EP1411784A1 - Filtre de cigarette - Google Patents

Filtre de cigarette

Info

Publication number
EP1411784A1
EP1411784A1 EP02756831A EP02756831A EP1411784A1 EP 1411784 A1 EP1411784 A1 EP 1411784A1 EP 02756831 A EP02756831 A EP 02756831A EP 02756831 A EP02756831 A EP 02756831A EP 1411784 A1 EP1411784 A1 EP 1411784A1
Authority
EP
European Patent Office
Prior art keywords
section
filter
cigarette filter
general
selective
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
EP02756831A
Other languages
German (de)
English (en)
Other versions
EP1411784B1 (fr
EP1411784B8 (fr
Inventor
James N. Figlar
Brian E. Tucker
F. Kelley St. Charles
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.)
Brown and Williamson Holdings Inc
Original Assignee
Brown and Williamson Tobacco Corp
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 Brown and Williamson Tobacco Corp filed Critical Brown and Williamson Tobacco Corp
Publication of EP1411784A1 publication Critical patent/EP1411784A1/fr
Publication of EP1411784B1 publication Critical patent/EP1411784B1/fr
Application granted granted Critical
Publication of EP1411784B8 publication Critical patent/EP1411784B8/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • A24D3/12—Use of materials for tobacco smoke filters of ion exchange materials
    • 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

Definitions

  • the present invention relates to a cigarette filter that includes a smoke constituent adsorbent which, when combined with a carbon-based filtering material, demonstrates synergistic reductions in smoke vapor constituents.
  • Cigarettes include tobacco rods or columns which, when burned, produce a particulate and a vapor phase.
  • filters began to be attached to an end of the tobacco column.
  • the filter removed various smoke components.
  • the fibrous materials are not effective at removing volatile constituents, such as aldehydes, hydrogen cyanide and sulf ⁇ des, which are found in the vapor phase.
  • an adsorbent or absorbent is combined with the fibrous material to improve removal of the vapor phase components.
  • cigarette filters have included activated carbon, porous minerals such as meerschaum, silica gel, cation-exchange resins and anion-exchange resins.
  • Charcoal has a high specific surface area and is a relatively strong adsorbent for vapor-phase constituents of tobacco smoke. When coated with a mixture of metallic oxides, charcoal is particularly effective in removing acidic gases. Meerschaum has a large adsorption area with a strong adsorption affinity for charged species, but a considerably low adsorption affinity for non-polar species. Silica gels are generally regarded as weakly retentive adsorbents for vapor-phase constituents of tobacco smoke. Although silica gel readily adsorbs aldehydes and hydrogen cyanide, the constituents also readily desorb from the silica gel. Cation exchange resins have been proposed for nicotine removal.
  • Anion exchange resins have been proposed for the removal of smoke acids, but strongly basic anion exchangers have no effect on smoke vapor phase aldehydes.
  • Weakly basic anion-exchange resins of porous structure are suitable for the removal of smoke acids and aldehydes, but their efficiency diminishes during smoking, as does that of carbon and porous minerals.
  • Two or more adsorbents can be used in combination in cigarette filters.
  • U.S. Patent 2,815,760 describes the use of an ion exchange material with
  • the present invention relates to a cigarette filter that includes a multiple section filter which reduces the level of predetermined smoke constituents.
  • the filter consists of a fibrous filter plug located at the mouth-end of the cigarette, a section containing a selective adsorbent material, and a section containing a general adsorbent material.
  • the filter plug can be any filter plug known in the art, such as cellulose acetate tow.
  • the general adsorbent material is preferably selected from a group of relatively high surface area materials, such as activated charcoal, which are capable of adsorbing a range of chemical compounds without a high degree of specificity.
  • the selective adsorbent material is chosen based on the specific smoke constituents targeted for removal.
  • the selective adsorbent material is selected from a group of surface functionalized resins, wherein each resin consists of an essentially inert carrier with a surface area of greater than about 35 m 2 / g.
  • the selective adsorbent material has a phenol-formaldehyde resin matrix surface-functionalized with mainly primary and secondary amine functional groups.
  • the selective adsorbent material may be adjacent to a tobacco rod and the general adsorbent material positioned between the selective adsorbent section and the filter plug.
  • the general adsorbent material may be positioned adjacent to the tobacco rod and the selective adsorbent material between the general adsorbent section and the filter plug.
  • Preliminary data indicates that the former orientation produces a synergistic effect in smoke constituent reductions relative to the latter orientation.
  • selective adsorbent and general adsorbent may be interspersed in a traditional filter plug material, such as cellulose acetate, or the adsorbents may be packed as a bed or thin layer sections within filter plug material.
  • Figure 1 is a perspective view of a prior art filter-tipped cigarette
  • Figure 2 is a perspective view of a filter for a cigarette made in accordance with the present invention wherein the adsorbents are dispersed throughout a filter plug material, and the general adsorbent section is positioned between the filter plug and the selective adsorbent section;
  • Figure 3 is a perspective view of a filter for a cigarette made in accordance with the present invention wherein the adsorbents are dispersed throughout a filter plug material, and the selective adsorbent section is positioned between the filter plug and the general adsorbent section;
  • Figure 4 is a perspective view of a filter for a cigarette made in accordance with the present invention wherein the adsorbents are packed as beds within a segment of a filter plug material;
  • Figure 5 is a cross-sectional view of an embodiment of the present invention with the filter plug disposed between the general adsorbent section and the selective adsorbent section;
  • Figure 6 is a cross-sectional view of an embodiment of the present invention with the filter plug adjacent one end of a tobacco rod;
  • Figure 7 is a cross-sectional view of an embodiment of the present invention with the adsorbents being sectionalized in a single length of fibrous filter material; and, Figure 8 is a cross-sectional view of an embodiment of the present invention absent a filter plug section.
  • the cigarette filter of the present invention includes a multiple section filter which reduces the levels of predetermined smoke constituents.
  • the filter consists of a fibrous filter plug located at the mouth-end of the cigarette, a section containing a selective adsorbent material, and a section containing a general adsorbent material.
  • a typical filter-tipped cigarette 10 has a filter 30 attached to a tobacco rod 20.
  • the tobacco rod 20 consists of a loose tobacco-containing mixture 22 wrapped in a cigarette paper 24, and the filter 30 includes a filter plug 32 wrapped in a plug wrap 34.
  • a sheet of tipping paper 36 joins the filter 30 to the tobacco rod 20.
  • a cigarette 110 has a multiple
  • the filter 130 includes a filter plug
  • the filter plug 132 is adjacent a first or mouth end 131 of the filter
  • the bed of the selective adsorbent 136 is adjacent a second or tobacco-rod end
  • the bed of the general adsorbent 134 is positioned between the
  • the filter plug 132 is made from a filamentary or fibrous material and provides a clean, neat appearance at the mouth end 131 of the cigarette.
  • the filter plug 132 also retains a firmness at the mouth end 131 as the cigarette 110 is consumed.
  • the filter plug 132 can be made from a variety of materials, among the most common being cellulose, cellulose acetate tow, paper, cotton, polypropylene web, polypropylene tow, polyester web, polyester tow or combinations thereof.
  • a plasticizer may be included.
  • the general adsorbent section 134 includes a general adsorbent material 144
  • a filter plug material 142 such as in a "dual-dalmatian" filter
  • the general adsorbent material 144 is preferably selected from a
  • the general adsorbent for example, the general adsorbent
  • activated charcoal can be selected from activated charcoal, activated coconut carbon, activated coal-
  • Ambersorb 572 or Ambersorb 563 a carbonaceous resin derived from the pyrolysis of sulfonated styrene-divinylbenzene available from Rohm and
  • complexes may be included in the general adsorbent section.
  • the selective adsorbent section 136 includes a selective adsorbent material 146 dispersed throughout a filter plug material 142, such as in a "dual-dalmatian"
  • the selective adsorbent material 146 is preferably selected
  • the selective adsorbent material 146 may be an ion- exchange resin, such as Duolite A7 (available from Rohm and Haas, 5000 Richmond Street, Philadelphia, PA 19137), or a material having similar functional groups and binding affinities.
  • the Duolite A7 has a phenol-formaldehyde rsin matrix and is
  • adsorbent 146 are dependent on a number of variables, including how strongly the
  • the selective adsorbent 146 have a surface area of greater than about 35 m 2 / g so that there is minimal diffusional resistance and the surface area
  • adsorbent section 134 where other constituents may be retained by the adsorbent
  • the multiple section filter 110 is made having a filter plug 132 made of cellulose
  • acetate tow and being about 7 mm in length, and having a general adsorbent section
  • selective adsorbent section 136 consisting of 40 mg of Duolite A7 dispersed
  • pyridine hydrogen cyanide, hydrogen sulfide, styrene, 2-methylpropanal, benzene, propionaldehyde, furan, isoprene, 1,3-butadiene, crotonaldehyde, acetone, acrylonitrile, acetaldehyde, toluene, carbon disulfide, methyl ethyl ketone / butyraldehyde, propionaldehyde, acetonitrile, and methanol as compared to
  • the multiple section filter 130 has the filter plug 132
  • the general adsorbent section 134 is adjacent the tobacco-rod end
  • the smoke first passes through the general adsorbent section 134, then through
  • the multiple section filter 230 is essentially identical to the filter 130
  • FIG. 2 (Fig. 2) of the first example embodiment except that the general adsorbent section 134 is adjacent to the tobacco rod 20 and the selective adsorbent section 136 is
  • the absorbents 144, 146 are packed within the filter plug
  • the layer packed absorbents are exposed to less
  • plasticizer than the tow-dispersed absorbents and retain more surface area for
  • section filter 630 for a cigarette 610 includes the general adsorbent 344 and the
  • An advantage of the embodiment 110 of Figure 2 is that the smoke passes
  • the filter plug 132 is disposed between the
  • Fig. 5 the selective adsorbent section 136 is at the mouth end of the filter 430 and in Fig. 6 the general adsorbent
  • section 134 is at the mouth end of the filter 530. Moreover, as shown in Fig. 8, a
  • multiple section filter 730 of a cigarette 710 includes only a general absorbent
  • Example 1 A cigarette 110 with a multiple section filter 130 is prepared as shown in Figure 2 wherein a filter plug 132 is made of cellulose acetate tow and is
  • a general adsorbent section 134 consists of about 40 mg of
  • acetate tow 142 cut to deliver a section 134 about 10 mm in length, and a selective
  • adsorbent section 136 consists of about 40 mg of Duolite A7 dispersed throughout plasticizer-treated cellulose acetate tow 142 cut to deliver a section 136 about 10
  • the filter is attached to a tobacco rod having a length of about 56.5 mm and containing about 617 mg of a typical non-menthol cigarette blend wrapped
  • Example 2 A cigarette 210 with a multiple section filter 230 is prepared with the section orientations as shown in Figure 3 wherein the filter plug 132, the
  • Example 1 the selective adsorbent section 136 of Example 1.
  • the filter is attached to a
  • tobacco rod having a length of about 56.5 mm and containing about 617 mg of a
  • the cigarette delivers about 10.0 mg tar per cigarette.
  • Example 3 Cigarettes are prepared as in Example 1 except that about 20
  • Duolite A7 is used in the selective adsorbent section 136 instead of 40 mg.
  • cigarette delivers about 10.2 mg tar per cigarette.
  • Cigarettes are prepared as in Example 2 except that about 20 mg Duolite A7 is used in the selective adsorbent section 136 instead of 40 mg.
  • cigarette delivers about 10.9 mg tar per cigarette.
  • Example 5 Cigarettes are prepared as in Example 1 except that about 60
  • Duolite A7 is used in the selective adsorbent section 136 instead of 40 mg.
  • the cigarette delivers about 10.0 mg tar per cigarette.
  • Example 6 Cigarettes are prepared as in Example 2 except that about 60
  • Duolite A7 is used in the selective adsorbent section 136 instead of 40 mg.
  • the cigarette delivers about 10.3 mg tar per cigarette.
  • Cigarettes are prepared as in Example 1 except that about 69 mg of a mineral-based charcoal made from semi-anthracite coal is used in the general adsorbent section 136 instead of 40 mg of activated coconut charcoal.
  • cigarette delivers about 10.1 mg tar per cigarette.
  • Example 8 Cigarettes are prepared as in Example 2 except that about 69
  • cigarette delivers about 10.2 mg tar per cigarette.
  • Example 9 Representative cigarettes of Examples 1 - 6 are smoked to a
  • the vapor phase is collected in a bag and analyzed by GC/MS.
  • the data is
  • CA cellulose acetate filter plug
  • GA general adsorbent section
  • SA selective adsorbent section
  • Example 10 Representative cigarettes of Examples 7 and 8 are smoked to
  • the vapor phase is collected in a bag and analyzed by GC/MS.
  • the data is
  • the filter tow 142 when the adsorbents 144, 146 are dispersed within
  • the adsorbents 144, 146 may be packed within the filter plug material 142
  • plasticizer as the tow-dispersed adsorbents, the adsorbents would retain more
  • the filter plug, the general adsorbent section, and the selective adsorbent section may vary in length

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

La présente invention concerne un filtre de cigarette comportant une portion de filtre multiple qui réduit le niveau de constituants de fumée prédéterminés. Le filtre (130) est constitué d'un tampon de filtre fibreux (132) situé à l'extrémité bouche de la cigarette, une portion (136) renfermant un matériau d'absorption sélective, et une portion (134) renfermant un matériau d'absorption générale. Le matériau d'absorption sélective, tel qu'une matrice de résine phénolique formaldéhyde à surface fonctionnalisée avec essentiellement des groupes fonctionnels d'amines primaires et secondaires, élimine des constituants déterminés de fumée à partir de la fumée de tabac. Le matériau d'absorption générale, tel que du charbon actif, est, de préférence apte à absorber une gamme de composés chimique sans un degré élevé de spécificité. Du point de vue structurel, le tampon de filtre fibreux, la portion d'absorption sélective, et la portion d'absorption générale sont en alignement coaxial en tandem.
EP02756831A 2001-08-01 2002-07-30 Filtre de cigarette Expired - Lifetime EP1411784B8 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US30943501P 2001-08-01 2001-08-01
US30938801P 2001-08-01 2001-08-01
US309435P 2001-08-01
US309388P 2001-08-01
US11841 2001-10-30
US10/011,841 US20030066539A1 (en) 2001-08-01 2001-10-30 Cigarette Filter
PCT/US2002/024240 WO2003015544A1 (fr) 2001-08-01 2002-07-30 Filtre de cigarette

Publications (3)

Publication Number Publication Date
EP1411784A1 true EP1411784A1 (fr) 2004-04-28
EP1411784B1 EP1411784B1 (fr) 2011-10-12
EP1411784B8 EP1411784B8 (fr) 2012-03-07

Family

ID=27359516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02756831A Expired - Lifetime EP1411784B8 (fr) 2001-08-01 2002-07-30 Filtre de cigarette

Country Status (27)

Country Link
US (2) US20030066539A1 (fr)
EP (1) EP1411784B8 (fr)
JP (1) JP4028483B2 (fr)
KR (1) KR100838207B1 (fr)
CN (1) CN100496312C (fr)
AP (1) AP2134A (fr)
AR (1) AR034967A1 (fr)
AT (1) ATE527901T1 (fr)
AU (1) AU2002322811B2 (fr)
BR (1) BR0211853B1 (fr)
CA (1) CA2454820C (fr)
EA (1) EA005323B1 (fr)
EG (1) EG23137A (fr)
ES (1) ES2375106T3 (fr)
HR (1) HRP20040166B1 (fr)
HU (1) HUP0401565A3 (fr)
IL (2) IL160150A0 (fr)
MX (1) MXPA04001044A (fr)
MY (1) MY128508A (fr)
NO (1) NO20040452L (fr)
NZ (1) NZ531256A (fr)
OA (1) OA12647A (fr)
PL (1) PL200589B1 (fr)
RS (1) RS51032B (fr)
TW (1) TWI239237B (fr)
WO (1) WO2003015544A1 (fr)
ZA (1) ZA200401077B (fr)

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HUP0401565A3 (en) 2012-09-28
CN100496312C (zh) 2009-06-10
MXPA04001044A (es) 2004-06-22
ES2375106T3 (es) 2012-02-24
AP2004002985A0 (en) 2004-03-31
OA12647A (en) 2006-06-16
IL160150A0 (en) 2004-07-25
KR100838207B1 (ko) 2008-06-13
RS11204A (en) 2007-02-05
CN1553777A (zh) 2004-12-08
TWI239237B (en) 2005-09-11
PL200589B1 (pl) 2009-01-30
HRP20040166A2 (en) 2004-08-31
IL160150A (en) 2008-03-20
AR034967A1 (es) 2004-03-24
NO20040452L (no) 2004-03-29
KR20040026699A (ko) 2004-03-31
AU2002322811B2 (en) 2006-03-09
AP2134A (en) 2010-07-13
EA200400191A1 (ru) 2004-06-24
EP1411784B1 (fr) 2011-10-12
CA2454820C (fr) 2007-06-05
HRP20040166B1 (hr) 2013-11-22
PL368136A1 (en) 2005-03-21
CA2454820A1 (fr) 2003-02-27
BR0211853A (pt) 2004-09-08
RS51032B (sr) 2010-10-31
ZA200401077B (en) 2005-06-29
NZ531256A (en) 2005-07-29
WO2003015544A1 (fr) 2003-02-27
HUP0401565A2 (hu) 2004-11-29
BR0211853B1 (pt) 2011-11-29
JP4028483B2 (ja) 2007-12-26
JP2004538016A (ja) 2004-12-24
EP1411784B8 (fr) 2012-03-07
EA005323B1 (ru) 2005-02-24
MY128508A (en) 2007-02-28
US20040237984A1 (en) 2004-12-02
EG23137A (en) 2004-04-28
ATE527901T1 (de) 2011-10-15
US20030066539A1 (en) 2003-04-10

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