the zones 3, 4 of the filter 1, which is obtained by appropriately cutting the length of the filter rod 1, as shown in Fig. 3b.
  • the sections of the alternating zones 3, 4 in turn alternate with the additive-free zones 6, as shown in Fig. 4a.
  • the thus processed surface material 2 is then further processed into a filter rod, as shown in Fig. 4b.
  • the filter rod 1a according to FIG. 4b is cut to produce the filter 1 respectively in the additive-free zones 6 and in the wide additive-containing zones 4, wherein the additive-free zones 6 are also twice as wide as the additive-containing zones 3 from the other additive - Material.
  • a filter 1 consisting of three different, spatially separated zones is produced in a particularly efficient manner, which is shown in FIG. 4c.
  • This filter 1 comprises a mouth-side arranged additive-free zone 6, upstream of an additive, in the flow direction of the smoke, an additive-containing zone 3, which in turn is a further zone 4 of another additive, also upstream in the flow direction of the smoke.
  • the filters shown in FIGS. 2c, 3c, 4c and the arrangement of the zones of these filters can be combined with one another.
  • it is possible to arrange three different additives such that two additives are arranged in strip-like layers one above the other on the starting material, the third additive being arranged in a further strip parallel to the strip consisting of two layers.
  • a filter produced from a starting material prepared in this way comprises a zone with a partial zone arranged radially on the inside and a partial zone arranged radially on the outside.
  • In the longitudinal-axial direction of the filter of this zone of two spatially separated additives is a further zone with the third additive upstream or downstream.
  • This filter can also be combined with a non-additved mouth-side zone.
  • the different additives may be chosen such that an additive performs a protective function for a second additive.
  • the tobacco-side zone can be provided with activated carbon and the downstream zone can be designed as a CO oxidation catalyst.
  • Another downstream in the flow direction zone may be formed on the mouth side as an additive-free zone.
  • the activated carbon retains smoke constituents, which are without this upstream zone would poison the CO oxidation catalyst.
  • the catalyst works more effectively.
  • the additives are not arranged downstream in lä ⁇ gs-axial direction of the filter 1, but are provided in radially superimposed layers.
  • a filter tow of the specification 2,1Y48 (filament denier 2.33 dtex, total titer 53,333 dtex) was prepared on a conventional two-stage drafting system 7, KDF 2, from Hauni, Hamburg, and sprayed with 8% triacetin.
  • the filter tow web 2 is introduced with a minimum width of 150 mm in a pair of heated calender rolls 8 and calendered with an effective line pressure of 40 kg / cm.
  • the profiled calender rolls 8 have a diameter of 230 cm and a grooved width of 350 mm and have 10 profile grooves per cm while the other is unprofiled. They are heated with a silicone oil to 150 0 C.
  • the groove profile is trapezoidal with an upper width of 0.4 mm and a depth of 0.5 mm.
  • the nonwoven 2 thus produced is passed through a spray system 9, in which an activated carbon suspension of rotors as fine
  • Droplets are applied to the endless web through a lockable slit will be carried.
  • the panel is thereby, while the web is continuously guided through the spray system, opened and closed in rapid succession, so that on the web in the longitudinal direction alternately with suspension acted upon zones 3, 4 and additive-free zones 6 arise.
  • the closing frequency of the slit diaphragm and the speed of the material web By selecting the closing frequency of the slit diaphragm and the speed of the material web, the width of the zones provided with the additive 3, 4 and the additive-free zones 6 can be selected.
  • the web is guided through the spray system at 10 m / min and the slit is opened and closed at a frequency of about 4 sec -1 , the aperture being opened and closed for the same time span.
  • the width of the activated carbon offset strip and the width of the additive-free strip 6 are so each 21 mm.
  • the web After leaving the spray 9, the web is passed through a circulating air dryer 10 at 150 0 C.
  • the dryer 10 has a drying distance of 4 m and thus ensures the drying of the suspension and the fixation of the activated carbon on the web 2 safe.
  • the fleece 2 which has been mixed with activated charcoal, is strand-folded on a commercially available filter rod machine 11, KDF 2, from Körber, Hamburg, by insertion into an inlet nozzle, wrapped with paper and cut to a filter rod length of 126 mm. Care is taken here that the cut of the filter rods takes place in each case in the middle in an activated carbon-offset zone 3 or in the middle of a non-additized zone 6.
  • the amount of activated carbon applied is 5 mg / mm in the activated carbon zones 3.
  • the filter rod is cut into filter plugs of 21 mm in length, half of their length are mixed with activated charcoal and half contain no additive.
  • the filter plug 1 are set with the activated carbon offset zone 3 to a tobacco rod of a commercial full-flavor cigarette 5.
  • filter rods 1 are prepared, which are added zone by zone with a suspension of a CO oxidation catalyst instead of activated carbon.
  • the loading of the filter rods is 5 mg / mm in the zones exposed to the CO oxidation catalyst.
  • Filter plugs of 21 mm length are cut out of the filter rods in such a way that the filter plugs are half of their length Length offset with the CO oxidation catalyst and the other half are present without an additive.
  • These filter plugs, with their side offset by the oxidation catalyst are attached to a tobacco rod of a commercially available flavor Flavor Cigarette 5.
  • Examples 1 and 2 thus correspond to the schematic representations of Figures Ia, Ib and Ic.
  • Example 1 an endless nonwoven web is passed through two spray systems 9 connected in series.
  • the first spray system 9 according to Example 1 alternately activated carbon suspension in strips of 21 mm width and uncoated
  • Zones also 21 mm wide across the width of the web 2 applied.
  • Oxidation catalyst applied to the previously uncoated zones of the web is
  • filter rods of 126 mm in length are cut out of this according to Example 1 in such a way that the cut takes place centrally in a zone offset by activated carbon or the catalyst.
  • Filter plugs of 21 mm in length are cut from the filter rods, half of their length is treated with activated charcoal and the other half are treated with the CO oxidation catalyst.
  • the filter plugs 1 are attached to the Aktivkohle- staggered ⁇ side of the mentioned in Example 1 tobacco rod of a commercial full-flavor cigarette 5.
  • Example 1 an endless nonwoven web 2 is passed through two spray systems 9 connected in series.
  • first spraying system 9 according to Example 2
  • suspensions of a CO oxidation catalyst are alternately applied in strips of 21 mm width and uncoated zones likewise 21 mm wide over the width of the fleece 2.
  • an aqueous suspension of activated carbon is applied to the previously coated with CO oxidation catalyst zones of the web.
  • Filter plugs 1 of 21 mm in length are cut from the filter rods, half of which are mixed with the CO oxidation catalyst and with activated carbon and the other half have an additive-free zone.
  • the filter plug 1 are attached to the additive offset side 3, 4 to the mentioned in Example 1 tobacco rod of a commercial full-flavor cigarette 5.
  • This example corresponds to the schematic figures 2a, 2b and 2c.
  • Example 3 cigarette filters are made of 21 mm in length, which are offset by half of their length by activated carbon and the other half are mixed with menthol.
  • the cigarette filters are attached to the activated carbon-offset side 3 of the tobacco rod mentioned in Example 1 of a commercial full-flavor cigarette.
  • Examples 3 and 5 correspond to the simplified representations of Figures 3a, 3b and 3c.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Catalysts (AREA)

Abstract

L'invention concerne un filtre ou un élément filtrant pourvu d'un corps filtrant sensiblement cylindrique, qui présente en particulier au moins deux additifs différents, ces additifs étant situés dans au moins deux zones placées l'une derrière l'autre dans le sens axial longitudinal du corps filtrant et/ou dans au moins deux zones, en particulier des couches, au moins partiellement superposées dans le sens radial du corps filtrant. Cette invention concerne également un filtre ou un élément filtrant pour la fumée du tabac pourvu d'un corps filtrant sensiblement cylindrique pouvant être réalisé à partir d'un matériau plat à l'état initial, en particulier de filaments frisés continus, de papier, d'un matelas de fibres, de tissu textile, de non-tissés et analogues, ledit corps filtrant présentant au moins deux zones placées l'une derrière l'autre dans le sens axial longitudinal du corps filtrant, une zone côté tabac étant pourvue d'un additif et une zone côté bouche étant exempte d'additif. Cette invention permet un meilleur filtrage de produits de combustion. Ladite invention concerne également un procédé particulièrement bien approprié à la fabrication de filtres ou d'éléments filtrants pour la fumée du tabac, procédé selon lequel un corps filtrant est pourvu d'au moins deux additifs différents, ces additifs étant appliqués sur un matériau de départ plat pour le corps filtrant en bandes et/ou en couches superposées sensiblement parallèles.
EP06776743A 2005-09-05 2006-08-10 Filtre ou element filtrant pour la fumee du tabac, cigarette pourvue d'un tel filtre ou element filtrant et procede de fabrication d'un tel filtre ou element filtrant Withdrawn EP1921934A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005042099A DE102005042099A1 (de) 2005-09-05 2005-09-05 Filter oder Filterelement für Tabakrauch, Zigarette mit einem derartigen Filter oder Filterelement und Verfahren zur Herstellung eines derartigen Filters oder Filterelementes
DE102005060972A DE102005060972A1 (de) 2005-12-20 2005-12-20 Filter oder Filterelement für Tabakrauch, Zigarette mit einem derartigen Filter oder Filterelement und Verfahren zur Herstellung eines derartigen Filters oder Filterelementes
PCT/EP2006/007922 WO2007028476A2 (fr) 2005-09-05 2006-08-10 Filtre ou element filtrant pour la fumee du tabac, cigarette pourvue d'un tel filtre ou element filtrant et procede de fabrication d'un tel filtre ou element filtrant

Publications (1)

Publication Number Publication Date
EP1921934A2 true EP1921934A2 (fr) 2008-05-21

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EP06776743A Withdrawn EP1921934A2 (fr) 2005-09-05 2006-08-10 Filtre ou element filtrant pour la fumee du tabac, cigarette pourvue d'un tel filtre ou element filtrant et procede de fabrication d'un tel filtre ou element filtrant

Country Status (7)

Country Link
US (1) US20100037905A1 (fr)
EP (1) EP1921934A2 (fr)
JP (1) JP2009506761A (fr)
KR (1) KR20080053314A (fr)
BR (1) BRPI0617062A2 (fr)
RU (1) RU2413438C2 (fr)
WO (1) WO2007028476A2 (fr)

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WO2009105406A2 (fr) * 2008-02-21 2009-08-27 3M Innovative Properties Company Produits d'addition d'amines et d'acides polycarboxyliques, et milieux filtrants comprenant de tels produits d'addition
GB0922253D0 (en) 2009-12-21 2010-02-03 British American Tobacco Co Sheet filter materials with additives
IT1398609B1 (it) * 2010-03-12 2013-03-08 Montrade S R L Metodo per la realizzazione di cordoni di materiale filtrante per articoli da fumo
ITBO20100150A1 (it) * 2010-03-12 2011-09-13 Montrade S R L Metodo per la realizzazione di filtri combinati per articoli da fumo
GB201007946D0 (en) * 2010-05-12 2010-06-30 British American Tobacco Co Filter additive
US9149070B2 (en) * 2011-07-14 2015-10-06 R.J. Reynolds Tobacco Company Segmented cigarette filter for selective smoke filtration
US10383369B2 (en) * 2017-06-07 2019-08-20 Rai Strategic Holdings, Inc. Fibrous filtration material for electronic smoking article
EP3815553B1 (fr) * 2019-11-04 2022-05-11 Nikolai N. Korpan Dispositif filtrant pour cigarettes et / ou pipes
KR102786560B1 (ko) * 2021-04-23 2025-03-26 주식회사 케이티앤지 필터, 이를 포함하는 에어로졸 생성 물품 및 상기 필터의 제조방법

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US3311519A (en) * 1964-01-28 1967-03-28 Eastman Kodak Co Additive filter
GB1096113A (en) * 1964-03-09 1967-12-20 Cigarette Components Ltd Improvements in or relating to tobacco smoke filters
DE2227291C3 (de) * 1972-06-05 1975-02-06 Deutsche Rhodiaceta Ag, 7800 Freiburg Verbesserung des Retentionsvermögens von Zigarettenfiltern
US20040045566A1 (en) * 2001-03-01 2004-03-11 Pera Ivo E. Tobacco smoke filter and relative composition made of antioxidant and mineral substances
FR2841438A1 (fr) * 2002-06-26 2004-01-02 Rhodia Elect & Catalysis Cigarette comprenant un catalyseur pour le traitement des fumees

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
JP2009506761A (ja) 2009-02-19
WO2007028476A3 (fr) 2007-07-26
US20100037905A1 (en) 2010-02-18
WO2007028476A2 (fr) 2007-03-15
BRPI0617062A2 (pt) 2011-07-12
RU2413438C2 (ru) 2011-03-10
RU2008113195A (ru) 2009-10-20
KR20080053314A (ko) 2008-06-12

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