EP0255114A1 - Filter cigarette - Google Patents

Filter cigarette Download PDF

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Publication number
EP0255114A1
EP0255114A1 EP87110936A EP87110936A EP0255114A1 EP 0255114 A1 EP0255114 A1 EP 0255114A1 EP 87110936 A EP87110936 A EP 87110936A EP 87110936 A EP87110936 A EP 87110936A EP 0255114 A1 EP0255114 A1 EP 0255114A1
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EP
European Patent Office
Prior art keywords
filter
tobacco rod
filter element
cigarette
hollow chamber
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.)
Granted
Application number
EP87110936A
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German (de)
French (fr)
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EP0255114B1 (en
Inventor
Paul-Georg Dr. Dipl.-Chem. Henning
Werner Dr. Dipl.-Phys. Schneider
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.)
British American Tobacco Germany GmbH
Original Assignee
British American Tobacco Germany GmbH
BAT Cigarettenfabriken GmbH
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Application filed by British American Tobacco Germany GmbH, BAT Cigarettenfabriken GmbH filed Critical British American Tobacco Germany GmbH
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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
    • 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
    • A24D3/043—Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution
    • 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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives

Definitions

  • the invention relates to a filter cigarette of the type specified in the preamble of claim 1.
  • Such a filter cigarette is known from the embodiment according to FIG. 3 of EP-OS 101 173 and has a total of four main parts, namely a tobacco rod surrounded by a cigarette paper, a first filter element on the tobacco rod side, a second filter element on the mouth side and one between the two filter elements arranged hollow chamber.
  • the two filter elements and the hollow chamber are surrounded by wrapping paper; an air-impermeable covering paper surrounds the two filter elements and the hollow chamber and serves to fasten the filter to the tobacco rod;
  • a ventilation zone is formed in the covering paper and the covering.
  • the tobacco rod-side filter part effects the major part of the filter effect, namely in the range of 80 to 90% or more, and therefore consists of a tow material with a small single denier and a large total denier, while the Filter effect of the mouth-side filter element is relatively small.
  • the ventilation air enters the hollow chamber through the ventilation zone and is mixed there with the smoke flow, which has already been heavily filtered by the filter element on the tobacco rod side. This mixture then flows through the second, mouth-side filter element, which has only a relatively low filter effect, and from there reaches the smoker's mouth.
  • This structure is said to result in improved taste properties which can be attributed to the fact that the majority of the components of the smoke which influence the taste reach the mouth of the smoker, while the nicotine / condensate ratio is relatively high.
  • Such a filter cigarette provides a significantly more intense taste impression than according to DIN values, i.e. in terms of condensate and nicotine, same filter cigarettes with a ventilated cellulose acetate single filter or with a ventilated double filter without a mixing chamber.
  • the mixing or mixing of smoke and ventilation air in the hollow or mixing chamber does not produce a typical smoke pattern on the mouth side of the second filter element.
  • Smoking tests have shown that such patterns are undesirable; conventionally ventilated filters are a "white ring", which is formed by the ventilation air enveloping the smoke is, as well as other patterns with separate guidance of air and smoke to the mouth end of the filter outlet as well as "star-shaped patterns” with ventilation through a few large perforation holes.
  • Other smoke patterns have also been observed and criticized.
  • the invention is therefore based on the object of providing a filter cigarette of the type specified, in which the disadvantages mentioned above do not occur.
  • a filter cigarette which, while maintaining the advantages of the known filter cigarette, ensures a better taste impression without increasing the nicotine / condensate ratio above 1.0.
  • the advantages achieved with the invention are based on the design a special filter cigarette construction with adaptation of the essential parameters, namely the specifications of the tobacco rod and the dimensions and properties of the two filter elements and the mixing chamber, in the direction of an overall construction that optimizes the taste impression on the one hand and the condensate yield on the other.
  • the nicotine yield of the filter cigarette should be up to a maximum of 0.8 mg and the condensate yield of 1 to 8 mg, while maintaining a nicotine / condensate ratio of at most 1.0.
  • the desired, low packing density of the tobacco mixture of the tobacco rod should be in the range of 200 to 230 mg / ml.
  • the pull resistance of the tobacco rod should be as low as possible, i. that is, in the range of 45 to 65 mm WS. measured closed, in order to achieve the desired taste in cooperation with the triple filter.
  • the total length of the filter should be between 20 and 30 mm, where Similar to conventional filters, also for reasons of simplification of manufacture due to the use of the existing machines, a total length of 21 mm with a diameter of 7.95 mm is preferred.
  • the degree of ventilation of this filter should be between 50 and 80%; it can be adjusted by the appropriate design of the ventilation zone in the covering paper and the covering over the hollow chamber;
  • the ventilation zone is formed by a row of holes which is at least 10 mm from the mouth end of the filter; the holes can either be produced by laser radiation or mechanically on the finished cigarette and should be as large as possible. 1 to 30 holes can be used, with good results being achieved with 15 to 25 holes in the ventilation line.
  • the more intense taste impression can only be recorded if the two stacked filter papers, i.e. the air-impermeable or air-impermeable wrapping paper and the air-impermeable covering paper, are perforated together mechanically or with laser beams on the finished cigarette, with laser perforation being preferred.
  • the two filter elements should be at least 7 mm long and the hollow chamber 2 to 6 mm long.
  • the corresponding division takes into account the total length of this filter.
  • the first filter element on the takak strand should have a retention capacity of 60 to 80% and should consist of a cellulose acetate filter material with a Y cross-section and the lowest possible individual denier in the range from 1.5 to 2.5 dpf (denier per filament) in order to desired to achieve the highest possible retention; the total denier of this first filter element should be high, namely greater than 60,000 be
  • the second, mouth-side filter element also contains cellulose acetate filter material, but from fibers that are as coarse as possible, i. that is, with a relatively high single denier on the order of 8 to 12 dpf.
  • the cross-sectional shape only plays a secondary role, i. that is, fibers with a round but also with a Y cross section can be used.
  • a relatively low total denier of 20,000 to 40,000 is aimed for.
  • the second filter element receives a retention performance between 0 and 10%, the limit value "zero" being expressly excluded, i. that is, the second filter element should in any case have a filtering effect, albeit a little.
  • the filter cigarette indicated generally by reference number 10, has a tobacco rod 12 surrounded by cigarette paper 11 and a filter 14 connected to the tobacco rod 12.
  • the packing density of the tobacco mixture of the tobacco rod 12 is low and is between 200 and 230 mg / ml.
  • the tensile resistance of the strand is also as low as possible and is between 45 and 65 mm WS, ge closed measured.
  • the cigarette paper 11 has a low to medium air permeability in the range of 15 to 40 Coresta units
  • the strand yield ratio nicotine / condensate of the tobacco mixture should be between 0.5 and 0.75.
  • the filter 14 consists of three separate parts, namely a first filter element 16 on the tobacco rod side, a second filter element 18 on the mouth side and a hollow chamber 20 formed between the two filter elements 16 and 18.
  • the two filter elements 16, 18 and the hollow chamber 20 are made of a wrapping paper 22 surrounded, which is air-impermeable in the illustrated embodiment.
  • the length of the wrapping paper 22 corresponds to the total length of the filter, that is to say the longitudinal dimensions of the two filter elements 16 and 18 and the hollow chamber 20.
  • An air-impermeable covering paper 24 surrounds the wrapping paper 22 and serves to fasten the actual "filter tips" made of the two filter elements 16, 18 and the hollow chamber 20 and the wrapping paper 22 to the tobacco rod 12, i. that is, the covering paper 24 extends somewhat over the tobacco rod 12, as can be seen from the figure.
  • Vent openings 26 are formed in the wrapping paper 22 as well as in the covering paper 24, which are shown by dots in the figure are indicated.
  • These ventilation openings can be made mechanically or by laser perforation.
  • the wrapping paper 22 can also be permeable to air, but in any case it is necessary that the ventilation perforations created on the finished cigarette pass through both papers.
  • the ventilation openings 26 are arranged in a cross-sectional plane of the hollow chamber 20, i. that is, when the two papers 22, 24 are processed, they lie on one line.
  • the smoke flow indicated by the arrow flows from the tobacco rod 12 into the first filter element 16, which has a very high retention rate of 60 to 80% and a length of at least 7 mm.
  • This high retention rate can be achieved by using a cellulose acetate filter material with the lowest possible individual denier in the range from 1.5 to 2.5 dpf (denier per filament) with a Y cross-section; the total denier of the first filter element 16 is high and in any case greater than 60,000.
  • the non-retained part of the smoke flow flows from the first filter element 16 into the hollow chamber 20, into which ventilation air is sucked in via the ventilation openings 26 and mixed there with the smoke flow.
  • the hollow chamber should have a length of 2 to 6 mm and ensure a degree of ventilation of 50 to 80%, through one to thirty holes, in particular fifteen to twenty-five Holes 26 is reached, the individual holes 26 should be as large as possible.
  • the mixture of smoke flow / ventilation air flows from the hollow chamber 20 into the second filter element 18, which likewise contains cellulose acetate filter material, but with fibers that are as coarse as possible, namely with a high individual denier in the order of 8 to 12 dpf.
  • the total denier of the second filter element 18 is relatively low and is in the range from 20,000 to 40,000. This allows a retention rate of 0 to 10% to be set.
  • the second filter element 18 should be at least 7 mm long, the division of the different partial lengths into the first filter element 16, the hollow chamber 20 and the second filter element 18 taking into account a total length of the filter 14 of 20 to 30 mm.
  • the stuffing density of the tobacco mixture of the tobacco rod 12 was 225 mg / ml, its strand tensile resistance 55 mm WS and the strand yield ratio nicotine / condensate 0.55.
  • the air permeability of the cigarette paper 11 was 25 Coresta units.
  • the total length of the filter 14 was 21 mm and its diameter 7.95 mm, so that this filter 14 could be processed on the usual filter manufacturing and attachment machines.
  • the first filter element 16 on the tobacco rod side had a length of 7 mm and consisted of cellulose acetate, produced from two filter tows with a Y cross section and a single denier of 2.1 dpf; each tow had a total denier of 36,000, so that the effective total denier of the filter element 16 can be set at 72,000.
  • the tensile resistance of the filter element 16 was 115 mm water column when the measurement was closed; the effective retention rate for the condensate including water was 65%.
  • the hollow chamber 20 had a length of 5 mm.
  • the second filter element 18 had a length of 9 mm and also consisted of cellulose acetate with a single denier of 8 dpf and a total denier of 28,000. Y-section fibers were also used here.
  • the effective degree of retention of the second filter element 18 was 3% and its tensile resistance was 9 mm WS, measured closed.
  • the wrapping paper 22 had a length of 21 mm, ie extended over the entire length of the filter 14. It consists of an air and smoke-impermeable material, namely a coated paper or an art film.
  • the topping paper 24 had a width of 29 mm, measured from the mouth end of the filter 14 to the boundary line of the topping paper 24 on the tobacco rod 12. It was also made of an air and smoke-impermeable material.
  • the two papers 22, 24 were provided by laser perforation online on the finished cigarette in the manufacture of cigarettes with a series of ventilation openings 26 which run in the circumferential direction of the filter element 14 and are located in the middle of the hollow chamber 20.
  • a degree of ventilation of 64% was set by appropriately designing the number and size of the ventilation openings 26 in the covering paper 24 and wrapping paper 22.
  • the following standard smoke cigarette smoke values resulted according to DIN: Condensate: 4mg; Nicotine: 0.3 mg, that is, the nicotine / condensate ratio was 0.75.
  • a degree of ventilation of 72% was set by appropriately designing the number and size of the ventilation openings 26 in the wrapping paper 22 and the covering paper 24.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

1. A filter cigarette with a nicotine-to-condensate ratio of 1.0 at the maximum, comprising a) a tobacco rod surrounded by a cigarette paper, b) a first filter element facing the tobacco rod and consisting of a fibrous material having a low single denier, a high total denier and an appropriately high retention capacity, c) a second filter element facing the mouth of the smoker and having a low retention capacity, d) a hollow chamber disposed between the two filter elements and having a length of 2 to 6 mm at an overall length of the filter between 20 and 30 mm, e) a wrapper surrounding the two filter elements and the hollow chamber, f) an air-impermeable tipping paper for attaching the two filter elements to the tobacco rod, and g) a filter ventilation zone in the wrapper and the tipping paper in the middle of the hollow chamber, said filter ventilation zone extending in the circumferential direction and being produced on the finished filter cigarette by mechanical means or by laser irradiation, characterized by the combination of the following features : h) the first filter element (16) facing the tobacco rod has a retention capacity of 40 to 80% ; i) the second filter element (18) facing the mouth of the smoker has a retention capacity of 10% at the maximum ; j) the nicotine-to-condensate-yield ratio of the tobacco rod (12) is between 0.5 and 0.75 ; k) the packing density of the tobacco mixture of the tobacco rod (12) is between 200 and 230 mg/ml ; l) the draw resistance of the tobacco rod (12) is between 45 and 65 mm water column, measured under closed conditions ; m) the air permeability of the cigarette paper is 15 to 40 Coresta units ; and n) the filter ventilation degree is 50 to 80%.

Description

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

Ein solche Filtercigarette ist aus der Ausführungsform nach Fig. 3 der EP-OS 101 173 bekannt und weist insgesamt vier Hauptteile auf, nämlich einen von einem Cigarettenpapier umgebenen Tabakstrang, ein erstes, tabakstrangseitiges Filterelement, ein zweites, mundseitiges Filter­element und eine zwischen den beiden Filterelementen angeordnete Hohl­kammer. Die beiden Filterelemente und die Hohlkammer sind durch ein Umhüllungspapier umgeben; ein luftundurchlässiges Belagpapier umgibt die beiden Filterelemente und die Hohlkammer und dient zur Befestigung des Filters am Tabakstrang; im Bereich der Hohlkammer ist im Belagpa­pier und der Umhüllung eine Ventilationszone ausgebildet.Such a filter cigarette is known from the embodiment according to FIG. 3 of EP-OS 101 173 and has a total of four main parts, namely a tobacco rod surrounded by a cigarette paper, a first filter element on the tobacco rod side, a second filter element on the mouth side and one between the two filter elements arranged hollow chamber. The two filter elements and the hollow chamber are surrounded by wrapping paper; an air-impermeable covering paper surrounds the two filter elements and the hollow chamber and serves to fasten the filter to the tobacco rod; In the area of the hollow chamber, a ventilation zone is formed in the covering paper and the covering.

Über die Abmessungen und/oder die Eigenschaften der verschiedenen Ele­mente dieses Filters und des Tabakstrangs werden keine näheren Angaben gemacht; es wird nur darauf hingewiesen, daß das tabakstrangseitige Filterteil den überwiegenden Teil der Filterwirkung, nämlich im Bereich von 80 bis 90 % oder mehr, bewirkt, und deshalb aus einem Tow-Material mit kleinem Einzel-Denier und großem Gesamt-Denier besteht, während die Filterwirkung des mundseitigen Filterelementes relativ klein ist.No further details are given about the dimensions and / or the properties of the various elements of this filter and the tobacco rod; it is only pointed out that the tobacco rod-side filter part effects the major part of the filter effect, namely in the range of 80 to 90% or more, and therefore consists of a tow material with a small single denier and a large total denier, while the Filter effect of the mouth-side filter element is relatively small.

Die Ventilationsluft tritt dabei durch die Ventilationszone in die Hohlkammer ein und wird dort mit dem Rauchstrom gemischt, der durch das tabakstrangseitige Filterelement bereits stark gefiltert worden ist. Dieses Gemisch durchströmt dann das zweite, mundseitige Filterelement, das nur noch eine relativ geringe Filterwirkung hat, und gelangt von dort in den Mund des Rauchers.The ventilation air enters the hollow chamber through the ventilation zone and is mixed there with the smoke flow, which has already been heavily filtered by the filter element on the tobacco rod side. This mixture then flows through the second, mouth-side filter element, which has only a relatively low filter effect, and from there reaches the smoker's mouth.

Durch diesen Aufbau sollen sich verbesserte Geschmacks-Eigenschaften ergeben, die darauf zurückgeführt werden, daß der Großteil der den Ge­schmack beeinflussenden Komponenten des Rauches in den Mund des Rau­chers gelangen, während das Nikotin/Kondensat-Verhältnis relativ hoch ist.This structure is said to result in improved taste properties which can be attributed to the fact that the majority of the components of the smoke which influence the taste reach the mouth of the smoker, while the nicotine / condensate ratio is relatively high.

Eine solche Filtercigarette liefert einen bedeutend intensiveren Geschmackseindruck als nach DIN-Werten, also in Bezug auf Kondensat und Nikotin, gleiche Filtercigaretten mit ventiliertem Celluloseacetat-­Einfachfilter oder mit ventiliertem Doppelfilter ohne Mischkammer. Außerdem entsteht durch die Ver- bzw. Durchmischung von Rauch und Ventilationsluft in der Hohl- bzw. Mischkammer kein typisches Rauch-­Muster an der Mundseite des zweiten Filterelementes. Raucher-Tests haben nämlich ergeben, daß solche Muster unerwünscht sind; dabei handelt es sich bei konventionell ventilierten Filtern um einen "weißen Ring", der duch die den Rauch umhüllende Ventilationsluft gebildet wird, sowie um andere Muster bei getrennter Führung von Luft und Rauch zum mundseitigen Filteraustrittsende sowie um "sternförmige Muster" bei Ventilation durch wenige große Perforationslöcher. Auch andere Rauchmuster sind beobachtet und beanstandet worden.Such a filter cigarette provides a significantly more intense taste impression than according to DIN values, i.e. in terms of condensate and nicotine, same filter cigarettes with a ventilated cellulose acetate single filter or with a ventilated double filter without a mixing chamber. In addition, the mixing or mixing of smoke and ventilation air in the hollow or mixing chamber does not produce a typical smoke pattern on the mouth side of the second filter element. Smoking tests have shown that such patterns are undesirable; conventionally ventilated filters are a "white ring", which is formed by the ventilation air enveloping the smoke is, as well as other patterns with separate guidance of air and smoke to the mouth end of the filter outlet as well as "star-shaped patterns" with ventilation through a few large perforation holes. Other smoke patterns have also been observed and criticized.

Mit dieser bekannten Filtercigarette kann ein Nikotin/Kondensat-­Verhältnis von 1,5 erhalten werden, und zwar berechnet aus der Formel Nikotin-Gehalt/ Kondensat x10. Für viele Anwendungsfälle wird jedoch angestrebt, kleinere Nikotin/Kondensat-Verhältnisse von maximal 1,0 zu erzielen. Außerdem haben Raucher -Tests ergeben, daß bei vielen Varianten eines solchen aus drei Filterelementen bestehenden Filters der Geschmackseindruck noch zu wünschen übrig läßt.With this known filter cigarette a nicotine / condensate ratio of 1.5 can be obtained, calculated from the formula nicotine content / condensate x10. For many applications, however, the aim is to achieve smaller nicotine / condensate ratios of a maximum of 1.0. In addition, smoking tests have shown that in many variants of such a filter consisting of three filter elements, the taste impression still leaves something to be desired.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Filtercigarette der angegebenen Gattung zu schaffen, bei der die oben erwähnten Nachteile nicht auftreten.The invention is therefore based on the object of providing a filter cigarette of the type specified, in which the disadvantages mentioned above do not occur.

Insbesondere soll eine Filtercigarette vorgeschlagen werden, die unter Beibehaltung der Vorteile der bekannten Filtercigarette einen besseren Geschmackseindruck gewährleistet, ohne das Nikotin/Kondensat-Verhäl­tnis über 1,0 zu erhöhen.In particular, a filter cigarette is to be proposed which, while maintaining the advantages of the known filter cigarette, ensures a better taste impression without increasing the nicotine / condensate ratio above 1.0.

Dies wird erfindungsgemäß durch die im kennzeichnenden Teil des An­spruchs 1 angegebenen Merkmale erreicht.This is achieved according to the invention by the features specified in the characterizing part of 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 auf der Auslegung einer speziellen Filtercigarettenkonstruktion unter Anpassung der wesentlichen Parameter, nämlich der Spezifikationen des Tabakstrangs und der Abmessung und der Eigenschaften der beiden Filterelemente und der Mischkammer, in Richtung einer Gesamtkonstruktion, die einerseits den Geschmackseindruck und andererseits die Kondensat-Ausbeute opti­miert. Dabei soll die Nikotin-Ausbeute der Filtercigarette bis zu maximal 0,8 mg und die Kondensat-Ausbeute von 1 bis 8 mg betragen, und zwar unter Beibehaltung eines Nikotin/Kondensat-Verhältnisses von maximal 1,0.The advantages achieved with the invention are based on the design a special filter cigarette construction with adaptation of the essential parameters, namely the specifications of the tobacco rod and the dimensions and properties of the two filter elements and the mixing chamber, in the direction of an overall construction that optimizes the taste impression on the one hand and the condensate yield on the other. The nicotine yield of the filter cigarette should be up to a maximum of 0.8 mg and the condensate yield of 1 to 8 mg, while maintaining a nicotine / condensate ratio of at most 1.0.

Wie Rauchertests ergeben haben, liefert ein solches Filter in Kombi­nation mit dem Tabakstrang einen wesentlich intensiveren Geschmacks­eindruck als das Filter nach der EP-OS 101 173, verbunden mit den Vorteilen der bekannten Dreifach-Konstruktion, insbesondere dem Ver­meiden der erwähnten Rauchmuster.As smoker tests have shown, such a filter in combination with the tobacco rod gives a much more intense taste impression than the filter according to EP-OS 101 173, combined with the advantages of the known triple construction, in particular the avoidance of the smoke patterns mentioned.

Die angestrebte, niedrige Stopfdichte der Tabakmischung des Tabak­strangs sollte im Bereich von 200 bis 230 mg/ml liegen.The desired, low packing density of the tobacco mixture of the tobacco rod should be in the range of 200 to 230 mg / ml.

Außerdem sollte der Zugwiderstand des Tabakstrangs möglichst gering sein, d. h., im Bereich von 45 bis 65 mm WS. geschlossen gemessen, liegen, um im Zusammenwirken mit dem Dreifach-Filter den angestrebten Geschmack zu erzielen.In addition, the pull resistance of the tobacco rod should be as low as possible, i. that is, in the range of 45 to 65 mm WS. measured closed, in order to achieve the desired taste in cooperation with the triple filter.

Das den Tabakstrang umhüllende Cigarettenpapier sollte eine niedrige bis mittlere Luftdurchlässigkeit im Bereich von 15 bis 40 Coresta-Ein­heiten (CU = Coresta Units = cm³ / min cm² 100 mm WS) haben.The cigarette paper enveloping the tobacco rod should have a low to medium air permeability in the range of 15 to 40 Coresta units (CU = Coresta Units = cm³ / min cm² 100 mm WS).

Die Gesamtlänge des Filters sollte zwischen 20 und 30 mm liegen, wobei ähnlich wie bei üblichen Filtern, auch aus Gründen der Vereinfachung der Herstellung wegen der Benutzung der vorhandenen Maschinen, eine Gesamtlänge von 21mm bei einem Durchmesser von 7,95 mm bevorzugt wird.The total length of the filter should be between 20 and 30 mm, where Similar to conventional filters, also for reasons of simplification of manufacture due to the use of the existing machines, a total length of 21 mm with a diameter of 7.95 mm is preferred.

Der Ventilationsgrad dieses Filters sollte zwischen 50 und 80 % liegen; er läßt sich durch die entsprechende Ausgestaltung der Ventilationszone im Belagpapier und der Umhüllung über der Hohlkammer einstellen; nach einer bevorzugten Ausführungsform wird die Ventilationszone durch eine Loch-Reihe gebildet, die mindestens 10 mm vom mundseitigen Ende des Filters entfernt ist; die Löcher können entweder durch Laser-Bestrah­lung oder mechanisch an der fertigen Cigarette hergestellt werden und sollten möglichst groß sein. Es können 1 bis 30 Löcher verwendet wer­den, wobei gute Ergebnisse mit 15 bis 25 Löchern in der Ventilationsreihe erreicht werden.The degree of ventilation of this filter should be between 50 and 80%; it can be adjusted by the appropriate design of the ventilation zone in the covering paper and the covering over the hollow chamber; According to a preferred embodiment, the ventilation zone is formed by a row of holes which is at least 10 mm from the mouth end of the filter; the holes can either be produced by laser radiation or mechanically on the finished cigarette and should be as large as possible. 1 to 30 holes can be used, with good results being achieved with 15 to 25 holes in the ventilation line.

Überraschenderweise hat sich gezeigt, daß der intensivere Geschmacks­eindruck nur dann zu verzeichnen ist, wenn beide übereinander angeord­neten Filterpapiere, also das luftdurch- oder luftundurchlässige Um­hüllungspapier und das luftundurchlässige Belagpapier gemeinsam mecha­nisch oder mit Laserstrahlen an der fertigen Cigarette perforiert werden, wobei die Laserperforation bevorzugt wird.Surprisingly, it has been shown that the more intense taste impression can only be recorded if the two stacked filter papers, i.e. the air-impermeable or air-impermeable wrapping paper and the air-impermeable covering paper, are perforated together mechanically or with laser beams on the finished cigarette, with laser perforation being preferred.

Die beiden Filterelemente sollten mindestens 7 mm lang und die Hohl­kammer 2 bis 6 mm lang sein. Die entsprechende Aufteilung erfolgt unter Berücksichtigung der Gesamtlänge dieses Filters.The two filter elements should be at least 7 mm long and the hollow chamber 2 to 6 mm long. The corresponding division takes into account the total length of this filter.

Das erste, takakstrangseitige Filterelement sollte eine Retentions­leistung von 60 bis 80 % haben und aus einem Celluloseacetat-Filter­material mit Y-Querschnitt und möglichst niedrigem Einzel-Denier im Bereich von 1,5 bis 2,5 dpf (Denier per filament) bestehen, um die an­gestrebte, möglichst hohe Retention zu erzielen; das Gesamt-Denier dieses ersten Filterelementes sollte hoch, nämlich größer als 60.000 seinThe first filter element on the takak strand should have a retention capacity of 60 to 80% and should consist of a cellulose acetate filter material with a Y cross-section and the lowest possible individual denier in the range from 1.5 to 2.5 dpf (denier per filament) in order to desired to achieve the highest possible retention; the total denier of this first filter element should be high, namely greater than 60,000 be

In der Praxis läßt sich die angestrebte, extrem hohe Retentionsleistung z. B.durch Verwendung von zwei Tows mit Y-Querschnitt, einem Einzel-­Denier von 2,1 dpf und einem Gesamt-Denier von 36000 realisieren, so daß sich ein effektives Gesamt-Denier von 72.000 ergibt.In practice, the desired, extremely high retention performance z. B. by using two tows with Y cross-section, a single denier of 2.1 dpf and a total denier of 36000, so that there is an effective total denier of 72,000.

Das zweite, mundseitige Filterelement enthält ebenfalls Cellulose­acetat-Filtermaterial, aber aus möglichst groben Fasern, d. h., mit einem relativ hohen Einzel-Denier in der Größenordnung von 8 bis 12 dpf. Die Querschnittsform spielt nur eine nebengeordnete Rolle, d. h., es können Fasern mit rundem, aber auch mit Y-Querschnitt verwendet werden. Es wird ein relativ niedriges Gesamtdenier von 20.000 bis 40.000 angestrebt.The second, mouth-side filter element also contains cellulose acetate filter material, but from fibers that are as coarse as possible, i. that is, with a relatively high single denier on the order of 8 to 12 dpf. The cross-sectional shape only plays a secondary role, i. that is, fibers with a round but also with a Y cross section can be used. A relatively low total denier of 20,000 to 40,000 is aimed for.

Dadurch erhält das zweite Filterelement eine Retentionsleistung zwi­schen 0 und 10 %, wobei der Grenzwert "null" ausdrücklich ausgeschlos­sen wird, d. h., das zweite Filterelement sollte in jedem Falle eine wenn auch geringe Filterwirkung haben.As a result, the second filter element receives a retention performance between 0 and 10%, the limit value "zero" being expressly excluded, i. that is, the second filter element should in any case have a filtering effect, albeit a little.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die beiliegende, schematische Zeichnung näher erläutert, deren einzige Figur eine perspektivische Darstellung einer Filter­cigarette mit teilweise abgehobener Abdeckung zeigt.The invention is explained in more detail below on the basis of exemplary embodiments with reference to the accompanying schematic drawing, the sole figure of which shows a perspective illustration of a filter cigarette with the cover partially lifted off.

Die allgemein durch das Bezugszeichen 10 angedeutete Filtercigarette weist einen durch ein Cigarettenpapier 11 umgebenen Tabakstrang 12 und ein mit dem Tabakstrang 12 verbundenes Filter 14 auf.The filter cigarette, indicated generally by reference number 10, has a tobacco rod 12 surrounded by cigarette paper 11 and a filter 14 connected to the tobacco rod 12.

Die Stopfdichte der Tabakmischung des Tabakstrangs 12 ist niedrig und liegt zwischen 200 und 230 mg/ml. Der Zugwiderstand des Strangs ist ebenfalls möglichst gering und liegt zwischen 45 und 65 mm WS, ge­ schlossen gemessen.The packing density of the tobacco mixture of the tobacco rod 12 is low and is between 200 and 230 mg / ml. The tensile resistance of the strand is also as low as possible and is between 45 and 65 mm WS, ge closed measured.

Das Cigarettenpapier 11 hat eine niedrige bis mittlere Luftdurchläs­sigkeit im Bereich von 15 bis 40 Coresta-Einheiten

Figure imgb0001
The cigarette paper 11 has a low to medium air permeability in the range of 15 to 40 Coresta units
Figure imgb0001

Das Strangausbeute-Verhältnis Nikotin/Kondensat der Tabakmischung soll­te zwischen 0,5 und 0.75 liegen.The strand yield ratio nicotine / condensate of the tobacco mixture should be between 0.5 and 0.75.

Das Filter 14 besteht aus drei getrennten Teilen, nämlich einem ersten, tabakstrangseitigen Filterelement 16, einem zweiten, mundseitigen Filterelement 18 und einer zwischen den beiden Filterelementen 16 und 18 ausgebildeten Hohlkammer 20. Die beiden Filterelemente 16, 18 und die Hohlkammer 20 sind durch ein Umhüllungspapier 22 umgeben, das bei der dargestellten Ausführungsform luftundurchlässig ist.The filter 14 consists of three separate parts, namely a first filter element 16 on the tobacco rod side, a second filter element 18 on the mouth side and a hollow chamber 20 formed between the two filter elements 16 and 18. The two filter elements 16, 18 and the hollow chamber 20 are made of a wrapping paper 22 surrounded, which is air-impermeable in the illustrated embodiment.

Die Länge des Umhüllungspapiers 22 entspricht der Gesamtlänge des Fil­ters, also den Längsabmessungen der beiden Filterelemente 16 und 18 und der Hohlkammer 20.The length of the wrapping paper 22 corresponds to the total length of the filter, that is to say the longitudinal dimensions of the two filter elements 16 and 18 and the hollow chamber 20.

Ein luftundurchlässiges Belagpapier 24 umgibt das Umhüllungspapier 22 und dient zur Befestigung des eigentlichen "Filter-Tips" aus den bei­den Filterelementen 16, 18 und der Hohlkammer 20 und dem Umhüllungs­papier 22 an dem Tabakstrang 12, d. h., das Belagpapier 24 erstreckt sich noch etwas über den Tabakstrang 12, wie man aus der Figur erkennt.An air-impermeable covering paper 24 surrounds the wrapping paper 22 and serves to fasten the actual "filter tips" made of the two filter elements 16, 18 and the hollow chamber 20 and the wrapping paper 22 to the tobacco rod 12, i. that is, the covering paper 24 extends somewhat over the tobacco rod 12, as can be seen from the figure.

In der Mitte der Hohlkammer 20, in Längsrichtung des Filters 14 gesehen, sind sowohl im Umhüllungspapier 22 als auch im Belagpapier 24 Ventilationsöffnungen 26 ausgebildet, die in der Figur durch Punkte angedeutet sind.In the middle of the hollow chamber 20, as seen in the longitudinal direction of the filter 14, ventilation openings 26 are formed in the wrapping paper 22 as well as in the covering paper 24, which are shown by dots in the figure are indicated.

Diese Ventilationsöffnungen können mechanisch oder durch Laser-Perfo­ration hergestellt werden.These ventilation openings can be made mechanically or by laser perforation.

Als Alternative zu der dargestellten Ausführungsform kann das Umhül­lungspapier 22 auch luftdurchlässig sein, aber in jedem Fall ist es notwendig, daß die an der fertigen Cigarette erzeugten Ventilationsper­forationen durch beide Papiere hindurchgehen.As an alternative to the illustrated embodiment, the wrapping paper 22 can also be permeable to air, but in any case it is necessary that the ventilation perforations created on the finished cigarette pass through both papers.

Die Ventilationsöffnungen 26 sind in einer Querschnittsebene der Hohlkammer 20 angeordnet, d. h., liegen bei einer Abwicklung der beiden Papiere 22, 24 auf einer Linie.The ventilation openings 26 are arranged in a cross-sectional plane of the hollow chamber 20, i. that is, when the two papers 22, 24 are processed, they lie on one line.

Beim Rauchen einer Cigarette strömt der durch den Pfeil angedeutete Rauchstrom vom Tabakstrang 12 in das erste Filterelemente 16, das eine sehr hohe Retentionsleistung von 60 bis 80 % und eine Länge von min­destens 7 mm hat.When smoking a cigarette, the smoke flow indicated by the arrow flows from the tobacco rod 12 into the first filter element 16, which has a very high retention rate of 60 to 80% and a length of at least 7 mm.

Diese hohe Retentionsleistung kann durch Verwendung eines Cellulose­acetat-Filtermaterials mit möglichst niedrigem Einzel-Denier im Bereich von 1,5 bis 2,5 dpf (Denier per filament) mit Y-Querschnitt erreicht werden; das Gesamt-Denier des ersten Filterelementes 16 ist hoch und in jedem Fall größer als 60.000.This high retention rate can be achieved by using a cellulose acetate filter material with the lowest possible individual denier in the range from 1.5 to 2.5 dpf (denier per filament) with a Y cross-section; the total denier of the first filter element 16 is high and in any case greater than 60,000.

Von dem ersten Filterelement 16 strömt der nicht retinierte Teil des Rauchstromes in die Hohlkammer 20, in die über die Ventilations­öffnungen 26 Ventilationsluft gesaugt und dort mit dem Rauchstrom gemischt wird. Die Hohlkammer sollte eine Länge von 2 bis 6 mm haben und einen Ventilationsgrad von 50 bis 80 % gewährleisten, der durch eins bis dreißig Löcher, insbesondere fünfzehn bis fünfundzwanzig Löcher 26 erreicht wird, wobei die einzelnen Löcher 26 möglichst groß sein sollten.The non-retained part of the smoke flow flows from the first filter element 16 into the hollow chamber 20, into which ventilation air is sucked in via the ventilation openings 26 and mixed there with the smoke flow. The hollow chamber should have a length of 2 to 6 mm and ensure a degree of ventilation of 50 to 80%, through one to thirty holes, in particular fifteen to twenty-five Holes 26 is reached, the individual holes 26 should be as large as possible.

Das Gemisch Rauchstrom/Ventilationsluft strömt von der Hohlkammer 20 in das zweite Filterelement 18, das ebenfalls Celluloseacetat-Filtermate­rial, jedoch mit möglichst groben Fasern, nämlich einem hohen Einzel-­Denier in der Größenordnung von 8 bis 12 dpf enthält. Das Gesamt-Denier des zweiten Filterelementes 18 ist relativ gering und liegt im Bereich von 20.000 bis 40.000. Dadurch läßt sich eine Retentionsleistung von 0 bis 10 % einstellen.The mixture of smoke flow / ventilation air flows from the hollow chamber 20 into the second filter element 18, which likewise contains cellulose acetate filter material, but with fibers that are as coarse as possible, namely with a high individual denier in the order of 8 to 12 dpf. The total denier of the second filter element 18 is relatively low and is in the range from 20,000 to 40,000. This allows a retention rate of 0 to 10% to be set.

Das zweite Filterelement 18 sollte mindestens 7 mm lang sein, wobei die Aufteilung der verschiedenen Teillängen auf das erste Filterelement 16, die Hohlkammer 20 und das zweite Filterelement 18 unter Berücksichti­gung einer Gesamtlänge des Filters 14 von 20 bis 30 mm erfolgt.The second filter element 18 should be at least 7 mm long, the division of the different partial lengths into the first filter element 16, the hollow chamber 20 and the second filter element 18 taking into account a total length of the filter 14 of 20 to 30 mm.

Versuche mit einem solchen Filter 14 mit den angegebenen Abmessungen und Eigenschaften haben in Kombination mit dem spezifizierten Tabak­strang zu einer Kondensat-Ausbeute von 1 bis 8 mg und einer Nikotin-­Ausbeute von maximal 0,8 mg geführt, wobei das Nikotin/ Kondensat-­Verhältnis maximal 1,0 betrug.Experiments with such a filter 14 with the specified dimensions and properties in combination with the specified tobacco rod have resulted in a condensate yield of 1 to 8 mg and a nicotine yield of at most 0.8 mg, the nicotine / condensate ratio being at a maximum Was 1.0.

Im Verhältnis zu dem Filter nach der EP-OS 101 173 ergab sich ein wesentlich intensiverer Geschmackseindruck, wie durch Raucher-Tests belegt wurde.In relation to the filter according to EP-OS 101 173 there was a much more intense taste impression, as evidenced by smoking tests.

Im folgenden werden zwei Ausführungsbeispiele einer Filtercigarette 10 mit folgenden, gemeinsamen Spezifikationen und die zugehörigen Stan­dard-Abrauchwerte nach DIN beschrieben:Two exemplary embodiments of a filter cigarette 10 with the following common specifications and the associated standard smoke values according to DIN are described below:

Die Stopfdichte der Tabakmischung des Tabakstrangs 12 betrug 225 mg/ml, sein Strang-Zugwiderstand 55mm WS und das Strangausbeute-Verhältnis Nikotin/Kondensat 0,55. Die Luftdurchlässigkeit des Cigarettenpapiers 11 war 25 Coresta-Einheiten.The stuffing density of the tobacco mixture of the tobacco rod 12 was 225 mg / ml, its strand tensile resistance 55 mm WS and the strand yield ratio nicotine / condensate 0.55. The air permeability of the cigarette paper 11 was 25 Coresta units.

Die Gesamtlänge des Filters 14 betrug 21 mm und sein Durchmesser 7,95 mm, so daß dieser Filter 14 auf den üblichen Filterherstellungs- und Ansetz-Maschinen verarbeitet werden konnte.The total length of the filter 14 was 21 mm and its diameter 7.95 mm, so that this filter 14 could be processed on the usual filter manufacturing and attachment machines.

Das tabakstrangseitige, erste Filterelement 16 hatte eine Länge von 7 mm und bestand aus Celluloseacetat, hergestellt aus zwei Filter-Tows mit Y-Querschnitt und einem Einzel-Denier von 2,1 dpf; jedes Tow hatte ein Gesamt-Denier von 36.000, so daß das effektive Gesamt-Denier des Filterelementes 16 mit 72.000 angesetzt werden kann.The first filter element 16 on the tobacco rod side had a length of 7 mm and consisted of cellulose acetate, produced from two filter tows with a Y cross section and a single denier of 2.1 dpf; each tow had a total denier of 36,000, so that the effective total denier of the filter element 16 can be set at 72,000.

Der Zugwiderstand des Filterelementes 16 betrug bei geschlossener Mes­sung 115 mm Wassersäule; der effektive Retentionsgrad für das Konden­sat einschließlich Wasser war 65 %.The tensile resistance of the filter element 16 was 115 mm water column when the measurement was closed; the effective retention rate for the condensate including water was 65%.

Die Hohlkammer 20 hatte eine Länge von 5 mm.The hollow chamber 20 had a length of 5 mm.

Das zweite Filterelement 18 hatte eine Länge von 9 mm und bestand eben­falls aus Celluloseacetat mit einem Einzel-Denier von 8 dpf und einem Gesamt-Denier von 28.000. Auch hier wurden Fasern mit Y-Querschnitt verwendet.The second filter element 18 had a length of 9 mm and also consisted of cellulose acetate with a single denier of 8 dpf and a total denier of 28,000. Y-section fibers were also used here.

Der effektive Retentionsgrad des zweiten Filterelementes 18 betrug 3 %, und sein Zugwiderstand 9 mm WS, geschlossen gemessen.The effective degree of retention of the second filter element 18 was 3% and its tensile resistance was 9 mm WS, measured closed.

Das Umhüllungspapier 22 hatte eine Länge von 21 mm, erstreckte sich also über die gesamte Länge des Filters 14. Es besteht aus einem luft- und rauchundurchlässigen Material, nämlich einem beschichteten Papier oder einer Kunstfolie.The wrapping paper 22 had a length of 21 mm, ie extended over the entire length of the filter 14. It consists of an air and smoke-impermeable material, namely a coated paper or an art film.

Das Belagpapier 24 hatte eine Breite von 29 mm, gemessen vom mund­seitigen Ende des Filters 14 bis zur Begrenzungslinie des Belagpapiers 24 auf dem Tabakstrang 12. Es bestand ebenfalls aus einem luft- und rauchundurchlässigen Material.The topping paper 24 had a width of 29 mm, measured from the mouth end of the filter 14 to the boundary line of the topping paper 24 on the tobacco rod 12. It was also made of an air and smoke-impermeable material.

Die beiden Papiere 22, 24 wurden durch Laserperforation online an der fertigen Cigarette bei der Cigarettenherstellung mit einer Reihe von Ventilationsöffnungen 26 versehen, die in Umfangsrichtung des Filter­elementes 14 verlaufen und sich in der Mitte der Hohlkammer 20 be­finden.The two papers 22, 24 were provided by laser perforation online on the finished cigarette in the manufacture of cigarettes with a series of ventilation openings 26 which run in the circumferential direction of the filter element 14 and are located in the middle of the hollow chamber 20.

Bei einer ersten Version eines solchen Filters 14 wurde durch ent­sprechende Auslegung der Zahl und der Größe der Ventilationsöffnungen 26 im Belagpapier 24, und Umhüllungspapier 22 ein Ventilationsgrad von 64 % eingestellt. Es ergaben sich folgende Standard-Abrauchwerte der Filtercigarette nach DIN:
Kondensat: 4mg; Nikotin: 0,3 mg,
d. h., das Nikotin/Kondensat-Verhältnis betrug 0,75.In a first version of such a filter 14, a degree of ventilation of 64% was set by appropriately designing the number and size of the ventilation openings 26 in the covering paper 24 and wrapping paper 22. The following standard smoke cigarette smoke values resulted according to DIN:
Condensate: 4mg; Nicotine: 0.3 mg,
that is, the nicotine / condensate ratio was 0.75.

Bei einer zweiten Version wurde durch entsprechende Auslegung der Zahl und der Größe der Ventilationsöffnungen 26 in dem Umhüllungspapier 22 und dem Belagpapier 24 ein Ventilationsgrad von 72 % eingestellt.In a second version, a degree of ventilation of 72% was set by appropriately designing the number and size of the ventilation openings 26 in the wrapping paper 22 and the covering paper 24.

Die Standard-Abrauchwerte der Filtercigarette nach DIN betrugen nun:
Kondensat: 2mg; Nikotin: 0,2 mg,
d. h., das Nikotin/Kondensat-Verhältnis betrug 1,0.The standard smoke filter smoke values according to DIN were now:
Condensate: 2mg; Nicotine: 0.2 mg,
that is, the nicotine / condensate ratio was 1.0.

In Geschmackstests wurden diese Filtercigaretten positiv beurteilt. Die oben erläuterten Rauchmuster traten nicht auf.These filter cigarettes were assessed positively in taste tests. The smoke patterns explained above did not occur.

Claims (6)

1. Filtercigarette mit einem Verhältnis Nicotin/Kondensat von maximal 1,0
a) mit einem durch ein Cigarettenpapier umgebenen Tabakstrang,
b) mit einem ersten, tabakstrangseitigen Filterelement aus einem Faser­material mit geringem Einzeldenier und hohem Gesamtdenier und mit ent­sprechend hoher Retentionsleistung,
c) mit einem zweiten, mundseitigen Filterelement mit niedriger Retentions­leistung,
d) mit einer zwischen den beiden Filterelementen angeordneten Hohlkammer, die bei einer Gesamtlänge des Filters von 20 mm bis 30 mm eine Länge von 2 mm bis 6 mm hat,
e) mit einer die beiden Filterelemente und die Hohlkammer umgebenden Umhüllung,
f) mit einem luftundurchlässigen Belagpapier für die Befestigung der beiden Filterelemente am Tabakstrang, und
g) mit einer in Umfangsrichtung verlaufenden, an der fertigen Filterciga­rette mechanisch oder durch Laserstrahlen hergestellten Filterventila­tionszone in der Umhüllung und dem Belagpapier, die sich in der Mitte der Hohlkammer befindet,
gekennzeichnet durch die Kombination folgender Merkmale:
h) das erste, tabakstrangseitige Filterelement (16) hat eine Retentionslei­stung von 60 bis 80 %;
i) das zweite, mundseitige Filterelement (18) hat eine Retentionsleistung von maximal 10 %;
j) das Strangausbeute-Verhältnis Nicotin/Kondensat des Tabakstrangs (12) liegt zwischen 0,5 und 0,75;
k) die Stopfdichte der Tabakmischung des Tabakstrangs (12) liegt zwischen 200 und 230 mg/ml;
l) der Zugwiderstand des Tabakstrangs (12) liegt zwischen 45 und 65 mm WS, geschlossen gemessen;
m) die Luftdurchlässigkeit des Cigarettenpapiers beträgt 15 bis 40 Coresta-­Einheiten; und
n) der Filterventilationsgrad beträgt 50 bis 80 %.1. Filter cigarette with a nicotine / condensate ratio of maximum 1.0
a) with a tobacco rod surrounded by a cigarette paper,
b) with a first filter element on the tobacco rod side made of a fiber material with low individual denier and high total denier and with a correspondingly high retention rate,
c) with a second filter element on the mouth side with low retention capacity,
d) with a hollow chamber arranged between the two filter elements, which has a length of 2 mm to 6 mm with a total length of the filter of 20 mm to 30 mm,
e) with a covering surrounding the two filter elements and the hollow chamber,
f) with an airtight covering paper for fastening the two filter elements to the tobacco rod, and
g) with a filter ventilation zone running in the circumferential direction, which is produced mechanically or by laser beams on the finished filter cigarette, in the covering and the covering paper, which is located in the middle of the hollow chamber,
characterized by the combination of the following features:
h) the first, tobacco rod-side filter element (16) has a retention rate of 60 to 80%;
i) the second, mouth-side filter element (18) has a maximum retention rate of 10%;
j) the strand yield ratio nicotine / condensate of the tobacco rod (12) is between 0.5 and 0.75;
k) the density of the tobacco mixture of the tobacco rod (12) is between 200 and 230 mg / ml;
l) the tensile resistance of the tobacco rod (12) is between 45 and 65 mm WS, measured closed;
m) the air permeability of the cigarette paper is 15 to 40 Coresta units; and
n) the degree of filter ventilation is 50 to 80%. 2. Filtercigarette nach Anspruch 1, dadurch gekennzeichnet, daß die Venti­lationszone durch eine Reihe von Ventilationsöffnungen (26) gebildet ist, die mindestens 10 mm vom mundseitigen Ende des Filters (14) entfernt ist.2. Filter cigarette according to claim 1, characterized in that the ventilation zone is formed by a series of ventilation openings (26) which is at least 10 mm from the mouth end of the filter (14). 3. Filtercigarette nach Anspruch 2, dadurch gekennzeichnet, daß die Reihe eine bis dreißig Ventilationsöffnungen (26), insbesondere fünfzehn bis fünfundzwanzig Ventilationsöffnungen (26), aufweist.3. Filter cigarette according to claim 2, characterized in that the row has one to thirty ventilation openings (26), in particular fifteen to twenty-five ventilation openings (26). 4. Filtercigarette nach einem der Ansprüche 1 bis 3, dadurch gekennzeich­net, daß das erste, tabakstrangseitige Filterelement (16) aus einem Cellu­loseacetat-Filtermaterial mit einem Einzeldenier von 1,5 bis 2,5 dpf mit Y-Querschnitt und einem Gesamtdenier von mehr als 60.000 besteht.4. Filter cigarette according to one of claims 1 to 3, characterized in that the first, tobacco rod-side filter element (16) made of a cellulose acetate filter material with a single denier of 1.5 to 2.5 dpf with Y cross section and a total denier of more than 60,000 exists. 5. Filtercigarette nach einem der Ansprüche 1 bis 4, dadurch gekenn­zeichnet, daß das erste Filterelement (16) aus zwei Tows mit 1,5 bis 2,5 dpf besteht.5. Filter cigarette according to one of claims 1 to 4, characterized in that the first filter element (16) consists of two Tows with 1.5 to 2.5 dpf. 6. Filtercigarette nach einem der Ansprüche 1 bis 5, dadurch gekennzeich­net, daß das zweite Filterelement (18) aus Celluloseacetat-Filtermaterial mit einem Einzeldenier von 8 bis 12 dpf und einem Gesamtdenier von 20.000 bis 40.000 besteht.6. Filter cigarette according to one of claims 1 to 5, characterized in that the second filter element (18) consists of cellulose acetate filter material with a single denier of 8 to 12 dpf and a total denier of 20,000 to 40,000.
EP87110936A 1986-07-29 1987-07-28 Filter cigarette Expired - Lifetime EP0255114B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863625593 DE3625593A1 (en) 1986-07-29 1986-07-29 FILTER CIGARETTE
DE3625593 1986-07-29

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EP0255114A1 true EP0255114A1 (en) 1988-02-03
EP0255114B1 EP0255114B1 (en) 1990-07-25

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ES (1) ES2017684B3 (en)

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DE3837930C1 (en) * 1988-11-09 1989-09-28 H.F. & Ph.F. Reemtsma Gmbh & Co, 2000 Hamburg, De
EP0368065A1 (en) * 1988-11-09 1990-05-16 H.F. & Ph.F. Reemtsma GmbH & Co Aerated filter cigarette
GR890100471A (en) * 1989-07-21 1991-12-10 Bat Cigarettenfab Gmbh Cigarette filter
EP0413536A1 (en) * 1989-08-15 1991-02-20 British-American Tobacco Company Limited Improvements relating to smoking articles
US5150725A (en) * 1990-02-13 1992-09-29 Gallaher Ltd. Filter tipped smoking rods
WO1995007633A1 (en) * 1993-09-16 1995-03-23 H.F. & Ph.F. Reemtsma Gmbh & Co Ventilated filter cigarette
EP0885570A1 (en) * 1997-06-16 1998-12-23 Japan Tobacco Inc. Cigarette with a dual-structure filter
CN1103195C (en) * 1997-06-16 2003-03-19 日本烟草产业株式会社 Cigarette with dual-structure filter
KR20010015790A (en) * 1997-10-23 2001-02-26 에이취.에프.앤드 피에이취.에프.레엠트스마 게엠베하 Thin cigarette
WO1999026497A1 (en) * 1997-11-21 1999-06-03 H.F. & Ph.F. Reemtsma Gmbh Biodegradable cigarette filter
US6345625B1 (en) 1997-12-06 2002-02-12 Kar Eng Chew Filter for secondary smoke and smoking articles incorporating the same
EP0920817A2 (en) 1997-12-06 1999-06-09 Kar Eng Chew Filter
WO2004014162A1 (en) * 2002-08-08 2004-02-19 Susilo Wonowidjoyo Method for producing filter cigarettes
WO2004037025A2 (en) * 2002-10-23 2004-05-06 Filtrona International Limited Smokers filter
WO2004037025A3 (en) * 2002-10-23 2004-08-19 Filtrona Int Ltd Smokers filter
JP2006503572A (en) * 2002-10-23 2006-02-02 フィルトロナ インターナショナル リミティド Cigarette filter
US7980250B2 (en) 2002-10-23 2011-07-19 Filtrona International Limited Smokers filter
EP1670327A2 (en) † 2003-09-30 2006-06-21 R.J.Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US7669604B2 (en) 2003-09-30 2010-03-02 R.J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
EP1670327B2 (en) † 2003-09-30 2012-02-22 R.J.Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
CN106235405A (en) * 2016-08-31 2016-12-21 云南中烟工业有限责任公司 A kind of cigarette filter of scalable resistance to suction distribution

Also Published As

Publication number Publication date
DE3625593A1 (en) 1988-02-04
DE3763929D1 (en) 1990-08-30
DE3625593C2 (en) 1989-05-03
ES2017684B3 (en) 1991-03-01
EP0255114B1 (en) 1990-07-25

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