EP0649606A1 - Rauchartikel und Verfahren zu seiner Herstellung - Google Patents

Rauchartikel und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0649606A1
EP0649606A1 EP94307628A EP94307628A EP0649606A1 EP 0649606 A1 EP0649606 A1 EP 0649606A1 EP 94307628 A EP94307628 A EP 94307628A EP 94307628 A EP94307628 A EP 94307628A EP 0649606 A1 EP0649606 A1 EP 0649606A1
Authority
EP
European Patent Office
Prior art keywords
pressure drop
smoking article
high pressure
article according
mmwg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP94307628A
Other languages
English (en)
French (fr)
Inventor
Peter John Molloy
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.)
Rothmans International Services Ltd
Rothmans International Ltd
Original Assignee
Rothmans International Services Ltd
Rothmans International Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rothmans International Services Ltd, Rothmans International Ltd filed Critical Rothmans International Services Ltd
Publication of EP0649606A1 publication Critical patent/EP0649606A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

  • This invention relates to smoking articles such as cigarettes, cigars and cigarillos. They will be referred to, for brevity, as “cigarettes” hereafter.
  • cigarettes are designed to have a pressure drop usually in the order of 60-150 mmWG measured at the industry standard flow rate of 17.5 cm3s ⁇ 1. These figures are chosen so that there is some resistance to the draw on the cigarette but not so much that the smoker cannot vary and thereby control the volume taken in per puff. It is a consistent feature of filter and tobacco rod design that resistances must be controlled and kept low.
  • the tobacco rod may, as is conventional, include materials other than cut leaf, such as e.g. reconstituted tobacco, fillers and perfumes.
  • a construction which does not have a pressure drop of the order of 60-150 mmWG is an unsuccessful one. See for example US-A-3621851 where, in columns 20 and 22, comparative examples giving rise to pressure drops of 473, 566 and 567 mmWG are described as "totally unacceptable", but where in column 24 it is reasserted that a "very low pressure drop" is desirable.
  • Smokers of conventional cigarettes having pressure drops of the order of 60-150 mmWG have puff volumes which vary from user to user by a factor of 5. Low volumes are about 20 cm3 and large volumes about 100 cm3. Low volumes are achieved by the sharp application of a high pressure difference across the cigarette; the larger volumes tend to be achieved by the smoker taking a long draw at comparatively low pressure difference.
  • the present invention turns conventional wisdom on its head. It aims to reduce as far as is feasible the smoker's control over puff volume with the aim of reducing the volume of smoke generated per puff.
  • a smoking article which has a pressure drop across it which is in the range 250-700 mmWG at the flow rate of 17.5 cm3s ⁇ 1.
  • This extremely high pressure drop may be achieved by using a high pressure drop filter or a flow impediment in or attached to the tobacco rod, or both. In either case, the flow through the filter or impediment is essentially axial.
  • the reduction in smoke volume per puff can readily be compensated from the point of view of consumer satisfaction by selection blending or formulation of the tobacco rod and/or treatment of the filter, if present, to give more concentrated taste and flavour characteristics so as to provide an acceptable product.
  • Figure 1 is a partial diametrical section through a cigarette.
  • a wrapped tobacco rod 1 includes tobacco 2 which is highly flavoured and highly nicotinic, having e.g. a nicotine content of over 3%, and probably about 4% W/W on a dry basis.
  • a wrapped filter 3, overwrapped to join it to the tobacco rod, has two regions, a high pressure drop portion 4 and a conventional low pressure drop portion 5 at the mouth end of the cigarette.
  • the portion 4 is a discrete insert, being a tube 6 of essentially impervious material such as compressed paper, cellophane, closed-cell foam or even a plastics material sleeve or ring. It has a narrow central aperture 7 (not drawn to scale in the Figure). Selection of the diameter of the aperture (and to a minor extent, its length) varies the pressure drop across the region 4; in the present example the aperture has a diameter of 0.8 mm giving a pressure drop of 225 mm WG at the standard flow rate.
  • the pressure drop across conventional region 5 of e.g. cellulose acetate tow is of the order of 25 mm WG and across the tobacco rod about 50 mm WG.
  • the cigarette offers a pressure drop of 300 mm WG to the smoker drawing on it.
  • the volume of smoke taken per puff by the smoker will be of the order of 20 ⁇ 10 ml.
  • the very strong tobacco 2 yields a smoke which is perceived as acceptably mild by the smoker: the volume of tobacco burned per puff is reduced and the amount of tobacco in the tobacco rod can be very substantially reduced, e.g. by shortening the tobacco rod, without loss of either perceived yield or of smoking time.
  • the region 4 is occupied by a coiled sheet of smooth paper, cellophane or plastic such as polyethylene, polypropylene or nylon.
  • a coiled sheet of smooth paper, cellophane or plastic such as polyethylene, polypropylene or nylon.
  • These elements provide a high pressure drop of 175 mm WG or greater at the standard flow rate but offer relatively low filtration efficiencies at 10 to 30%.
  • the elements may either replace, or be included with, the flow impediment in region 4 in Figure 1.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
EP94307628A 1993-10-26 1994-10-18 Rauchartikel und Verfahren zu seiner Herstellung Withdrawn EP0649606A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9322085 1993-10-26
GB939322085A GB9322085D0 (en) 1993-10-26 1993-10-26 Smoking articles and method of making them

Publications (1)

Publication Number Publication Date
EP0649606A1 true EP0649606A1 (de) 1995-04-26

Family

ID=10744153

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94307628A Withdrawn EP0649606A1 (de) 1993-10-26 1994-10-18 Rauchartikel und Verfahren zu seiner Herstellung

Country Status (6)

Country Link
EP (1) EP0649606A1 (de)
JP (1) JPH07155160A (de)
AU (1) AU7577394A (de)
CA (1) CA2117811A1 (de)
GB (1) GB9322085D0 (de)
ZA (1) ZA948377B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8967155B2 (en) 2011-11-03 2015-03-03 Celanese Acetate Llc Products of high denier per filament and low total denier tow bands
US9247771B2 (en) 2011-11-08 2016-02-02 British American Tobacco (Investments) Limited Smoking article

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1431963A (fr) * 1965-01-11 1966-03-18 Rech S Tech Ets De Bouchon filtrant pour produits à base de tabac, notamment pour cigarettes
US3621851A (en) * 1969-11-26 1971-11-23 Kata Mfg & Filtering Co Filter for smoker's article
GB1436636A (en) * 1973-05-07 1976-05-19 Berkowitz S Tobacco smoking structures
US4059121A (en) * 1973-04-20 1977-11-22 Rothmans Of Pall Mall Canada Limited Filter for tobacco smoke
GB2086206A (en) * 1980-10-17 1982-05-12 British American Tobacco Co Smoking-material rods and a method of making such rods
GB2201879A (en) * 1987-03-02 1988-09-14 Hercules Inc Making cigarette filter rod
EP0539009A2 (de) * 1991-10-23 1993-04-28 Rothmans International Services Limited Zigarette mit Filtermundstück

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1431963A (fr) * 1965-01-11 1966-03-18 Rech S Tech Ets De Bouchon filtrant pour produits à base de tabac, notamment pour cigarettes
US3621851A (en) * 1969-11-26 1971-11-23 Kata Mfg & Filtering Co Filter for smoker's article
US4059121A (en) * 1973-04-20 1977-11-22 Rothmans Of Pall Mall Canada Limited Filter for tobacco smoke
GB1436636A (en) * 1973-05-07 1976-05-19 Berkowitz S Tobacco smoking structures
GB2086206A (en) * 1980-10-17 1982-05-12 British American Tobacco Co Smoking-material rods and a method of making such rods
GB2201879A (en) * 1987-03-02 1988-09-14 Hercules Inc Making cigarette filter rod
EP0539009A2 (de) * 1991-10-23 1993-04-28 Rothmans International Services Limited Zigarette mit Filtermundstück

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8967155B2 (en) 2011-11-03 2015-03-03 Celanese Acetate Llc Products of high denier per filament and low total denier tow bands
US9247771B2 (en) 2011-11-08 2016-02-02 British American Tobacco (Investments) Limited Smoking article

Also Published As

Publication number Publication date
GB9322085D0 (en) 1993-12-15
AU7577394A (en) 1995-05-18
JPH07155160A (ja) 1995-06-20
CA2117811A1 (en) 1995-04-27
ZA948377B (en) 1995-06-27

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19951027