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WO1996014762A1 - Tobacco rod and/or filter for smoking article - Google Patents

Tobacco rod and/or filter for smoking article Download PDF

Info

Publication number
WO1996014762A1
WO1996014762A1 PCT/GB1995/002646 GB9502646W WO9614762A1 WO 1996014762 A1 WO1996014762 A1 WO 1996014762A1 GB 9502646 W GB9502646 W GB 9502646W WO 9614762 A1 WO9614762 A1 WO 9614762A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
carbon fibre
smoking article
tobacco rod
fibre material
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.)
Ceased
Application number
PCT/GB1995/002646
Other languages
French (fr)
Inventor
Edward Dennis John
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
Priority to AU38516/95A priority Critical patent/AU3851695A/en
Publication of WO1996014762A1 publication Critical patent/WO1996014762A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES 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
    • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
    • A24D3/163—Carbon
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances

Definitions

  • This invention relates to tobacco rods for smoking articles such as cigarettes, cigarillos and cigars and also to a filter tip for such an article.
  • BACKGROUND OF THE INVENTION There have been numerous proposals for additives to tobacco rods and/or filters, as well as to the papers of both of those, in order to modify various aspects of the characteristics of the article when smoked, either from the physical or from the chemical point of view or both.
  • carbon in fibrous form being carbon fibre or carbonised fibre materials (e.g. carbonised polyester or polyamide) in either or both of the tobacco rod or the filter of a smoking article.
  • carbon fibre materials e.g. carbonised polyester or polyamide
  • these carbon fibre materials will be used as a continuous strand so as to be incorporatable into the tobacco rod and/or the filter construction, as the case may be, during the ordinary continuous manufacturing operations applied to these articles.
  • the carbon fibre materials may be incorporated as chopped fibre into the tobacco rod or filter.
  • carbon fibre materials particularly when in a bundle forming a strand, are an efficient retainer of flavourings and also efficient at giving up that flavouring to a stream of heated gas upon burning of the cigarette. Upon that burning carbon fibre material itself will normally be turned completely to gaseous oxidation products with little or no residue.
  • the strand of carbon fibre materials for example a loosely assembled bundle or strand of typically 1 to 30 micrometres diameter or larger be placed axially centrally in the tobacco rod or filter assembly during ordinary manufacture of these items.
  • the bundle will have previously been perfumed or flavoured by being drawn through a bath of perfume material such as a top- flavour solution.
  • Perfume will be retained both by surface adsorption on the fibre material and by interstitial retention between the fibres of the bundle.
  • Carbonised polyester typically 1 to 500 micrometres or larger
  • suitable carbonised fibre materials such as carbonised polyamides e.g. Nylon ®
  • perfume or flavour carriers e.g. a top flavour
  • the carbon fibre materials are metal plated to further modify the smoke chemistry and improve the appearance of the article.
  • this metal plating will be individual.
  • Metals which are suitable for plating include, in successive layers, first copper then silver; copper then gold; copper, silver then gold; copper, silver then platinum; copper, silver, gold then platinum or other suitable metals such as tin.
  • the preferred option in this case would be the incorporation of plated carbon fibre materials in a filter only.
  • Fig 1 shows a diametrical section through a tobacco rod
  • Fig 2 shows a diametrical section through a filter assembly
  • Fig 3 is a side view of a filter-tip cigarette.
  • a tobacco rod 1 includes conventional smoking material 3 wrapped by conventional cigarette paper 4.
  • a continuous strand or bundle 5 of carbon fibre material in this case carbon fibres each of 1 to 30 micrometres diameter, the bundle being made up of many fibres may vary in cross-sectional area.
  • the bundle of carbon fibres was assembled into the tobacco rod using a conventional tobacco rod making machine with the strand being drawn in with the prepared stream of smoking material for compression wrapping and cutting to length. Before that however the bundle had been passed through a bath of perfume material e.g. a top-flavour solution, whereupon it picked up an adequate amount of perfume material by surface adsorption and by interstitial capillary attraction. It has been found that a bundle of carbon fibre materials thus treated will retain, perfume adequately even in the open air for some weeks, and when enwrapped in the body of the cigarette or filter for at least as long as the expected shelf life of the cigarette.
  • perfume material e.g. a top-flavour solution
  • Fig 2 shows a filter 6 with conventional filter material 7 and a strand 8 of perfumed or flavoured carbonised fibre materials, e.g. carbonised polyester running axially through the filter, wrapped in conventional plugwrap 9.
  • a filter 6 with conventional filter material 7 and a strand 8 of perfumed or flavoured carbonised fibre materials, e.g. carbonised polyester running axially through the filter, wrapped in conventional plugwrap 9.
  • the carbon fibre materials may be electroplated with suitable metals.
  • the plated materials would be incorporated in the filter only and the strand 8 would be a bundle of carbonised fibre materials plated to a total thickness of typically 0.01-30 micrometers with successive, individual metallic layers, e.g. first with copper then silver; copper then gold; copper, silver then platinum; copper, silver, gold then platinum, or other suitable metals such as tin. If plated fibre is used there may be additional effects on the smoke chemistry over and above that provided by the carbon.
  • the tobacco rod shown in Fig 1 and the filter shown in Fig 2 may be assembled conventionally together by an overwrap to form a filtered smoking article such as cigarette 10, Fig 3, or may be combined respectively with any conventional filter or any conventional tobacco rod.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

Carbon fibre material (8) is used in a smoking article such as a filter (6) primarily as a flavour carrier. The carbon fibre material is preferably bundled and runs continuously the whole length of the article. The fibres may be metal-coated.

Description

TOBACCO ROD AND/OR FILTER FOR SMOKING ARTICLE
This invention relates to tobacco rods for smoking articles such as cigarettes, cigarillos and cigars and also to a filter tip for such an article. BACKGROUND OF THE INVENTION There have been numerous proposals for additives to tobacco rods and/or filters, as well as to the papers of both of those, in order to modify various aspects of the characteristics of the article when smoked, either from the physical or from the chemical point of view or both.
Amongst the additives which have been proposed, especially in the paper and in a filter tip, is carbon, but as far as we are aware always in an amorphous or granular form.
In paper the carbon has been present to reduce certain sidestream smoke components and to act as a flavour carrier, and in filters to act as an absorbent/adsorbent for certain. of the components of the mainstream smoke.
SUMMARY OF THE INVENTION The present invention however proposes the use of carbon in fibrous form, being carbon fibre or carbonised fibre materials (e.g. carbonised polyester or polyamide) in either or both of the tobacco rod or the filter of a smoking article. For brevity, the carbon in fibrous form will be referred to as "carbon fibre materials".
Preferably these carbon fibre materials will be used as a continuous strand so as to be incorporatable into the tobacco rod and/or the filter construction, as the case may be, during the ordinary continuous manufacturing operations applied to these articles.
However, it is possible that the carbon fibre materials may be incorporated as chopped fibre into the tobacco rod or filter.
The presence of the carbon fibre materials in themselves will affect the smoke chemistry but it is in particular envisaged that the fibre will be used as a carrier for flavourings.
It is quite surprisingly found that carbon fibre materials, particularly when in a bundle forming a strand, are an efficient retainer of flavourings and also efficient at giving up that flavouring to a stream of heated gas upon burning of the cigarette. Upon that burning carbon fibre material itself will normally be turned completely to gaseous oxidation products with little or no residue.
It is especially preferable that the strand of carbon fibre materials, for example a loosely assembled bundle or strand of typically 1 to 30 micrometres diameter or larger be placed axially centrally in the tobacco rod or filter assembly during ordinary manufacture of these items. The bundle will have previously been perfumed or flavoured by being drawn through a bath of perfume material such as a top- flavour solution.
Perfume will be retained both by surface adsorption on the fibre material and by interstitial retention between the fibres of the bundle.
Carbonised polyester (fibre diameter typically 1 to 500 micrometres or larger) or other suitable carbonised fibre materials such as carbonised polyamides e.g. Nylon® may also be used as perfume or flavour carriers (e.g. a top flavour) . When perfume or flavour is present, incorporation within the filter would be the preferred option.
Another use of the fibres is that in which the carbon fibre materials are metal plated to further modify the smoke chemistry and improve the appearance of the article. Preferably this metal plating will be individual. Metals which are suitable for plating include, in successive layers, first copper then silver; copper then gold; copper, silver then gold; copper, silver then platinum; copper, silver, gold then platinum or other suitable metals such as tin.
The preferred option in this case would be the incorporation of plated carbon fibre materials in a filter only.
BRIEF DESCRIPTION OF THE DRAWINGS Particular embodiments of the invention will be described with reference to the accompanying drawings wherein:
Fig 1 shows a diametrical section through a tobacco rod; and Fig 2 shows a diametrical section through a filter assembly; and
Fig 3 is a side view of a filter-tip cigarette.
DESCRIPTION OF PREFERRED EMBODIMENTS In Fig 1 a tobacco rod 1 includes conventional smoking material 3 wrapped by conventional cigarette paper 4. Along the axial centre of the tobacco rod runs a continuous strand or bundle 5 of carbon fibre material, in this case carbon fibres each of 1 to 30 micrometres diameter, the bundle being made up of many fibres may vary in cross-sectional area.
The bundle of carbon fibres was assembled into the tobacco rod using a conventional tobacco rod making machine with the strand being drawn in with the prepared stream of smoking material for compression wrapping and cutting to length. Before that however the bundle had been passed through a bath of perfume material e.g. a top-flavour solution, whereupon it picked up an adequate amount of perfume material by surface adsorption and by interstitial capillary attraction. It has been found that a bundle of carbon fibre materials thus treated will retain, perfume adequately even in the open air for some weeks, and when enwrapped in the body of the cigarette or filter for at least as long as the expected shelf life of the cigarette.
When the tobacco rod is smoked, carbon fibre material in the rod is oxidised to a gaseous product.
Fig 2 shows a filter 6 with conventional filter material 7 and a strand 8 of perfumed or flavoured carbonised fibre materials, e.g. carbonised polyester running axially through the filter, wrapped in conventional plugwrap 9.
Alternatively, the carbon fibre materials may be electroplated with suitable metals. In this case, the plated materials would be incorporated in the filter only and the strand 8 would be a bundle of carbonised fibre materials plated to a total thickness of typically 0.01-30 micrometers with successive, individual metallic layers, e.g. first with copper then silver; copper then gold; copper, silver then platinum; copper, silver, gold then platinum, or other suitable metals such as tin. If plated fibre is used there may be additional effects on the smoke chemistry over and above that provided by the carbon.
The tobacco rod shown in Fig 1 and the filter shown in Fig 2 may be assembled conventionally together by an overwrap to form a filtered smoking article such as cigarette 10, Fig 3, or may be combined respectively with any conventional filter or any conventional tobacco rod.

Claims

CLAIMS :
1. A smoking article comprising carbon fibre material.
2. A smoking article according to claim 1 wherein the carbon fibre material is bundled.
3. A smoking article according to claim 1 or claim 2 wherein the carbon fibre material carries a flavour.
4. A smoking article according to any one of the preceding claims wherein the carbon fibre material is in a tobacco rod thereof .
5. A smoking article according to any one of the preceding claims wherein the carbon fibre material is in a filter thereof.
6. A smoking article according to claim 5 wherein the carbon fibre material is metallized.
7. A smoking article according to claim 4 wherein the carbon fibre material extends continuously the whole length of the tobacco rod.
8. A smoking article according to claim 5 or claim 6 wherein the carbon fibre material extends continuously the whole length of the filter.
9. A smoking article according to any one of the preceding claims which is a filter cigarette containing said carbon fibre material in at least one of its tobacco rod and its filter.
PCT/GB1995/002646 1994-11-16 1995-11-10 Tobacco rod and/or filter for smoking article Ceased WO1996014762A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU38516/95A AU3851695A (en) 1994-11-16 1995-11-10 Tobacco rod and/or filter for smoking article

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9423119A GB9423119D0 (en) 1994-11-16 1994-11-16 Tobacco rod and/or filter for smoking article
GB9423119.8 1994-11-16

Publications (1)

Publication Number Publication Date
WO1996014762A1 true WO1996014762A1 (en) 1996-05-23

Family

ID=10764494

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/002646 Ceased WO1996014762A1 (en) 1994-11-16 1995-11-10 Tobacco rod and/or filter for smoking article

Country Status (4)

Country Link
AU (1) AU3851695A (en)
GB (1) GB9423119D0 (en)
WO (1) WO1996014762A1 (en)
ZA (1) ZA959717B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015028812A1 (en) * 2013-08-30 2015-03-05 British American Tobacco (Investments) Limited Smoking article
US9380809B2 (en) 2009-03-26 2016-07-05 British American Tobacco (Investments) Limited Rod for a smoking article and method and apparatus for manufacture

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2072422A5 (en) * 1970-10-23 1971-09-24 Lonza Ag Tobacco/carbon fibre product as filter mat - erial for cigarettes, cigars, etc
US3738374A (en) * 1970-03-05 1973-06-12 B Lab Cigar or cigarette having substitute filler
US3943941A (en) * 1972-04-20 1976-03-16 Gallaher Limited Synthetic smoking product
FR2377162A1 (en) * 1977-01-13 1978-08-11 Toho Beslon Co TOBACCO SMOKE FILTER, CONTAINING NITROGENIC ACTIVATED CARBON FIBERS
FR2393542A1 (en) * 1977-06-10 1979-01-05 Job Ets Bardou Job Pauilhac Composite triple filter for cigarettes or cigars - has finely divided active carbon or carbon fibres increasing efficiency
US4219031A (en) * 1979-03-05 1980-08-26 Philip Morris Incorporated Smoking product having core of fibrillar carbonized matter
GB2064293A (en) * 1979-09-19 1981-06-17 Gallaher Ltd Fibrous carbon cigar filter
US5191905A (en) * 1990-03-16 1993-03-09 Costarica Sogo Kaihatsu Co., Ltd. Filter cigarette having filter containing absorptive synthetic graft polymer fibers produced from irradiated polyethylene reacted with vapor phase styrene or absorptive synthetic magnetic fibers

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738374A (en) * 1970-03-05 1973-06-12 B Lab Cigar or cigarette having substitute filler
FR2072422A5 (en) * 1970-10-23 1971-09-24 Lonza Ag Tobacco/carbon fibre product as filter mat - erial for cigarettes, cigars, etc
US3943941A (en) * 1972-04-20 1976-03-16 Gallaher Limited Synthetic smoking product
FR2377162A1 (en) * 1977-01-13 1978-08-11 Toho Beslon Co TOBACCO SMOKE FILTER, CONTAINING NITROGENIC ACTIVATED CARBON FIBERS
FR2393542A1 (en) * 1977-06-10 1979-01-05 Job Ets Bardou Job Pauilhac Composite triple filter for cigarettes or cigars - has finely divided active carbon or carbon fibres increasing efficiency
US4219031A (en) * 1979-03-05 1980-08-26 Philip Morris Incorporated Smoking product having core of fibrillar carbonized matter
GB2064293A (en) * 1979-09-19 1981-06-17 Gallaher Ltd Fibrous carbon cigar filter
US5191905A (en) * 1990-03-16 1993-03-09 Costarica Sogo Kaihatsu Co., Ltd. Filter cigarette having filter containing absorptive synthetic graft polymer fibers produced from irradiated polyethylene reacted with vapor phase styrene or absorptive synthetic magnetic fibers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9380809B2 (en) 2009-03-26 2016-07-05 British American Tobacco (Investments) Limited Rod for a smoking article and method and apparatus for manufacture
US10285435B2 (en) 2009-03-26 2019-05-14 British American Tobacco (Investments) Limited Rod for a smoking article and method and apparatus for manufacture
WO2015028812A1 (en) * 2013-08-30 2015-03-05 British American Tobacco (Investments) Limited Smoking article

Also Published As

Publication number Publication date
GB9423119D0 (en) 1995-01-04
ZA959717B (en) 1996-08-23
AU3851695A (en) 1996-06-06

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