EP0321740B1 - Coaxial cigarette - Google Patents

Coaxial cigarette Download PDF

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Publication number
EP0321740B1
EP0321740B1 EP88119812A EP88119812A EP0321740B1 EP 0321740 B1 EP0321740 B1 EP 0321740B1 EP 88119812 A EP88119812 A EP 88119812A EP 88119812 A EP88119812 A EP 88119812A EP 0321740 B1 EP0321740 B1 EP 0321740B1
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EP
European Patent Office
Prior art keywords
filter
coaxial
cigarette according
wrapper
coaxial cigarette
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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.)
Expired - Lifetime
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EP88119812A
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German (de)
French (fr)
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EP0321740A1 (en
Inventor
Horst Borowski
Erwin Dipl.-Chem. Dr. Kausch
Erhard Dipl.-Ing. Dr. Rittershaus
Gert Dipl.-Chem. Dr. Rudolph
Werner Dipl.-Phys. Dr. Schneider
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British American Tobacco Germany GmbH
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British American Tobacco Germany GmbH
BAT Cigarettenfabriken GmbH
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Publication of EP0321740A1 publication Critical patent/EP0321740A1/en
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure

Definitions

  • the invention relates to a coaxial cigarette of the type specified in the preamble of claim 1.
  • coaxial smokable articles in particular coaxial cigars or cigarettes with an inner core which is surrounded by a jacket made of tobacco material.
  • the basic principle of such a coaxial cigarette is known for example from FR-PS 998556, the inner core consisting of a tobacco of lower quality, which is surrounded by an annular jacket made of tobacco of high quality. This allows savings to be made in terms of the cost of the tobacco materials used.
  • a coaxial cigarette of the type specified is known from DE-A-3602846 and has an inner core made of a residue-free glowing Material, a covering for the inner core, an outer casing coaxially surrounding the inner core made of a tobacco and / or non-tobacco material, and a casing for the outer casing.
  • the particular advantage of this coaxial cigarette is that it can be manufactured using customary manufacturing techniques on specially modified rod machines.
  • US-A-3356094 discloses a coaxial cigarette with an inner hollow tube and an aerosol chamber with a narrow outlet; however, the production of this coaxial cigarette is very complex and therefore expensive; In addition, the different components are separated from each other, so that there is an unusual smoking pattern.
  • a coaxial cigarette is known from DE-A-2620335, which has a strand part with an inner core and an outer jacket.
  • a filter part is attached to the strand part, in which partitions are provided.
  • the interior, which is enclosed by the partitions within the filter part, is arranged in connection with the inner core, but is additionally connected to the outer jacket.
  • the outer jacket is filled with a tobacco material, while the inner core of the known coaxial cigarette is hollow.
  • the invention has for its object to provide a coaxial cigarette of the type specified, in which the unwanted smoke components can be almost completely intercepted.
  • the advantages achieved by the invention are based on the fact that combustion products of the strand part in the ring-shaped outer jacket and separated from the inner core during a train in the train phase are guided axially through the coaxial cigarette and absorbed by a special coaxial filter;
  • This coaxial filter treats the peripheral smoke flowing through its filter jacket and the central smoke flowing through its filter core in very different ways, which are matched to the two types of smoke, so that there is an optimal filter effect.
  • the gas phase of the smoke is reduced by diffusion and ventilation, while the particle phase is reduced by ventilation and is simultaneously absorbed by a high-performance filter segment.
  • Both the tobacco rod and the coaxial filter of this coaxial cigarette can be produced using existing technologies which are known in principle from the prior art, so that only corresponding modifications to the current machines are required.
  • the smoke produced and absorbed by the smoker is acceptable in terms of taste and contains only a little condensate, which is also largely free of the usual combustion products; the smoking process itself is not changed, so that the "smoking experience" for the smoker can also be maintained.
  • the coaxial cigarette which is generally indicated by reference number 10, has a strand part 12, to which a coaxial filter 15 is attached with the usual manufacturing techniques.
  • the strand part 12 contains an inner core 14 with a sheath 16 and an outer core 18 with a sheath 20.
  • the coaxial filter 15 consists of a filter core 22 with a casing 24 and a filter jacket 26 with a casing 28.
  • the coaxial filter 15 is ventilated, as will be explained later; the ventilation means is indicated as a line of punctiform ventilation openings 30 which extend over the circumference of the coaxial filter 15.
  • the inner core 14 of the strand part 12 has a diameter of 3 to 5 mm, while the diameter of the outer jacket 18 of the strand part 12 is a maximum of 8 mm, so that this strand part 12 corresponds approximately to the usual diameter of "normal" cigarettes.
  • the inner core 14 consists of a porous carrier substance with a high absorption capacity for the combination of flavoring and / or flavoring substances, also known as "casing", which are generally present in solvents and contain sugar, humectants and similar substances; it is also spoken of “sauce”; this "casing" is added to the tobacco material before cutting.
  • casing a porous carrier substance with a high absorption capacity for the combination of flavoring and / or flavoring substances
  • the absorption capacity for "casing" should be greater than 3% by weight.
  • a preferred carrier is tobacco material, e.g. Cut tobacco, tobacco foil or extruded tobacco; however, thermally decomposable non-tobacco materials can also be used. It is important that the carrier substance of the inner core 14 burns up largely without residue.
  • the inner core 14 contains tobacco material, it must have a high aroma content and / or a high condensate potential and a low carbon monoxide potential.
  • Cigarette paper is particularly suitable as wrapping 16, and expediently a cigarette paper that consists at least partially of tobacco raw material.
  • the sheath 16 of the inner core 14 can also be produced from tobacco films or other natural material films.
  • the outer jacket 18 of the strand part 12 consists of tobacco materials and / or non-tobacco materials with a low condensate potential and with a high filling capacity with a packing density of at most 220 mg / ml.
  • the inner casing 16 of the inner core 14 and the outer casing 20 of the outer casing 18 of the strand part 12 are treated with generally different glow salts and glow salt concentrations as additives, either uniformly over their entire area or as a glow salt pattern; a specific glow salt or a mixture of several different glow salts can be used in each case.
  • the amount of glow salt for the inner casing 16 or outer casing 20 must be adjusted so that a total glow rate results for the inner core 14 and outer casing 18, which ensures a sufficient uniform mass conversion for the inner core 14 and outer casing 18 of the strand part 12. In particular, it must be ruled out that cavities or similar defects arise due to locally high glow speeds.
  • the tensile resistance of the inner core 14 of the strand part 12 must be lower than the tensile resistance of the outer jacket 18 of the tobacco rod 12.
  • the outer diameter of the coaxial filter 15 corresponds to the outer diameter of the strand part 12, that is, is a maximum of 8 mm.
  • the diameter of the filter core 22 corresponds approximately to the diameter of the inner core 14 of the strand part, but should, according to a preferred embodiment, be approximately 0.1 to 1 mm smaller than this, as indicated in the figure, in order in this way to rule out smoke from the Outer jacket 18 can get into the filter core 22.
  • the coaxial filter 15 is ventilated and has a degree of ventilation of 50 to 80%.
  • a highly porous wrapping and highly porous covering paper with an additional, laser-perforated ventilation zone 30 is used as the outer covering 28, at least through the covering paper. If, as shown, the ventilation zone is formed by a line of punctiform ventilation openings 30 running in the circumferential direction, the line of the openings 30 should have a distance of at least 10 mm from the mouth end of the coaxial filter 15.
  • the length of the coaxial filter 15 should be in the range of 21 to 30 mm. Accordingly, the ventilation zone 30 would be at least 9 mm away from the end face of the coaxial filter 15 facing the strand part 12, the aim being to keep the smallest possible distance from the end face on the mouth side.
  • the cover 28 of the filter jacket 26 is porous and consists of a cover and a covering paper.
  • the topping paper should have a porosity of more than 5000 CU and the wrapping paper should have a porosity of more than 10000 CU.
  • Suitable materials for the two filter zones are the customary filter materials as are currently used in the cigarette industry.
  • the filter core 22 can consist of porous carrier materials with a large specific surface area, in particular foamed, extruded, sintered, pressed or molded materials such as, for example, coal, tobacco or non-tobacco materials.
  • the filter jacket 26 again consists of the usual filter materials.
  • the carrier materials for the filter core 22 should contain additives, namely once the usual additives, such as triacetin, flavor or aroma substances and / or largely neutral taste substances with a high transfer coefficient into the core smoke.
  • the filter core 22 is surrounded by an air-impermeable covering 24, which can consist, for example, of non-porous filter paper.
  • the ratio of the specific tensile resistances of the filter jacket 26 to that of the filter core 22 is “measured closed”, that is to say without taking ventilation into account, at least 1.4.
  • the peripheral filter jacket 26, based on the peripheral smoke flow, together with the ventilation via the ventilation openings 30, has a degree of reduction of at least 90%; and the filter core 22 has a filter efficiency of at most 40%, based on the core smoke.
  • combustion products thus arise both in the inner core 14 and in the outer jacket 18 of the strand part 12.
  • the combustion products essentially only come from the outer jacket 18 of the strand part 12, so that almost all combustion products guided on separate tracks, passed through the coaxial filter 15 and can thereby be influenced in a targeted manner so that there is little condensate without impairing the taste, which is largely free of the usual combustion products.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Description

Die Erfindung betrifft eine Koaxialcigarette der im Oberbegriff des Anspruchs 1 angegebenen Gattung.The invention relates to a coaxial cigarette of the type specified in the preamble of claim 1.

Es gibt eine Reihe von Veröffentlichungen über sogenannte "koaxiale rauchbare Artikel", also insbesondere Koaxial-Cigarren oder -Cigaretten mit einem Innenkern, der durch einen Mantel aus Tabakmaterial umgeben ist. Das Grundprinzip einer solchen Koaxialcigarette ist beispielsweise aus der FR-PS 998556 bekannt, wobei der Innenkern aus einem Tabak geringerer Qualität besteht, der von einem ringförmigen Mantel aus Tabak hoher Qualität umgeben ist. Dadurch lassen sich Einsparungen in Bezug auf die Kosten der verwendeten Tabakmaterialien erzielen.There are a number of publications on so-called "coaxial smokable articles", in particular coaxial cigars or cigarettes with an inner core which is surrounded by a jacket made of tobacco material. The basic principle of such a coaxial cigarette is known for example from FR-PS 998556, the inner core consisting of a tobacco of lower quality, which is surrounded by an annular jacket made of tobacco of high quality. This allows savings to be made in terms of the cost of the tobacco materials used.

Weitere Ausgestaltungen solcher Koaxialcigaretten gehen aus der FR-C-1322254, der US-A-3614956, der US-A-4219031, der GB-A-2070409 und der GB-A-1086443 hervor.Further configurations of such coaxial cigarettes can be found in FR-C-1322254, US-A-3614956, US-A-4219031, GB-A-2070409 and GB-A-1086443.

Eine Koaxialcigarette der angegebenen Gattung ist aus der DE-A-3602846 bekannt und weist einen Innenkern aus einem rückstandsfrei verglimmenden Material, eine Umhüllung für den Innenkern, einen den Innenkern koaxial umgebenden Außenmantel aus einem Tabak- und/oder Nichttabakmaterial, sowie eine Umhüllung für den Außenmantel auf. Der besondere Vorteil dieser Koaxialcigarette liegt darin, daß sie mit den üblichen Fertigungstechniken auf speziell modifizierten Strangmaschinen hergestellt werden kann.A coaxial cigarette of the type specified is known from DE-A-3602846 and has an inner core made of a residue-free glowing Material, a covering for the inner core, an outer casing coaxially surrounding the inner core made of a tobacco and / or non-tobacco material, and a casing for the outer casing. The particular advantage of this coaxial cigarette is that it can be manufactured using customary manufacturing techniques on specially modified rod machines.

Nachteilig ist jedoch, daß bei dieser Koaxialcigarette kein Filter vorgesehen ist, um die unerwünschten Rauchbestandteile abzufangen.It is disadvantageous, however, that no filter is provided in this coaxial cigarette in order to intercept the undesirable smoke components.

Aus der US-A-3356094 geht eine Koaxialcigarette mit einem inneren Hohlrohr und einer Aerosol-Kammer mit engem Außlaß hervor; die Herstellung dieser Koaxialcigarette ist jedoch sehr aufwendig und damit kostspielig; außerdem werden die verschiedenen Bestandteile voneinander getrennt, so daß sich ein ungewöhnliches Rauchmuster ergibt.US-A-3356094 discloses a coaxial cigarette with an inner hollow tube and an aerosol chamber with a narrow outlet; however, the production of this coaxial cigarette is very complex and therefore expensive; In addition, the different components are separated from each other, so that there is an unusual smoking pattern.

Letztlich ist aus der DE-A-2620335 eine Koaxialcigarette bekannt, die ein Strangteil mit einem Innenkern und einem Außenmantel aufweist. Mundseitig ist an dieser bekannten Koaxialcigarette ein Filterteil an dem Strangteil angesetzt, in dem Trennwände vorgesehen sind. Der Innenraum, der durch die Trennwände innerhalb des Filterteils eingeschlossen ist, ist im Anschluß an den Innenkern angeordnet, ist jedoch zusätzlich an den Außenmantel angeschlossen. Der Außenmantel ist mit einem Tabakmaterial gefüllt, während der Innenkern der bekannten Koaxialcigarette hohl ist. Zwar soll diese bekannte Koaxialcigarette das Problem lösen, den Kondensatgehalt zu erniedrigen, allerdings wird durch die Ausgestaltung dieser bekannten Koaxialcigarette die Geschmacksintensität derart vermindert, daß ein Raucher bereits nach kurzer Zeit wieder auf die herkömmlichen Cigaretten zurückgreifen wird. Außerdem werden bei der gattungsgemäßen Koaxialcigarette die unerwünschten Rauchbestandteile lediglich verdünnt, wobei gleichzeitig das Geschmackserlebnis für den Raucher beeinträchtigt wird.Ultimately, a coaxial cigarette is known from DE-A-2620335, which has a strand part with an inner core and an outer jacket. On the mouth side of this known coaxial cigarette, a filter part is attached to the strand part, in which partitions are provided. The interior, which is enclosed by the partitions within the filter part, is arranged in connection with the inner core, but is additionally connected to the outer jacket. The outer jacket is filled with a tobacco material, while the inner core of the known coaxial cigarette is hollow. Although this known coaxial cigarette is intended to solve the problem of lowering the condensate content, the design of this known coaxial cigarette reduces the taste intensity to such an extent that a smoker will fall back on the conventional cigarettes after a short time. In addition, the undesirable smoke components are only diluted in the generic coaxial cigarette, at the same time the taste experience for the smoker is impaired.

Der Erfindung liegt die Aufgabe zugrunde, eine Koaxialcigarette der angegebenen Gattung zu schaffen, bei der die unerwünschten Rauchbestandteile nahezu vollständig abgefangen werden können.The invention has for its object to provide a coaxial cigarette of the type specified, in which the unwanted smoke components can be almost completely intercepted.

Dies wird erfindungsgemäß durch die im Anspruch 1 angegebenen Merkmale erreicht.This is achieved according to the invention by the features specified in claim 1.

Zweckmäßige Ausführungsformen werden durch die Merkmale der Unteransprüche definiert.Expedient embodiments are defined by the features of the subclaims.

Die mit der Erfindung erzielten Vorteile beruhen darauf, daß während eines Zuges in der Zugphase entstehende Verbrennungsprodukte des Strangteils im ringförmigen Außenmantel und getrennt vom Innenkern axial durch die Koaxialcigarette geführt und durch einen speziellen Koaxialfilter absorbiert werden; dieser Koaxialfilter behandelt den peripheren, seinen Filtermantel durchströmenden Rauch und den zentralen, seinen Filterkern durchströmenden Rauch in sehr unterschiedlicher, auf die beiden Raucharten abgestimmten Weise, so daß sich eine optimale Filterwirkung ergibt.The advantages achieved by the invention are based on the fact that combustion products of the strand part in the ring-shaped outer jacket and separated from the inner core during a train in the train phase are guided axially through the coaxial cigarette and absorbed by a special coaxial filter; This coaxial filter treats the peripheral smoke flowing through its filter jacket and the central smoke flowing through its filter core in very different ways, which are matched to the two types of smoke, so that there is an optimal filter effect.

Dabei wird speziell die Gasphase des Rauches durch Diffusion und Ventilation reduziert, während die Partikelphase durch Ventilation reduziert und gleichzeitig durch ein Hochleistungsfiltersegment absorbiert wird.Specifically, the gas phase of the smoke is reduced by diffusion and ventilation, while the particle phase is reduced by ventilation and is simultaneously absorbed by a high-performance filter segment.

Sowohl der Tabakstrang als auch der Koaxialfilter dieser Koaxialcigarette können mit vorhandenen und aus dem Stand der Technik im Prinzip bekannten Technologien hergestellt werden, so daß nur entsprechende Modifikationen an den derzeitigen Maschinen erforderlich sind.Both the tobacco rod and the coaxial filter of this coaxial cigarette can be produced using existing technologies which are known in principle from the prior art, so that only corresponding modifications to the current machines are required.

Der entstehende und von dem Raucher aufgenommene Rauch ist geschmacklich akzeptabel und enthält nur wenig Kondensat, das zudem weitgehend frei von den sonst üblichen Verbrennungsprodukten ist; der Rauchvorgang selbst wird nicht verändert, so daß auch das "Raucherlebnis" für den Raucher beibehalten werden kann.The smoke produced and absorbed by the smoker is acceptable in terms of taste and contains only a little condensate, which is also largely free of the usual combustion products; the smoking process itself is not changed, so that the "smoking experience" for the smoker can also be maintained.

Dabei wird die Tatsache ausgenutzt, daß während der Zugphase die Verbrennungsprodukte im wesentlichen nur aus der Peripherie, also dem Mantelbereich einer Cigarette stammen, so daß man hier gezielt entsprechende Maßnahmen einleiten kann, um die unerwünschten Rauchprodukte abzufangen. Außerdem kann nun konsequent ein optimierter Tabakstrang mit einem optimierten Zweistrom-Filter kombiniert werden, um den gewünschten Geschmack in Verbindung mit der weitgehenden Reduzierung der unerwünschten Rauchbestandteile zu erzielen.This takes advantage of the fact that during the pull phase, the combustion products essentially only come from the periphery, that is to say the jacket area of a cigarette, so that appropriate measures can be taken to intercept the unwanted smoke products. In addition, an optimized tobacco rod can now be consistently combined with an optimized two-flow filter in order to achieve the desired taste in connection with the extensive reduction of unwanted smoke components.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die beiliegende, schematische Zeichnung näher erläutert, deren einzige Figur einen axialen Schnitt durch eine Koaxialcigarette zeigt.The invention is explained in more detail below on the basis of exemplary embodiments with reference to the accompanying schematic drawing, the single figure of which shows an axial section through a coaxial cigarette.

Die allgemein durch das Bezugszeichen 10 angedeutete Koaxialcigarette weist einen Strangteil 12 auf, an den mit den üblichen Fertigungstechniken ein Koaxialfilter 15 angesetzt ist. Der Strangteil 12 enthält einen Innenkern 14 mit einer Umhüllung 16 sowie einen Außenkern 18 mit einer Umhüllung 20.The coaxial cigarette, which is generally indicated by reference number 10, has a strand part 12, to which a coaxial filter 15 is attached with the usual manufacturing techniques. The strand part 12 contains an inner core 14 with a sheath 16 and an outer core 18 with a sheath 20.

In ähnlicher Weise besteht der Koaxialfilter 15 aus einem Filterkern 22 mit einer Umhüllung 24 und einem Filtermantel 26 mit einer Umhüllung 28.Similarly, the coaxial filter 15 consists of a filter core 22 with a casing 24 and a filter jacket 26 with a casing 28.

Der Koaxialfilter 15 ist ventiliert, wie noch erläutert werden soll; das Ventilationsmittel ist als Linie von punktförmigen Ventilationsöffnungen 30 angedeutet, die sich über den Umfang des Koaxialfilters 15 erstrecken.The coaxial filter 15 is ventilated, as will be explained later; the ventilation means is indicated as a line of punctiform ventilation openings 30 which extend over the circumference of the coaxial filter 15.

Der Innenkern 14 des Strangteils 12 hat einen Durchmesser von 3 bis 5 mm, während der Durchmesser des Außenmantels 18 des Strangteils 12 maximal 8 mm beträgt, so daß dieser Strangteil 12 etwa dem üblichen Durchmesser "normaler" Cigaretten entspricht.The inner core 14 of the strand part 12 has a diameter of 3 to 5 mm, while the diameter of the outer jacket 18 of the strand part 12 is a maximum of 8 mm, so that this strand part 12 corresponds approximately to the usual diameter of "normal" cigarettes.

Der Innenkern 14 besteht aus einer porösen Trägersubstanz mit hoher Aufnahmefähigkeit für die auch als "Casing" bezeichnete Kombination von Aroma- und/oder Flavour-Stoffen, die im allgemeinen in Lösungsmitteln vorliegen und Zucker, Feuchthaltemittel und ähnliche Substanzen enthalten; es wird auch von "Soßieren" gesprochen; dieses "Casing" wird dem Tabakmaterial vor dem Schneiden zugesetzt.The inner core 14 consists of a porous carrier substance with a high absorption capacity for the combination of flavoring and / or flavoring substances, also known as "casing", which are generally present in solvents and contain sugar, humectants and similar substances; it is also spoken of "sauce"; this "casing" is added to the tobacco material before cutting.

Bezogen auf die Trägersubstanz soll die Aufnahmefähigkeit für "Casing" größer als 3 Gew.-%-Zugabe sein.Based on the carrier substance, the absorption capacity for "casing" should be greater than 3% by weight.

Eine bevorzugte Trägersubstanz ist Tabakmaterial, z.B. Schnittabak, Tabakfolie oder extrudierter Tabak; es kommen aber auch thermisch zersetzbare Nicht-Tabakmaterialien in Frage. Wichtig ist, daß die Trägersubstanz des Innenkerns 14 weitgehend rückstandsfrei verglimmt.A preferred carrier is tobacco material, e.g. Cut tobacco, tobacco foil or extruded tobacco; however, thermally decomposable non-tobacco materials can also be used. It is important that the carrier substance of the inner core 14 burns up largely without residue.

Die entstehenden Rückstände sollten winzig sein; es besteht deshalb die Möglichkeit, der Trägersubstanz des Innenkerns 14 Glasfasern oder andere Mineral-Fasern zuzusetzen, um hier bereits eine gewisse Filterwirkung zu erzeugen.The residues that arise should be tiny; there is therefore the possibility of adding glass fibers or other mineral fibers to the carrier substance of the inner core 14 in order to already produce a certain filter effect here.

Falls der Innenkern 14 Tabakmaterial enthält, muß dieses einen hohen Aromagehalt und/oder ein hohes Kondensatpotential sowie ein niedriges Kohlenmonoxid-Potential haben.If the inner core 14 contains tobacco material, it must have a high aroma content and / or a high condensate potential and a low carbon monoxide potential.

Die Umhüllung 16 des Innenkerns 14 des Strangteils 12 hat eine vergleichsweise geringe Porösität. Als Umhüllung 16 kommt insbesondere Cigarettenpapier in Frage, und zwar zweckmäßigerweise ein Cigarettenpapier, das zumindest teilweise aus Tabakrohstoff besteht.The sheath 16 of the inner core 14 of the strand part 12 has a comparatively low porosity. Cigarette paper is particularly suitable as wrapping 16, and expediently a cigarette paper that consists at least partially of tobacco raw material.

Als Alternative kann die Umhüllung 16 des Innenkerns 14 auch aus Tabakfolien oder anderen Naturstoff-Folien hergestellt werden.As an alternative, the sheath 16 of the inner core 14 can also be produced from tobacco films or other natural material films.

Der Außenmantel 18 des Strangteils 12 besteht aus Tabakmaterialien und/oder Nicht-Tabakmaterialien mit niedrigem Kondensatpotential und mit hoher Füllfähigkeit mit einer Packungsdichte von höchstens 220 mg/ml.The outer jacket 18 of the strand part 12 consists of tobacco materials and / or non-tobacco materials with a low condensate potential and with a high filling capacity with a packing density of at most 220 mg / ml.

Als äußere Umhüllung 20 des Außenmantels 18 wird poröses Cigarettenpapier mit einer Luftdurchlässigkeit eingesetzt, die größer als 30 CU (Coresta Units = cm³/min  ×  cm²  ×  100 mm WS) ist.As an outer coating 20 of the outer shell 18 porous cigarette paper is used with an air permeability that is greater than 30 CU (C Oresta U nits = cc / min × cm² × 100 mm WS).

Wichtig ist, daß die innere Umhüllung 16 des Innenkerns 14 und die äußere Umhüllung 20 des Außenmantels 18 des Strangteils 12 mit im allgemeinen unterschiedlichen Glimmsalzen und Glimmsalz-Konzentrationen als Additiven beaufschlagt werden, und zwar entweder gleichmäßig über ihre gesamte Fläche oder als Glimmsalz-Muster; dabei kann jeweils ein bestimmtes Glimmsalz oder ein Gemisch aus mehreren unterschiedlichen Glimmsalzen eingesetzt werden.It is important that the inner casing 16 of the inner core 14 and the outer casing 20 of the outer casing 18 of the strand part 12 are treated with generally different glow salts and glow salt concentrations as additives, either uniformly over their entire area or as a glow salt pattern; a specific glow salt or a mixture of several different glow salts can be used in each case.

Die Glimmsalzmenge für die innere Umhüllung 16 bzw. äußere Umhüllung 20 muß so abgestimmt werden, daß sich insgesamt für Innenkern 14 und Außenmantel 18 eine Glimmgeschwindigkeit ergibt, die einen hinreichenden gleichförmigen Massenumsatz für Innenkern 14 und Außenmantel 18 des Strangteils 12 gewährleistet. Es muß insbesondere ausgeschlossen werden, daß wegen lokal hoher Glimmgeschwindigkeiten Hohlräume oder ähnliche Defekte entstehen.The amount of glow salt for the inner casing 16 or outer casing 20 must be adjusted so that a total glow rate results for the inner core 14 and outer casing 18, which ensures a sufficient uniform mass conversion for the inner core 14 and outer casing 18 of the strand part 12. In particular, it must be ruled out that cavities or similar defects arise due to locally high glow speeds.

Der Zugwiderstand des Innenkerns 14 des Strangteils 12 muß niedriger als der Zugwiderstand des Außenmantels 18 des Tabakstrangs 12 sein.The tensile resistance of the inner core 14 of the strand part 12 must be lower than the tensile resistance of the outer jacket 18 of the tobacco rod 12.

Der Außendurchmesser des Koaxialfilters 15 entspricht dem Außendurchmesser des Strangteils 12, d.h., beträgt maximal 8 mm.The outer diameter of the coaxial filter 15 corresponds to the outer diameter of the strand part 12, that is, is a maximum of 8 mm.

Der Durchmesser des Filterkerns 22 entspricht etwa dem Durchmesser des Innenkerns 14 des Strangteils, sollte jedoch nach einer bevorzugten Ausführungsform etwa 0,1 bis 1 mm kleiner als dieser sein, wie in der Figur angedeutet ist, um auf diese Weise auszuschließen, daß Rauch von dem Außenmantel 18 in den Filterkern 22 gelangen kann.The diameter of the filter core 22 corresponds approximately to the diameter of the inner core 14 of the strand part, but should, according to a preferred embodiment, be approximately 0.1 to 1 mm smaller than this, as indicated in the figure, in order in this way to rule out smoke from the Outer jacket 18 can get into the filter core 22.

Der Koaxialfilter 15 ist ventiliert und hat einen Ventilationsgrad von 50 bis 80%.The coaxial filter 15 is ventilated and has a degree of ventilation of 50 to 80%.

Zu diesem Zweck wird als äußere Umhüllung 28 ein hochporöses Umhüllungs- und hochporöses Belag-Papier mit zusätzlicher, laser-perforierter Ventilationszone 30 zumindest durch das Belagpapier eingesetzt. Wird die Ventilationszone, wie dargestellt, durch eine in Umfangsrichtung verlaufende Linie von punktförmigen Ventilationsöffnungen 30 gebildet, so sollte die Linie der Öffnungen 30 einen Abstand von mindestens 10 mm vom mundseitigen Ende des Koaxialfilters 15 haben.For this purpose, a highly porous wrapping and highly porous covering paper with an additional, laser-perforated ventilation zone 30 is used as the outer covering 28, at least through the covering paper. If, as shown, the ventilation zone is formed by a line of punctiform ventilation openings 30 running in the circumferential direction, the line of the openings 30 should have a distance of at least 10 mm from the mouth end of the coaxial filter 15.

Die Länge des Koaxialfilters 15 sollte im Bereich von 21 bis 30 mm liegen. Dementsprechend wäre die Ventilationszone 30 mindestens 9 mm von der dem Strangteil 12 zugewandten Stirnfläche des Koaxialfilters 15 entfernt, wobei angestrebt wird, einen möglichst kleinen Abstand zur mundseitigen Stirnfläche einzuhalten.The length of the coaxial filter 15 should be in the range of 21 to 30 mm. Accordingly, the ventilation zone 30 would be at least 9 mm away from the end face of the coaxial filter 15 facing the strand part 12, the aim being to keep the smallest possible distance from the end face on the mouth side.

Wenn der Abstand zwischen der mundseitigen Stirnfläche des Koaxialfilters 15 und der Ventilations-Zone 30 mit l₁, die Breite der Ventilationszone 30 mit Δ l, die Länge des Koaxialfilters 15 mit lF und der Abstand zwischen der Ventilationszone 30 und der dem Strangteil 12 zugewandten Stirnfläche des Koaxialfilters 15 mit l₂ bezeichnet werden, dann gilt
l F  -  l₂ = l₁ + Δ l.

Figure imgb0001

If the distance between the mouth end face of the coaxial filter 15 and the ventilation zone 30 with l₁, the width of the ventilation zone 30 with Δ l, the length of the coaxial filter 15 with l F and the distance between the ventilation zone 30 and the end face 12 facing the strand part of the coaxial filter 15 with l₂, then applies
l F - l₂ = l₁ + Δ l.
Figure imgb0001

Wie erwähnt, ist die Umhüllung 28 des Filtermantels 26 porös und besteht aus einem Umhüllungs- und einem Belagpapier. Das Belagpapier sollte eine Porösität von mehr als 5000 CU und das Umhüllungspapier eine Porösität von mehr als 10000 CU haben.As mentioned, the cover 28 of the filter jacket 26 is porous and consists of a cover and a covering paper. The topping paper should have a porosity of more than 5000 CU and the wrapping paper should have a porosity of more than 10000 CU.

Als Materialien für die beiden Filterzonen, nämlich für den Filterkern 22 und den Filtermantel 26, kommen die üblichen Filtermaterialien in Frage, wie sie derzeit in der Cigarettenindustrie eingesetzt werden.Suitable materials for the two filter zones, namely for the filter core 22 and the filter jacket 26, are the customary filter materials as are currently used in the cigarette industry.

Als Alternative hierzu kann der Filterkern 22 aus porösen Trägermaterialien mit großer spezifischer Oberfläche bestehen, insbesondere geschäumten, extrudierten, gesinterten, gepreßten oder geformten Materialien wie beispielsweise Kohle, Tabak- oder Nicht-Tabakmaterialien. Bei dieser Variante besteht der Filtermantel 26 wieder aus den üblichen Filtermaterialien.As an alternative to this, the filter core 22 can consist of porous carrier materials with a large specific surface area, in particular foamed, extruded, sintered, pressed or molded materials such as, for example, coal, tobacco or non-tobacco materials. In this variant, the filter jacket 26 again consists of the usual filter materials.

Bei beiden Varianten sollten die Trägermaterialien für den Filterkern 22 Additive enthalten, nämlich einmal die üblichen Additive, wie beispielsweise Triacetin, Flavour- bzw. Aroma-Stoffe und/oder geschmacklich weitgehend neutrale Stoffe mit hohem Transferkoeffizienten in den Kernrauch.In both variants, the carrier materials for the filter core 22 should contain additives, namely once the usual additives, such as triacetin, flavor or aroma substances and / or largely neutral taste substances with a high transfer coefficient into the core smoke.

Der Filterkern 22 ist von einer luftundurchlässigen Umhüllung 24 umgeben, die beispielsweise aus nicht porösem Filterpapier bestehen kann.The filter core 22 is surrounded by an air-impermeable covering 24, which can consist, for example, of non-porous filter paper.

Für die beiden Filterzonen 22, 26 können die folgenden Kennzahlen angegeben werden:The following key figures can be given for the two filter zones 22, 26:

Das Verhältnis der spezifischen Zugwiderstände des Filtermantels 26 zu dem des Filterkerns 22 beträgt "geschlossen gemessen", also ohne Berücksichtigung der Ventilation, mindestens 1,4.The ratio of the specific tensile resistances of the filter jacket 26 to that of the filter core 22 is “measured closed”, that is to say without taking ventilation into account, at least 1.4.

Der periphere Filtermantel 26 hat, bezogen auf den peripheren Rauchstrom, zusammen mit der Ventilation über die Ventilationsöffnungen 30 einen Reduzierungsgrad von mindestens 90%; und der Filterkern 22 hat, bezogen auf den Kernrauch, eine Filterwirksamkeit von höchstens 40%.The peripheral filter jacket 26, based on the peripheral smoke flow, together with the ventilation via the ventilation openings 30, has a degree of reduction of at least 90%; and the filter core 22 has a filter efficiency of at most 40%, based on the core smoke.

Bei der beschriebenen Koaxialcigarette 10 entstehen also Verbrennungsprodukte sowohl im Innenkern 14 als auch im Außenmantel 18 des Strangteils 12. Während eines Zuges stammen die Verbrennungsprodukte im wesentlichen nur aus dem Außenmantel 18 des Strangteils 12, so daß fast alle Verbrennungsprodukte auf getrennten Bahnen geleitet, durch den Koaxialfilter 15 geführt und dadurch gezielt so beeinflußt werden können, daß sich ohne Beeinträchtigung des Geschmacks nur wenig Kondensat ergibt, das weitgehend frei von den sonst üblichen Verbrennungsprodukten ist.In the coaxial cigarette 10 described, combustion products thus arise both in the inner core 14 and in the outer jacket 18 of the strand part 12. During a train, the combustion products essentially only come from the outer jacket 18 of the strand part 12, so that almost all combustion products guided on separate tracks, passed through the coaxial filter 15 and can thereby be influenced in a targeted manner so that there is little condensate without impairing the taste, which is largely free of the usual combustion products.

Claims (20)

1. A coaxial cigarette comprising
a) an inner core of a material which glows substantially residue-free, in particular tobacco material,
b) a wrapper for the inner core,
c) an outer jacket of a tobacco and/or non-tobacco material which coaxially surrounds the inner core or its wrapper respectively,
d) a wrapper for the outer jacket,
e) a ventilated coaxial filter (15) comprising
e1) a filter core (22), the internal diameter of which corresponds substantially to the diameter of the inner core (14), and
e2) a filter jacket (26),
f) an air-impermeable wrapper (24) for the filter core (22) characterized by the following features:
g) the filter jacket (26) has an air-permeable wrapper (28);
h) the wrapper (16) of the inner core (14) and the wrapper (20) of the outer jacket (18) are provided with glowing or burning agents; and
i) the draw resistance of the inner core (14) is lower than the draw resistance of the outer jacket (18).
2. A coaxial cigarette according to claim 1, characterized in that the ventilation of the coaxial filter (15) is 50 to 80%.
3. A coaxial cigarette according to any of claims 1 or 2, characterized in that the internal diameter of the filter core (22) is somewhat smaller than the internal diameter of the inner core (14).
4. A coaxial cigarette according to any of claims 1 to 3, characterized in that the wrapper (24) of the filter core (22) consists of an air-impermeable cigarette paper.
5. A coaxial cigarette according to any of claims 1 to 4, characterized in that the wrapper (28) of the filter jacket (26) consists of a highly porous wrapper paper and a highly porous tipping paper with an additional laser-perforated ventilation zone (30) at least through the tipping paper.
6. A coaxial cigarette according to claim 5, characterized in that the porosity of the tipping paper is at least 5000 CU and the porosity of the wrapper paper is at least 10000 CU.
7. A coaxial cigarette according to any of claims 1 to 6, characterized in that the filter core (22) consists of porous carrier materials with large specific surface area.
8. A coaxial cigarette according to claim 7, characterized in that as carrier materials foamed, extruded, sintered, pressed or molded materials are employed, for example coal, tobacco or non-tobacco materials.
9. A coaxial cigarette according to any of claims 1 to 8, characterized in that the filter materials of the filter core (22) and/or of the filter jacket (26) are provided with additives.
10. A coaxial cigarette according to any of claims 1 to 9, characterized in that the ratio of the specific draw resistances of the filter jacket (26) to that of the filter core (22) is at least 1.4 without considering ventilation.
11. A coaxial cigarette according to any of claims 1 to 10, characterized in that the filter jacket (26), with respect to the peripheral smoke stream, has a reduction rate of at least 90% together with the ventilation provided.
12. A coaxial cigarette according to any of claims 1 to 11, characterized in that the filter core (22), with respect to the core smoke, has a filter efficiency of at the most 40%.
13. A coaxial cigarette according to any of claims 1 to 12, characterized in that the inner core (14) contains a porous carrier substance with high absorbability for aroma and/or flavouring substances.
14. A coaxial cigarette according to claim 13, characterized in that as carrier substances tobacco material and/or thermally decomposable non-tobacco material is used.
15. A coaxial cigarette according to claim 14, characterized in that a tobacco material of high aroma content and/or high condensate potential and low carbon monoxide potential is used.
16. A coaxial cigarette according to any of claims 1 to 15, characterized in that the wrapper (16) of the inner core (14) is slightly porous.
17. A coaxial cigarette according to claim 16, characterized in that the wrapper (16) of the inner core (14) consists of cigarette paper, tobacco foils or other sheets or foils of natural materials.
18. A coaxial cigarette according to claim 17, characterized in that the cigarette paper contains at least partially tobacco raw material.
19. A coaxial cigarette according to any of claims 1 to 18, characterized in that the outer jacket (18) contains tobacco materials and/or non-tobacco materials of low condensate potential and high filling capacity.
20. A coaxial cigarette according to any of claims 1 to 19, characterized in that the wrapper (20) of the outer jacket (18) consists of porous cigarette paper having an air permeability of more than 30 CU.
EP88119812A 1987-12-22 1988-11-28 Coaxial cigarette Expired - Lifetime EP0321740B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3743597 1987-12-22
DE3743597A DE3743597C1 (en) 1987-12-22 1987-12-22 Coaxial cigarette
SG69594A SG69594G (en) 1987-12-22 1994-05-28 Coaxial cigarette

Publications (2)

Publication Number Publication Date
EP0321740A1 EP0321740A1 (en) 1989-06-28
EP0321740B1 true EP0321740B1 (en) 1991-08-21

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ID=25863097

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EP88119812A Expired - Lifetime EP0321740B1 (en) 1987-12-22 1988-11-28 Coaxial cigarette

Country Status (7)

Country Link
US (1) US4874004A (en)
EP (1) EP0321740B1 (en)
JP (1) JPH0785709B2 (en)
CA (1) CA1299958C (en)
DE (2) DE3743597C1 (en)
HK (1) HK101594A (en)
SG (1) SG69594G (en)

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Also Published As

Publication number Publication date
HK101594A (en) 1994-09-30
JPH01265877A (en) 1989-10-23
SG69594G (en) 1995-03-17
DE3864396D1 (en) 1991-09-26
JPH0785709B2 (en) 1995-09-20
CA1299958C (en) 1992-05-05
EP0321740A1 (en) 1989-06-28
US4874004A (en) 1989-10-17
DE3743597C1 (en) 1989-02-16

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