EP0558166B1 - Ventilated cigarette filter - Google Patents

Ventilated cigarette filter Download PDF

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Publication number
EP0558166B1
EP0558166B1 EP19930250046 EP93250046A EP0558166B1 EP 0558166 B1 EP0558166 B1 EP 0558166B1 EP 19930250046 EP19930250046 EP 19930250046 EP 93250046 A EP93250046 A EP 93250046A EP 0558166 B1 EP0558166 B1 EP 0558166B1
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EP
European Patent Office
Prior art keywords
chamber
strand
cellulose acetate
tobacco
next
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EP19930250046
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German (de)
French (fr)
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EP0558166A3 (en
EP0558166A2 (en
Inventor
Edgar Mentzel
Henning Seidel
Wolfgang Wildenau
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Reemtsma Cigarettenfabriken GmbH
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Reemtsma H F and Ph F
H F and Ph F Reemtsma GmbH
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Priority to DE19924205658 priority patent/DE4205658A1/en
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Publication of EP0558166A2 publication Critical patent/EP0558166A2/en
Publication of EP0558166A3 publication Critical patent/EP0558166A3/en
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    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/06Use of materials for tobacco smoke filters
    • A24D3/16Use of materials for tobacco smoke filters of inorganic materials
    • A24D3/163Carbon
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/04Tobacco smoke filters characterised by their shape or structure
    • A24D3/043Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution

Description

Die Erfindung betrifft eine ventilierte Filtercigarette gemäß Oberbegriff der Patentansprüche 1 bis 6. The invention relates to a ventilated filter according to the preamble of claims 1 to. 6

Aus der DE-OS 36 35 958 ist eine ventilierte Filtercigarette mit einem Dreifachfilter bekannt, bei der die an den Tabakstrang anschließende erste Kernkomponente eine in Längsrichtung gewellte Kunststoffolie, beispielsweise aus Polyethylen, ist. From DE-OS 36 35 958 a ventilated filter with a triple filter is known, in which adjoining the tobacco rod first core component is a corrugated in the longitudinal direction of plastic sheet, for example of polyethylene. Dadurch werden Längskanäle gebildet, die in radialer Richtung im wesentlichen luftundurchlässig sind, mit denen sich ein hoher Druckabfall bei gleichzeitig geringer Teer-Retention erzielen läßt. Characterized the longitudinal channels are formed, which are impermeable in the radial direction substantially with which a high pressure drop can be achieved with simultaneously low tar retention. An die erste Kernkomponente schließt eine zweite Kernkomponente an, und zwar gegebenenfalls unter Zwischenschaltung einer mittleren, Ventilationslöcher zum Einleiten von Beiluft aufweisenden Kammer. To the first core component is a second core component follows, namely, if appropriate with interposition of a middle ventilation holes for introducing Beiluft having chamber. Die zweite Kernkomponente ist demgemäß in einer mundseitigen Kammer angeordnet und bewirkt bei ebenfalls verhältnismäßig geringer Teer-Retention einen geringen Druckabfall. The second core component is thus arranged in a mouth-side chamber and also effected at relatively low tar retention a low pressure drop.

Ein Nachteil der bekannten Cigarette besteht aber darin, daß die strangseitige Kernkomponente nicht umweltfreundlich ist, da sie aus einer Kunststoffolie wie Polyethylen besteht. A disadvantage of the known cigarette, however, is that the strand-side core component is not environmentally friendly because it is made of a plastic film such as polyethylene. Ein weiterer Nachteil besteht darin, daß die maßhaltige Fertigung dieser Kernkomponente technisch aufwendig ist. Another disadvantage is that the dimensionally accurate production of this core component is technically complex.

Aus der FR-A-2.104.312 ist eine unventilierte Cigarette mit einem Dreikammerfilter bekannt, bei dem die erste und dritte Kammer zur Gänze mit Filtermaterial gefüllt sind, während die dazwischenliegende zweite oder mittlere Kammer Aktivkohleteilchen enthält. From FR-A-2104312 an unventilated Cigarette with a three-chamber filter is known, wherein the first and third chambers are completely filled with filter material, while the intermediate second or middle chamber contains activated carbon particles.

Einen ähnlichen Dreikammerfilter offenbart die DE-B-26 36 316 . A similar three-chamber filter is disclosed in DE-B-26 36 316th Allerdings ist das Mundstückpapier im Bereich der mittleren Kammer mit Perforationen versehen, so daß sich eine ventilierte Filtercigarette ergibt. However, the tipping paper in the middle chamber is provided with perforations, so that a ventilated filter results.

Aus der DE-A-28 49 904 ist ein Mono-Koaxialfilter bekannt, der in einigen Ausführungsformen außerdem mit Löchern zum Einleiten von Beiluft versehen ist, so daß sich ebenfalls eine ventilierte Filtercigarette ergibt. From DE-A-28 49 904, a mono-coaxial filter is known, which is also provided in some embodiments, with holes for introducing Beiluft, so that also a ventilated filter results. Im wesentlichen ist dabei ein Kern aus Celluloseacetatfasern von einem für den Hauptstomrauch undurchlässigen Mantel aus geschlossenzelligem Schaumstoff umgeben, so daß der Hauptstromrauch durch einen bestimmten Bereich strömen muß. Essentially, a core of cellulose acetate fibers is surrounded by an impermeable jacket for the Hauptstomrauch of closed cell foam, so that the mainstream smoke must flow through a particular area.

Schließlich offenbart die BE-A-628 867 einen Mono-Koaxialfilter, bei dem in einer Ausführungsform ein für den Hauptstromrauch durchlässiger Kern von einem die Stömung behindernden Mantel umgeben ist (siehe Figur 8). Finally, BE-A-628 867 discloses a mono-coaxial filter in which a more permeable to the mainstream smoke of a core, the sheath is surrounded Stömung disabling in one embodiment (see Figure 8).

Aufgabe der Erfindung ist es, die bekannte Filtercigarette, die den Geschmack einer sogenannten "starken" Cigarette hat, dahingehend weiterzubilden, daß alle Filterkerne bei einfacher, maßhaltiger Fertigung aus umweltfreundlichem Material hergestellt werden können. The object of the invention is the well-known filter cigarette, the taste of a so-called "strong" cigarette has to develop in such a way that all the filter cores can be manufactured with simple, dimensionally accurate production of environmentally-friendly material.

Zur Lösung dieser Aufgabe dienen die kennzeichnenden Merkmale der Patentansprüche 1 bis 6 in Verbindung mit den Merkmalen ihres jeweiligen Oberbegriffs. To achieve this object, the characterizing features of claims 1 to 6 are used in conjunction with the features of their respective preamble.

Dadurch kann der Durchmesser des für die Teer-Retention relevanten Filterkerns in einer Weise reduziert werden, daß sich in diesem Bereich höhere Durchflußgeschwindigkeiten des Hauptstromrauches ergeben, und zwar mit der Folge, daß die Retentionsmechanismen des Diffusionseffektes und des Sperreffektes abnehmen, während die des Trägheitseffektes zunehmen, so daß insgesamt eine geringere Retention als bei einem üblichen Filter erzielt wird. Characterized the diameter of the relevant for the tar retention filter core can be reduced in a way, that higher flow rates of the main stream smoke arise in this area, with the result that the retention mechanisms of the diffusion effect and the barrier effect decrease, while that of the inertia effect to increase , so that overall a lower retention than in a conventional filter is obtained. Dies läßt sich entweder durch einen Filterkern aus Celluloseacetatfasern oder durch Kanülen oder Kanäle erreichen, die aus Celluloseacetatfolie gebildet sind. This can be achieved, which are formed of cellulose acetate by either a filter core of cellulose acetate fibers or through cannulas or channels. Celluloseacetat ist verrottbar und damit umweltfreundlich. Cellulose is degradable and therefore environmentally friendly. Der den Celluloseacetatkern umgebende luftundurchlässige Mantel kann ebenfalls aus Celluloseacetatfasern gebildet werden, die jedoch wesentlich stärker verdichtet und damit sowohl in Längsrichtung, als auch in radialer Richtung praktisch luftundurchlässig sind. The Celluloseacetatkern the surrounding air-impermeable shell can also be formed from cellulose acetate fibers, however, much more compressed and therefore both in the longitudinal direction than are practically impermeable to air and in the radial direction. Da Kanülen oder Kanäle in diesen luftundurchlässigen Mantel aus verdichteten Celluloseacetatfasern ohne weitere Hüllen eingeformt oder eingestochen werden können, ist das Filtermaterial für die gesamte strangseitige Kernkomponente nach wie vor umweltfreundlich. Since cannulas or channels in these airtight casing may be molded or compressed cellulose acetate fibers without further cases inserted, the filter material for the entire strand-side core component is still environmentally friendly.

Die Kanülen oder Kanäle sind im Zentrum der ersten Kammer angeordnet, oder sie können in einer anderen Ausführungsform mundseitig am Umfang der weitgehend luftundurchlässigen, verdichteten Celluloseacetatfasern liegen. The cannulas or channels are arranged in the center of the first chamber, or may in another embodiment the mouth side on the circumference substantially impermeable to air of the compacted are cellulose acetate fibers. Die am Umfang im mundseitigen Teil angeordneten, vorzugsweise eingeprägten Kanäle können außerdem nach außen hin offen sein, wobei sie dann von einem Filterbelagpapier nach außen abgedeckt werden. The circumferentially arranged in the mouth-side part, preferably embossed channels may also be open, where they are then covered by a filter tipping paper to the outside from the outside. Die außen liegenden Kanäle können im übrigen geradlinig oder schraubenförmig verlaufen. The channels outer can extend rectilinearly or helically in the other. Es sind auch Zickzackmuster denkbar. There are also conceivable zigzag pattern. In einer bevorzugten Ausführungsform ist die zwischen den beiden Kernkomponente liegende mittlere Kammer mit Aktivkohle gefüllt und mit Ventilationsbohrungen versehen. In a preferred embodiment, the core component lying between the two middle chamber is filled with activated carbon and provided with ventilation holes. Der Füllungsgrad der mittleren Kammer hängt von den Fertigungsmöglichkeiten ab. The degree of filling of the middle chamber is dependent on the manufacturing possibilities. In der Regel läßt sich die mittlere Kammer nur mit einer das Volumen zu 60 bis 80% ausfüllenden Menge an Aktivkohle befüllen. In general, the central chamber, the volume to 60 to 80% can only fill the filling amount of activated carbon with a. Die Ventilationsbohrungen werden auf übliche Weise hergestellt, beispielsweise durch Laserperforierung, durch mechanische Perforierung mit Stachelwalzen, auf elektromechanischem Wege durch Funkenentladung oder durch Verwendung von naturporösem Belagpapier. The ventilation holes are made in the usual manner, such as by laser perforation, by mechanical perforation with spiked rollers, by electromechanical means by spark discharge or by using naturporösem tipping paper.

Aus der EP-PS 0 321 740 ist eine ventilierte Koaxialfiltercigarette mit lediglich einem Filterelement bekannt, bei der der Mantel und der Kern des Koaxialfilters die beiden durch sie hindurchströmenden unterschiedlichen Rauchströme auf unterschiedliche Weise, aber in jedem Fall stark filtrieren. From EP-PS 0,321,740 a ventilated Koaxialfiltercigarette with only one filter element is known in which the sheath and the core of the coaxial heavily filter the two different smoke passing therethrough flows in different ways, but in any case.

Bislang war es technisch nicht machbar, den Hauptstromrauch zur Gänze direkt in die Kohleteilchen eines Aktivkohlefilters zu leiten. Until now, it was not technically feasible to conduct the mainstream smoke entirely directly into the coal particles of an activated carbon filter.

Der Hauptstromrauch der erfindungsgemäßen Cigarette wird jedoch in seiner bevorzugten Ausführungsform konstruktionsbedingt in und durch die Sorptionsgranulat-Teilchen des Kammerfilters gelenkt, was eine optimale Gasphasen-Sorption ermöglicht. The mainstream smoke of the cigarette according to the invention is however in its preferred embodiment, by design directed into and through the Sorptionsgranulat particles of the filter chamber, which allows an optimal gas-sorption.

Grundsätzlich führt der Einsatz von gasphasenaktivem Material zu einer unerwünschten Geschmacksveränderung. In principle, the use of gas-phase active material in an undesirable change in taste results. Diesen Nachteil hat man versucht einzuschränken, und zwar durch Beschichtung der Kohlenstoffteilchen gemäß DE-PS 2 527 569 oder durch Einsatz von Diaphragmen aus dampfdurchlässigem Material, zB gemäß DE-OS 2 355 493. This disadvantage has attempted to limit, by coating the carbon particles according to DE-PS 2,527,569, or by use of diaphragms of vapor-permeable material, for example according to DE-OS 2,355,493.

Durch eine in der parallelen Patentanmeldung DE-OS 41 05 500 ausführlich beschriebene Kombination von (a) Aromatisierung des Tabakstranges mit einem Gemisch von Aromastoffen aus zwei bestimmten Gruppen und (b) Einsatz eines bestimmten Adsorptionsmittels und (c) Ermöglichung einer bestimmten Ventilierung und (d) Kombination zweier Filterelemente erreicht man zum Beispiel eine Gasphasenmenge, die einer modernen Cigarette im "Ultra-Leicht"-Bereich, von unter 2 mg Kondensat/Cigarette entspricht, während die Partikelphasenmenge dieser Cigarette im "Leicht"-Bereich liegend mit etwa 5 bis 6 mg Kondensat/Cigarette bestimmt wurde, und wobei ferner insgesamt ein guter Geschmack ohne "Neben- oder Kohle-Geschmack" auftritt. By one in the parallel patent application DE-OS 41 05 500 a combination of (a) aromatization of the tobacco rod with a mixture of aroma substances from two distinct groups, and (b) use of a particular adsorbent and (c) allowing a specific valving and (d described in detail ) combination of two filter elements is achieved, for example, a gas phase quantity corresponding to a modern cigarette in the "ultra-light" area of ​​less than 2 mg condensate / cigarette, while the particle phase quantity of these cigarette in the "light" region lying at about 5 to 6 Cigarette was determined mg condensate /, and further wherein a total of a good flavor without "side or charcoal taste" occurs. Auf diesen Effekt - drastische Reduzierung des "Neben- oder Kohlegeschmacks" - wird in der vorliegenden Anmeldung ausdrücklich Bezug genommen. To this effect - drastic reduction of "incidental or charcoal taste" - is expressly incorporated by reference in the present application.

Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen. Advantageous embodiments of the invention emerge from the subclaims.

Die Erfindung wird im folgenden anhand einer Zeichnung näher erläutert; The invention is explained below on the basis of a drawing; es zeigen: show it:

Figur 1 Figure 1
einen schematischen Längsschnitt durch ein erstes Ausführungsbeispiel; shows a schematic longitudinal section through a first embodiment;
Figur 2 Figure 2
einen Schnitt entlang den Linien AA bzw. A'-A' durch das Ausführungsbeispiel nach Figur 1; a section along the lines AA or A'-A 'through the embodiment of Figure 1;
Figur 3 Figure 3
einen schematischen Längsschnitt durch ein zweites Ausführungsbeispiel; shows a schematic longitudinal section through a second embodiment;
Figur 4 Figure 4
einen Schnitt entlang der Linie BB durch das Ausführungsbeispiel von Figur 3; a section along the line B-B through the embodiment of Figure 3;
Figur 5 Figure 5
einen schematischen Längsschnitt durch ein drittes Ausführungsbeispiel; shows a schematic longitudinal section through a third embodiment;
Figur 6 Figure 6
einen Schnitt entlang der Linie CC durch das Ausführungsbeispiel von Figur 5; a section along the line CC through the embodiment of Figure 5;
Figur 7 Figure 7
einen schematischen Längsschnitt durch ein viertes Ausführungsbeispiel; shows a schematic longitudinal section through a fourth embodiment;
Figur 8 Figure 8
einen Schnitt entlang der Linie DD durch das Ausführungsbeispiel von Figur 7; a section along the line DD of the embodiment of Figure 7;
Figur 9 Figure 9
einen schematischen Längsschnitt durch ein fünftes Ausführungsbeispiel; shows a schematic longitudinal section through a fifth embodiment;
Figur 10 Figure 10
einen schematischen Längsschnitt durch ein sechstes Ausführungsbeispiel; shows a schematic longitudinal section through a sixth embodiment; und and
Figur 11 Figure 11
einen Schnitt entlang der Linie EE durch das Ausführungsbeispiel von Figur 10. a section along the line EE of the embodiment of Figure 10th

In den verschiedenen Ausführungsbeispielen sind stets gleiche Teile mit gleichen Bezugszeichen versehen. In the various embodiments, identical parts are always provided with the same reference numerals.

Figur 1 zeigt ein erstes Ausführungsbeispiel, bei dem der Tabakstrang 10 nur angedeutet dargestellt ist. 1 shows a first embodiment in which the tobacco rod 10 is shown in phantom. An den Tabakstrang 10 schließt der Filter mit einer ersten Kammer 2, einer zweiten Kammer 4 und einer dritten Kammer 6 an. To the tobacco rod 10 of the filter connects with a first chamber 2, a second chamber 4 and third chamber. 6 Die erste Kammer 2 wird auch als "strangseitige" Kammer, die daran anschließende zweite Kammer 4 auch als "mittlere" Kammer und die an die mittlere Kammer anschließende dritte Kammer 6 auch als "mundseitige" Kammer bezeichnet. The first chamber 2 is also known as "rod end" chamber, the adjoining second chamber 4 as the "middle" chamber and adjoining the middle chamber third chamber 6 also referred to as "mouth-side" chamber. Die drei Kammern 2, 4 und 6 und ein Teil des Tabakstrangs 10 werden von einer Umhüllung 8 umgeben, die ein bei der Cigarettenherstellung übliches Filterbelagpapier ist. The three chambers 2, 4 and 6 and a portion of the tobacco rod 10 surrounded by an envelope 8, which is a common in cigarette filter tipping paper. In der strangseitigen, ersten Kammer 2 wird die Kernkomponente von einem luftdurchlässigen Kern 12 aus Celluloseacetatfasern gebildet, der für den Hauptstromrauch durchlässig ist. In the strand-side, first chamber 2 the core component of an air-permeable core 12 of cellulose acetate fibers is formed, which is permeable to the mainstream smoke. Der Kern 12 wird von einem praktisch luftundurchlässigen Mantel 14 aus stark verdichteten Celluloseacetatfasern umgeben, die ebenso wie das Material für den Kern 12 verrottbar und damit umweltfreundlich sind. The core 12 is surrounded by a practically air-impermeable casing 14 made of highly compressed cellulose acetate fibers, which are the same as the material for the core 12 degradable and therefore environmentally friendly.

Die Verdichtung der Celluloseacetatfasern des Mantels 14 ist derart gewählt, daß nahezu kein Hauptstromrauch hindurchströmen kann. The compression of the cellulose acetate fibers of the sheath 14 is chosen such that almost no mainstream smoke to flow therethrough. Durch die mittige Lage und die geeignete Wahl des Kerndurchmessers 12 läßt sich einerseits ein gewünschter hoher Druckabfall im Hauptstromrauch bei gleichzeitig geringer Teer-Retention erzielen, andererseits wird der durch den Kern 12 strömende Hauptstromrauch zwangsweise in jeder Cigarettenposition durch das in der mittleren Kammer 4 befindliche Sorptionsmittel, vorzugsweise Aktivkohle, geführt. Due to the central location and the suitable choice of the core diameter 12 on the one hand a desired high pressure drop in the main stream smoke with simultaneously low tar retention can be achieved, on the other hand the air flowing through the core 12 mainstream smoke is forced to be in any Cigarettenposition by the left hand in the middle chamber 4 sorbent , preferably activated carbon made.

Um die oben genannten unerwünschten geschmacklichen Beeinträchtigungen zu eliminieren, können bestimmte Aromastoffe sowohl in die Tabakmischung als auch auf das Filtermaterial appliziert werden. In order to eliminate the undesirable taste impairments mentioned above, a given substance can be applied both in the tobacco blend as well as to the filter material. Einzelheiten hierzu sind in der parallelen deutschen Patentanmeldung P 41 05 500.4 beschrieben, auf die hiermit ausdrücklich Bezug genommen wird. Details are described in the parallel German patent application P 41 05 500.4, which is incorporated herein by reference.

Die durch Ventilationslöcher in die Kammer 4 eintretende Beiluft wird dort mit Hauptstromrauch vermengt und tritt anschließend durch die mundseitige Kammer 6 aus, die in diesem Ausführungsbeispiel identisch wie die erste Kammer 2 gebaut ist, dh sie besitzt ebenfalls einen luftdurchlässigen Kern 12 aus Celluloseacetatfasern, die von einem nahezu luftundurchlässigen Mantel 14 umgeben sind. The Beiluft entering through ventilation holes in the chamber 4 is mixed there with the main smoke flow, and then exits through the mouth-side chamber 6, which is constructed identically to the first chamber 2 in this embodiment, that is, it also has an air-permeable core 12 of cellulose acetate fibers of a virtually air-impermeable casing are surrounded fourteenth

Figur 2 zeigt einen Schnitt durch die erste Kammer 2 entlang der Linie AA. Figure 2 shows a section through the first chamber 2 along the line AA. Der Schnitt AA entspricht außerdem dem Schnitt A'-A' durch die dritte Kammer 6. Man erkennt den im Querschnitt kreisförmigen mittleren Kern 12 aus luftdurchlässigen Celluloseacetatfasern oder anderen verrottbaren Fasern, die von dem ringförmigen Mantel 14 aus nahezu luftundurchlässigem, verrottbarem Material, vorzugsweise dichtgepreßten Celluloseacetatfasern, umgeben sind. The section A also corresponds to the section A'-A 'through the third chamber 6. One can see the circular cross-sectional central core 12 made of air-permeable cellulose acetate fibers or other rottable fibers dichtgepreßten of the annular jacket 14 from virtually air-impermeable, decomposable material, preferably cellulose acetate fibers are surrounded. Auf diese Weise kann der Hauptstromrauch aus dem Tabakstrang 10 nur durch den mittleren Kern 12 strömen. In this way, the mainstream smoke can flow out from the tobacco strand 10 only through the central core 12th Da das erfindungsgemäß angeordnete, beziehungsweise ausgelegte Celluloseacetat eine geringe Teer-Retention hat, ist in beiden Kammern 2 und 6 die Teer-Retention verhältnismäßig klein. Since the invention is arranged, respectively designed cellulose acetate has a low tar retention, in the two chambers 2 and 6, the tar retention is relatively small.

Figur 3 zeigt ein weiteres Ausführungsbeispiel, bei dem die Kernkomponente in der mundseitigen Kammer 6 invers zu der strangseitigen Kammer 2 ausgebildet ist. Figure 3 shows a further embodiment in which the core component in the mouth-side chamber 6 is formed inversely to the strand-side chamber. 2 Im übrigen entspricht der Filter dem von Figur 1, dh die erste und zweite Kammer 2 und 4 entsprechen denen des ersten Ausführungsbeispiels. Incidentally, the filter corresponds to that of Figure 1, ie the first and second chambers 2 and 4 correspond to those of the first embodiment. Bei dem Ausführungsbeispiel nach Figur 3 hat die Kernkomponente der mundseitigen Kammer einen luftundurchlässigen Kern 34, der von einem luftdurchlässigen Mantel 32 umgeben ist. In the embodiment according to Figure 3 the core component of the mouth-side chamber has an air-impermeable core 34 which is surrounded by an air-permeable mantle 32nd

Figur 4 zeigt einen Schnitt BB durch die Kernkomponente der mundseitigen Kammer 6 von Figur 3. Man erkennt, daß der luftundurchlässige Kern 34 aus beispielsweise verdichteten Celluloseacetatfasern von einem ringförmigen Mantel 32 aus beispielsweise unverdichteten Celluloseacetatfasern umgeben ist, die zweckmäßigerweise in Längsrichtung des Filters luftdurchlässig sind. Figure 4 shows a section BB through the core component of the mouth-side chamber 6 of Figure 3. It is seen that the air-impermeable core 34 is made of, for example, compressed cellulose acetate fibers surrounded by an annular jacket 32 of, for example uncompacted cellulose acetate fibers which are permeable to air, conveniently in the longitudinal direction of the filter. Dadurch wird der zentral durch die erste Kammer 2 strömende Hauptstromrauch nach Passieren der mittleren Kammer 4 zum Eintritt in die mundseitige Kammer 6 ringförmig aufgeweitet und strömt ringförmig nach außen in Richtung der Pfeile P. Thereby, the central flowing through the first chamber 2 mainstream smoke after passing through the middle chamber 4 is expanded annularly in the mouth-side chamber 6 to the inlet and flows annularly outward in the direction of the arrows P.

Figur 5 zeigt eine zweite Ausführungsform der strangseitigen Kernkomponente, bei der eine zentrale Kanüle 16 in den die Kammer 2 voll ausfüllenden Körper 14' aus nahezu luftundurchlässigem Material eingeformt ist. Figure 5 shows a second embodiment of the strand-side core component, in which a central cannula is in the chamber 2 fully filling body 14 formed 16 'from virtually air-impermeable material. Der luftundurchlässige Körper 14' besteht wiederum aus stark verdichteten Celluloseacetatfasern, die verrotten können und damit umweltfreundlich sind. The airtight body 14 'again consists of highly compressed cellulose acetate fibers which can rot and are environmentally friendly. Der Hauptstromrauch kann praktisch nicht durch die verdichteten Celluloseacetatfasern weder in axialer, noch in radialer Richtung hindurchtreten, sondern muß durch die Kanüle 16 in die mittlere Kammer 4 strömen. The mainstream smoke is virtually impossible to pass through the compacted cellulose acetate fibers, neither in the axial, still in the radial direction, but must flow through the cannula 16 into the middle chamber. 4

Figur 6 zeigt einen Schnitt entlang der Linie CC in Figur 5 durch die strangseitige Kammer 2. Man erkennt aus den Figuren 5 und 6 ohne weiteres, daß der Hauptstromrauch nur durch den zentralen Kanal 16 in die mittlere Kammer 4 strömt und dort auf die darin befindliche Aktivkohle prallt. Figure 6 shows a section along the line CC in Figure 5 through the strand-side chamber 2. It can be seen from Figures 5 and 6 readily appreciated that the mainstream smoke to flow only through the central channel 16 in the middle chamber 4, and there to the therein activated carbon rebounds. Ein anderer Weg ist für den Hauptstromrauch versperrt, da der Körper 14' aus verdichteten Celluloseacetatfasern nahezu luftundurchlässig ist. Another way is blocked for the mainstream smoke, as the body is virtually impermeable to air 14 'from compressed cellulose acetate fibers. Dies ergibt einen hinreichend hohen Druckabfall bei gleichzeitig geringer Teer-Retention. This results in a sufficiently high pressure drop with simultaneously low tar retention.

Die mundseitige Kammer 6 wird von einer Kernkomponente wie bei dem Ausführungsbeispiel nach Figur 1 gebildet, also von einem zentralen Kern 12 aus luftdurchlässigen Celluloseacetatfasern, der von einem Mantel 14 aus verdichteteten und damit nahezu luftundurchlässigen Celluloseacetatfasern umgeben ist. The mouth-side chamber 6 is formed by a core component as in the embodiment of Figure 1, so from a central core 12 made of air-permeable cellulose acetate fibers, which is surrounded by a sheath 14 made of verdichteteten and thus virtually air-impermeable cellulose acetate fibers.

Figur 7 zeigt eine weiteres Ausführungsbeispiel, bei dem die Kernkomponente der strangseitigen Kammer 2 der von Figur 5 entspricht, jedoch im Zentrum mehrere Kanäle 16' aufweist. Figure 7 shows a further embodiment in which the core component of the strand-side chamber 2 corresponds to that of Figure 5, but in the center having a plurality of channels 16 '. Die Kernkomponente der mundseitigen Kammer 6 ist ähnlich der von Figur 3 ist, dh ein nahezu luftundurchlässiger Kern 44 ist von einem Mantel 42 aus luftdurchlässigen Celluloseacetatfasern umgeben. The core component of the mouth-side chamber 6 is similar to that of Figure 3, ie an almost air-impermeable core 44 is surrounded by a sheath 42 made of air-permeable cellulose acetate fibers.

Figur 8 zeigt einen Schnitt entlang der Linie DD durch die mundseitige Kammer 6 des Ausführungsbeispiels von Figur 7. Man erkennt dabei, daß der verdichtete, nahezu luftundurchlässige Kern 44 aus Celluloseacetatfasern einen verhältnismäßig großen Durchmesser gegenüber dem nach der Ausführungsform von Figur 4 hat. Figure 8 shows a section along the line DD through the mouth-side chamber 6 of the embodiment of figure 7. It can be seen here that the compressed, almost air-impermeable core of cellulose acetate has a relatively large diameter compared to the according to the embodiment of Figure 4 44th Damit wird angedeutet, daß durch Wahl der einzelnen Filterkernquerschnitte die Durchflußgeschwindigkeiten und damit der Druckabfall ohne weiteres einstellbar sind. So that the flow rates and the pressure drop are readily adjustable by selection of the individual filter core cross sections is suggested. Auch bei diesem Ausführungsbeispiel strömt der Hauptstromrauch zentral in die mittlere Kammer 4 ein, in der er auf die beispielsweise mit Aromastoffen gemäß Erfindung beladene Aktivkohle prallt, mit Beiluft versetzt wird und durch den Mantel 42 der mundseitigen Kammer 6 ringförmig ausströmt. Also in this embodiment, the main stream smoke flows centrally into the middle chamber 4, in which it impinges on the example with flavoring substances loaded in accordance with the invention activated carbon is added to Beiluft and annularly flowing through the jacket 42 of the mouth-side chamber. 6

Figur 9 zeigt ein anderes Ausführungsbeispiel, bei dem die Kernkomponente der strangseitigen Kammer 2 der von Figur 1 entspricht, dh es ist ein luftdurchlässiger Kern 12 aus verrottbaren Celluloseacetatfasern von einem nahezu luftundurchlässigen Mantel 14 aus verdichteten Celluloseacetatfasern umgeben. Figure 9 shows another embodiment in which the core component of the strand-side chamber 2 corresponds to that of Figure 1, ie it is an air-permeable core 12 surrounded by cellulose acetate of decomposable an almost air-impermeable casing 14 made of compressed cellulose acetate fibers. Der Hauptstromrauch strömt also mittig oder zentral in die mit Aktivkohle befüllte mittlere Kammer 4. In dieser wird er wie bei den anderen Ausführungsbeispielen durch die Ventilationslöcher 5 mit Beiluft versetzt, um dann durch einen üblichen mundseitigen Kern 22 aus Celluloseacetatfasern mit einem relativ geringen Gesamt-Titer auszuströmen. Thus, the mainstream smoke flows centrally or centrally in the filled with activated carbon middle chamber 4. In this it is placed as in the other embodiments, through the ventilation holes 5 with Beiluft, and then by a conventional mouth-side core 22 of cellulose acetate fibers with a relatively small overall titer emanate. In der mundseitigen Kammer 6 herrscht damit ein verhältnismäßig geringer Druckabfall bei gleichzeitig geringer Teer-Retention. In the mouth-side chamber 6 so that there is a relatively low pressure drop with simultaneously low tar retention.

Figur 10 zeigt ein weiteres Ausführungsbeispiel mit einer strangseitigen Kammer 2 und einer mittleren Kammer 4 entsprechend dem Ausführungsbeispiel nach Figur 5, jedoch mit einer mundseitigen Kammer 6, die von einem für den Hauptstromrauch nahezu undurchlässigen Kern 14' mit peripheren Kanälen 16' ausgefüllt ist. Figure 10 shows another embodiment having a strand-side chamber 2 and a central chamber 4 according to the embodiment of Figure 5, but with a mouth-side chamber 6 which is filled by a virtually impermeable for the main smoke flow core 14 'with peripheral channels 16'.

Figur 11 zeigt einen Schnitt entlang der Linie EE durch die mundseitige Kammer 6 des Ausführungsbeispiels von Figur 10. Man erkennt dabei vier Kanäle 16 ', die in den Außenumfang des die dritte Kammer 6 zur Gänze ausfüllenden, praktisch luftundurchlässigen Körpers oder Kerns 14' eingeformt sind, so daß der aus der mittleren Kammer 4 einströmende Rauch nur am Umfang der mundseitigen Kammer 6 in Richtung der Pfeile ausströmen kann. Are 11 shows a section along the line EE through the mouth-side chamber 6 of the embodiment of Figure 10. It can be seen here, four channels 16 'which fills in the outer circumference of the third chamber 6 in its entirety, practically air-impermeable body or core 14' formed so that the flowing out of the middle chamber 4 smoke can flow in the direction of the arrows, only the periphery of the mouth-side chamber. 6

Es wird darauf hingewiesen, daß der Fachmann die Filterkomponenten der ersten uns dritten Kammern 2 und 6 auch auf andere Weise kombinieren kann, als dies in den Figuren dargestellt ist. It should be noted that the expert can combine in a different way, the filter components of the first us third chambers 2 and 6 also, as shown in FIGS.

Claims (11)

  1. A ventilated filtertip cigarette having a triple or three-chamber filter in which
    a) the first chamber (2) next the strand of tobacco contains a filter section permeable to air;
    b) the adjoining second chamber (4) is a middle chamber filled with an adsorbent; and
    c) the third chamber (6) next the mouth and adjoining the middle chamber (4), contains a further filter section permeable to air;
    d) all three chambers (2, 4, 6) being surrounded by two common sheaths (8) which in themselves are airtight yet are provided at intervals with ventilation holes and of which one also encloses the adjoining region of the strand (10) of tobacco;
    characterized in that
    e) the filter section arranged in the first chamber (2) next the strand of tobacco exhibits a coaxial core (12) of cellulose acetate or other rottable fibres permeable to the main flow of smoke and surrounded by a jacket (14) of cellulose acetate fibres or other rottable material and nearly impermeable to the main flow of smoke;
    f) the second chamber (4) is 95% filled with adorbent, usefully consisting of activated carbon of pore volume from 0.7 to 0.8 cm3/g, pore radius from 0.9 to 1 nm and grain size distribution corresponding with a screen mesh width in the range from 177 µm to 500 µm; and
    g) the build-up of the third chamber (6) is the same as that of the first chamber (2).
  2. A ventilated filtertip cigarette having a triple or three-chamber filter in which
    a) the first chamber (2) next the strand of tobacco contains a filter section permeable to air;
    b) the adjoining second chamber (4) is a middle chamber filled with an adsorbent; and
    c) the third chamber (6) next the mouth and adjoining the middle chamber (4), contains a further filter section permeable to air;
    d) all three chambers (2, 4, 6) being surrounded by two common sheaths (8) which in themselves are airtight yet are provided at intervals with ventilation holes and of which one also encloses the adjoining region of the strand (10) of tobacco;
    characterized in that
    e) the filter section arranged in the first chamber (2) next the strand of tobacco exhibits a coaxial core (12) of cellulose acetate or other rottable fibres permeable to the main flow of smoke and surrounded by a jacket (14) of cellulose acetate fibres or other rottable material and nearly impermeable to the main flow of smoke;
    f) the second chamber (4) is 95% filled with adsorbent, usefully consisting of activated carbon of pore volume from 0.7 to 0.8 cm3/g, pore radius from 0.9 to 1 nm and grain size distribution corresponding with a screen mesh width in the range from 177 µm to 500 µm; and
    g) the third chamber (6) exhibits a core (34) of cellulose acetate fibres or other rottable material, surrounded by a jacket (32) of cellulose acetate or other rottable fibres and permeable to the main flow of smoke.
  3. A ventilated filtertip cigarette having a triple or three-chamber filter in which
    a) the first chamber (2) next the strand of tobacco contains a filter section permeable to air;
    b) the adjoining second chamber (4) is a middle chamber filled with an adsorbent; and
    c) the third chamber (6) next the mouth and adjoining the middle chamber (4), contains a further filter section permeable to air;
    d) all three chambers (2, 4, 6) being surrounded by two common sheaths (8) which in themselves are airtight yet are provided at intervals with ventilation holes and of which one also encloses the adjoining region of the strand (10) of tobacco;
    characterized in that
    e) the filter section arranged in the first chamber (2) next the strand of tobacco exhibits a coaxial core (12) of cellulose acetate or other rottable fibres permeable to the main flow of smoke and surrounded by a jacket (14) of cellulose acetate fibres or other rottable material and nearly impermeable to the main flow of smoke;
    f) the second chamber (4) is 95% filled with adsorbent, usefully consisting of activated carbon of pore volume from 0.7 to 0.8 cm3/g, pore radius from 0.9 to 1 nm and grain size distribution corresponding with a screen mesh width in the range from 177 µm to 500 µm; and
    g) the third chamber (6) exhibits as filter element a core (22) of rottable cellulose acetate fibres of small overall titer which fill the chamber wholly.
  4. A ventilated filtertip cigarette having a triple or three-chamber filter in which
    a) the first chamber (2) next the strand of tobacco contains a filter section permeable to air;
    b) the adjoining second chamber (4) is a middle chamber filled with an adsorbent; and
    c) the third chamber (6) next the mouth and adjoining the middle chamber (4), contains a further filter section permeable to air;
    d) all three chambers (2, 4, 6) being surrounded by two common sheaths (8) which in themselves are airtight yet are provided at intervals with ventilation holes and of which one also encloses the adjoining region of the strand (10) of tobacco;
    characterized in that
    e) the filter section arranged in the first chamber (2) next the strand of tobacco has a cylindrical body (14') of nearly impermeable tightly compressed rottable cellulose acetate fibres, which completely fills the first chamber (2) and in which one or more continuous tubes (16) or channels (16') are provided;
    f) the second chamber (4) is 95% filled with adsorbent, usefully consisting of activated carbon of pore volume from 0.7 to 0.8 cm3/g, pore radius from 0.9 to 1 nm and grain size distribution corresponding with a screen mesh width in the range from 177 µm to 500 µm; and
    g) the third chamber (6) exhibits a coaxial core (12) of cellulose acetate or other rottable fibres permeable to the main flow of smoke and surrounded by a jacket (14) of cellulose acetate fibres or other rottable material and nearly impermeable to the main flow of smoke.
  5. A ventilated filtertip cigarette having a triple or three-chamber filter in which
    a) the first chamber (2) next the strand of tobacco contains a filter section permeable to air;
    b) the adjoining second chamber (4) is a middle chamber filled with an adsorbent; and
    c) the third chamber (6) next the mouth and adjoining the middle chamber (4), contains a further filter section permeable to air;
    d) all three chambers (2, 4, 6) being surrounded by two common sheaths (8) which in themselves are airtight yet are provided at intervals with ventilation holes and of which one also encloses the adjoining region of the strand (10) of tobacco;
    characterized in that
    e) the filter section arranged in the first chamber (2) next the strand of tobacco has a cylindrical body (14') of nearly impermeable tightly compressed rottable cellulose acetate fibres, which completely fills the first chamber (2) and in which one or more continuous tubes (16) or channels (16') are provided;
    f) the second chamber (4) is 95% filled with adsorbent, usefully consisting of activated carbon of pore volume from 0.7 to 0.8 cm3/g, pore radius from 0.9 to 1 nm and grain size distribution corresponding with a screen mesh width in the range from 177 µm to 500 µm; and
    g) the third chamber (6) exhibits a core (44) of cellulose acetate fibres or other rottable material, surrounded by a jacket (42) of cellulose acetate or other rottable fibres and permeable to the main flow of smoke.
  6. A ventilated filtertip cigarette having a triple or three-chamber filter in which
    a) the first chamber (2) next the strand of tobacco contains a filter section permeable to air;
    b) the adjoining second chamber (4) is a middle chamber filled with an adsorbent; and
    c) the third chamber (6) next the mouth and adjoining the middle chamber (4), contains a further filter section permeable to air;
    d) all three chambers (2, 4, 6) being surrounded by two common sheaths (8) which in themselves are airtight yet are provided at intervals with ventilation holes and of which one also encloses the adjoining region of the strand (10) of tobacco;
    characterized in that
    e) the filter section arranged in the first chamber (2) next the strand of tobacco has a cylindrical body (14') of nearly impermeable tightly compressed rottable cellulose acetate fibres, which completely fills the first chamber (2) and in which one or more continuous tubes (16) or channels (16') are provided:
    f) the second chamber (4) is 95% filled with adsorbent, usefully consisting of activated carbon of pore volume from 0.7 to 0.8 cm3/g, pore radius from 0.9 to 1 nm and grain size distribution corresponding with a screen mesh width in the range from 177 µm to 500 µm; and
    g) the third chamber (6) exhibits a core (14') impermeable to air, into the outer periphery of which a number of continuous channels (16') are moulded.
  7. A cigarette as in Claim 4 or 6, characterized in that
       the tube (16) is arranged in the centre of the first chamber (2).
  8. A cigarette as in Claim 5, characterized in that
       a number of tubes (16') are arranged in the region of the centre of the first chamber (2).
  9. A cigarette as in Claim 6, characterized in that
       the peripheral channels (16') extend in a straight line in the direction longitudinal to the third chamber (6).
  10. A cigarette as in Claim 6, characterized in that
       the peripheral channels (16') run helically in the direction longitudinal to the third chamber (6).
  11. A cigarette as In Claim 2 or 5, characterized in that
       the filter material (32, 42) surrounding the core (34, 44) of the third chamber (6), which is impermeable to air, is formed from corrugated foil of cellulose acetate or other rottable material.
EP19930250046 1992-02-25 1993-02-10 Ventilated cigarette filter Expired - Lifetime EP0558166B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE4205658 1992-02-25
DE19924205658 DE4205658A1 (en) 1992-02-25 1992-02-25 ventilated filter

Publications (3)

Publication Number Publication Date
EP0558166A2 EP0558166A2 (en) 1993-09-01
EP0558166A3 EP0558166A3 (en) 1994-11-23
EP0558166B1 true EP0558166B1 (en) 1998-06-03

Family

ID=6452474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930250046 Expired - Lifetime EP0558166B1 (en) 1992-02-25 1993-02-10 Ventilated cigarette filter

Country Status (13)

Country Link
US (1) US5423336A (en)
EP (1) EP0558166B1 (en)
JP (1) JP3023037B2 (en)
AT (1) AT166768T (en)
CA (1) CA2090090A1 (en)
CZ (1) CZ284707B6 (en)
DE (2) DE4205658A1 (en)
DK (1) DK0558166T3 (en)
ES (1) ES2117092T3 (en)
HU (1) HU217452B (en)
PL (1) PL169754B1 (en)
SI (1) SI9300089B (en)
SK (1) SK279967B6 (en)

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US5979459A (en) * 1997-04-30 1999-11-09 Brown & Williamson Tobacco Corporation Ventilated filter cigarette with a coaxial filter element
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US5979459A (en) * 1997-04-30 1999-11-09 Brown & Williamson Tobacco Corporation Ventilated filter cigarette with a coaxial filter element
WO2000049901A2 (en) 1999-02-26 2000-08-31 H.F. & Ph.F.Reemtsma Gmbh Smokable product

Also Published As

Publication number Publication date
PL169754B1 (en) 1996-08-30
ES2117092T3 (en) 1998-08-01
HUT68483A (en) 1995-06-28
CZ284707B6 (en) 1999-02-17
SK279967B6 (en) 1999-06-11
HU217452B (en) 2000-01-28
SK12293A3 (en) 1993-09-09
EP0558166A2 (en) 1993-09-01
JP3023037B2 (en) 2000-03-21
CZ23593A3 (en) 1993-11-17
CA2090090A1 (en) 1993-08-26
HU9300502D0 (en) 1993-05-28
PL297678A1 (en) 1993-09-06
US5423336A (en) 1995-06-13
EP0558166A3 (en) 1994-11-23
SI9300089B (en) 2001-12-31
DE59308624D1 (en) 1998-07-09
SI9300089A (en) 1993-09-30
DE4205658A1 (en) 1993-08-26
JPH05336943A (en) 1993-12-21
AT166768T (en) 1998-06-15
DK0558166T3 (en) 1999-03-22

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