EP2003996A2 - Articles de fumeur comportant des éléments de filtre magnétiques - Google Patents

Articles de fumeur comportant des éléments de filtre magnétiques

Info

Publication number
EP2003996A2
EP2003996A2 EP07789604A EP07789604A EP2003996A2 EP 2003996 A2 EP2003996 A2 EP 2003996A2 EP 07789604 A EP07789604 A EP 07789604A EP 07789604 A EP07789604 A EP 07789604A EP 2003996 A2 EP2003996 A2 EP 2003996A2
Authority
EP
European Patent Office
Prior art keywords
filter
cigarette
particles
filter element
magnetic
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
EP07789604A
Other languages
German (de)
English (en)
Other versions
EP2003996B1 (fr
Inventor
Shalva Gedevanishvili
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.)
Philip Morris Products SA
Original Assignee
Philip Morris Products SA
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 Philip Morris Products SA filed Critical Philip Morris Products SA
Publication of EP2003996A2 publication Critical patent/EP2003996A2/fr
Application granted granted Critical
Publication of EP2003996B1 publication Critical patent/EP2003996B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • 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
    • A24D3/046—Tobacco smoke filters characterised by their shape or structure with electrical or magnetical filtering means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/52—Incorporating filters or mouthpieces into a cigarette rod or a tobacco rod
    • 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
    • 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
    • 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 filter element comprises filter material, particles of a magnetized adsorbent material, and at least one magnetic substrate.
  • the particles of the magnetized adsorbent are incorporated throughout the filter material.
  • the at least one magnetic substrate preferably has a magnetic field strength effective to attract the magnetized adsorbent particles and/or fragments of the magnetized adsorbent particles that are entrained in the mainstream smoke of a cigarette. Via magnetic attraction, a magnetic substrate can trap the magnetized adsorbent particles or fragments thereof within the filter element.
  • the at least one magnetic substrate can reduce the amount of magnetized adsorbent particles that issue from the mouth end of the cigarette during smoking.
  • the magnetized adsorbent material comprises particles of a magnetic material incorporated in particles of an adsorbent material.
  • An exemplary magnetized adsorbent material comprises particles of iron and/or an oxide of iron incorporated in particles of activated carbon.
  • the magnetized adsorbent can have an average particle size suitable for incorporation in the filter element of a cigarette (e.g., less than about 5 mm).
  • the at least one magnetic substrate preferably has at least one dimension of greater than about 1 mm or greater than about 2 mm.
  • the at least one magnetic substrate can be in the shape of beads, a disc, ring, cylinder, ribbon, foil, mesh or rod.
  • the magnetic substrate can comprise a permanent magnet or an electromagnet.
  • Preferred magnetic substrates consist essentially of a ferrite magnet, a neodymium iron boron magnet, a samarium cobalt magnet, an aluminum nickel cobalt magnet or an electromagnet.
  • the at least one magnetic substrate can have a Curie temperature of at least about 300 0 C.
  • the at least one magnetic substrate can be incorporated at least partially around the filter material.
  • the at least one magnetic substrate can be disposed on an inner surface of plug wrap that is used to wrap the filter material.
  • the at least one magnetic substrate can be incorporated into one or more filter parts selected from the group consisting of a shaped paper insert, a plug, a space between plugs, cigarette filter paper, a cellulose acetate sleeve, a polypropylene sleeve and a free-flow sleeve.
  • the magnetized adsorbent particles and/or the at least one magnetic substrate can be incorporated in the filter material prior to forming the filter material into the filter rod.
  • An exemplary cigarette comprises a tobacco rod wrapped in cigarette paper, which is attached to the filter element with tipping paper.
  • the at least one magnetic substrate can be adapted to reduce the amount of magnetized adsorbent particles or fragmented magnetized adsorbent particles entrained in the mainstream smoke of the cigarette.
  • the at least one magnetic substrate can be incorporated axially between the filter element and the tobacco rod.
  • a cigarette comprising the filter element can further comprise magnetized adsorbent particles incorporated in the tobacco rod and/or cigarette paper used to form the cigarette.
  • a method of making a filter element comprising filter material, magnetized adsorbent particles and at least one magnetic substrate comprises: (i) providing filter material and plug wrap material; (ii) forming the filter material into a filter rod; (iii) incorporating the magnetized adsorbent particles and the at least one magnetic substrate in and/or on at least one of the filter rod and the plug wrap material; and (iv) wrapping the filter rod in the plug wrap material to form the filter element.
  • the magnetized adsorbent particles and/or the at least one magnetic substrate can be incorporated in the filter material prior to forming the filter material into the filter rod.
  • the method can comprise forming the at least one magnetic substrate at least partially around the filter rod prior to wrapping the filter rod in the plug wrap, and/or incorporating the at least one magnetic substrate on an interior surface of the plug wrap prior to wrapping the filter rod in the plug wrap.
  • Filter rods for making cigarette filters which can be attached to tobacco rods (e.g., attached with tipping paper) to produce filter cigarettes, can be made by forming a bundle or tow of filter material into a rod using a rod forming apparatus.
  • a filter rod comprises up to thirty thousand filaments of filter material.
  • a preferred filter material used to form a filter rod is cellulose acetate, which is a cellulose ester.
  • the at least one magnetic substrate can be incorporated into one or more cigarette filter parts selected from the group consisting of a shaped paper insert, a plug, a space between plugs, cigarette filter paper, a cellulose acetate sleeve, a polypropylene sleeve, and a free-flow sleeve.
  • the filter element can be attached to a tobacco rod to form a filter cigarette.
  • a cut filler composition can be combined with other cigarette additives and provided to a cigarette-making machine to produce a tobacco column, which is then wrapped in cigarette paper to form a tobacco rod that is cut into sections, and optionally tipped with a filter.
  • the resulting cigarettes can be manufactured to desired specifications using standard or modified cigarette making techniques and equipment.
  • Cigarettes may range from about 50 mm to about 120 mm in length. The circumference is typically from about 15 mm to about 30 mm, preferably around 25 mm.
  • the tobacco packing density is typically between the range of about 100 mg/cm 3 to about 300 mg/cm 3 , and preferably about 150 mg/cm 3 to about 275 mg/cm 3 .
  • Tobacco cut filler is normally in the form of shreds or strands cut into widths ranging from about 1/4 cm to about 1/8 cm (about 1/10 inch to about 1/20 inch) or even 1/16 cm (1/40 inch).
  • the lengths of the strands range from between about 0.65 cm to about 7.6 cm (about 0.25 inches to about 3.0 inches).
  • the cigarettes may further comprise one or more flavorants or other additives (e.g., burn additives, combustion modifying agents, coloring agents, binders, etc.).
  • magnetized adsorbent particles can be filtered from mainstream smoke via magnetic attraction to the one or more magnetic substrates that are incorporated in the filter element.
  • filter is meant that the magnetic substrate can magnetically attract and trap the magnetized adsorbent particles and/or fragments of the magnetized adsorbent particles within the filter element.
  • a magnetic substrate can substantially reduce the amount of magnetized adsorbent particles (e.g., magnetized activated carbon particles) issuing from the mouth end of a cigarette during smoking.
  • a magnetic substrate in the shape of a sheet (e.g., magnetic foil) or mesh (e.g., perforated magnetic foil) can be formed around a filter rod that is in turn wrapped in cigarette paper (e.g., plug wrap) to form the filter element.
  • the sheet or mesh can be first combined with the plug wrap to form a laminate that is wrapped around the filter rod to form the filter element.
  • An adhesive can be used to secure the magnetic substrate to the filter rod and/or the plug wrap.
  • a magnetic foil-laminated plug wrap is adapted to be formed around a filter rod such that the magnetic foil is positioned on the inner surface of the plug wrap (e.g., in contact with the filter material).
  • the adsorbent particles can be selected to have an appropriate surface area to preferentially adsorb selected constituents from cigarette smoke.
  • activated carbon typically has a surface area greater than about 50 m 2 /g (e.g., at least about 100 m 2 /g, 200 m 2 /g, 500 m 2 /g, 1000 m 2 /g or 2000 m 2 /g).
  • the absorptive capacity of the adsorbent particles increases with increasing surface area.
  • surface area typically increases with decreasing particle size.
  • adsorbent particles having a small particle size may pack together too densely to permit mainstream smoke to flow through the filter with desired resistance to draw (RTD) during smoking.
  • adsorbent particles such as activated carbon particles may be combined with solid magnetic particles optionally using a binder to improve the adhesion between the adsorbent particles and the magnetic particles.
  • magnetized adsorbent particles can be formed by impregnating PICA carbon with an aqueous solution of iron nitrate at room temperature to form a mixture.
  • the pressure over the mixture can be reduced (e.g., to about 2 mm Hg) to improve infiltration of the iron nitrate solution in to the pores of the carbon.
  • the infiltrated carbon particles can be washed to remove excess iron nitrate from the particles, and then dried prior to heating to decompose the iron nitrate.
  • magnetic particles of iron oxide Fe 2 O 3
  • the magnetized adsorbent particles can be incorporated into or onto a support such as paper (e.g., liner, plug wrap or tipping paper) that is located along a filter portion of a cigarette.
  • the magnetized adsorbent particles can also be loaded onto a support such as lightly or tightly folded paper inserted into a hollow portion of the cigarette filter.
  • the support is preferably in the form of a sheet material such as crepe paper, filter paper, or tipping paper.
  • suitable support materials such as organic or inorganic cigarette compatible materials can also be used.
  • the magnetized adsorbent particles can be incorporated in cigarette paper and/or filter material by spraying or otherwise coating the particles onto the base material.
  • magnetized adsorbent particles can be incorporated in cigarette paper by spray coating the magnetized adsorbent particles onto a wet base (e.g., cellulosic) web, an intermediate web or a finished web.
  • slurry e.g., aqueous slurry
  • Magnetized adsorbent particles in the form of a dry powder can be physically admixed with cigarette paper and/or filter material during the manufacturing process.
  • magnetic beads can be incorporated into the filter element as a gas permeable bed.
  • a magnetic substrate may be incorporated into more than one component of a filter element such as by being incorporated into a void space as a bed of packed particles.
  • Figure 2 shows a cigarette 2 comprised of a tobacco rod 4 and filter element 6. This arrangement is similar to that of Figure 1 except the magnetic beads 10 are incorporated in a space 20 of the filter element. Preferably, space 20 is free of cellulose acetate and is located at or near the distal end of the cigarette. As in Example 1 , the tobacco rod 4 and filter element 6 can be joined together with tipping paper (not shown).
  • a magnetic substrate such as one or more magnetic rods, can be incorporated into the filter material such that the filter material substantially surrounds the magnetic substrate.
  • the magnetic rods 50 are disposed axially within the filter rod such that the filter material substantially surrounds the magnetic rods.
  • Cigarette 2 comprises tobacco rod 4, magnetized adsorbent particles 9 incorporated within the filter rod, and a magnetic mesh 60 external to the filter rod.
  • a filter overwrap is preferably wrapped around both the filter rod and the magnetic mesh.
  • the magnetized adsorbent particles and/or the magnetic substrate can affect the organoleptic properties (e.g., aroma and/or taste) of mainstream smoke. Both the magnetized adsorbent particles and the magnetic substrate can change the chemical composition of mainstream gas that flows through a filter element. For example, the magnetized adsorbent particles can adsorb one or more gas phase constituents.
  • the magnetized adsorbent particles comprise magnetic particles incorporated within the adsorbent particles.
  • the magnetic particles which can be elemental metals (e.g., iron) or compound oxides (e.g., iron oxides), can affect the concentration of one or more gas phase constituents of mainstream smoke.
  • the magnetic particles which can comprise nanoscale particles, can catalyze the conversion of one or more gas phase constituents during the smoking of a cigarette.
  • a catalyst can affect the rate of a chemical reaction without participating as a reactant or product of the reaction.
  • the magnetic particles which are preferably capable of acting as both an oxidant and as a catalyst (e.g., low temperature or near-ambient temperature catalyst) for the conversion of carbon monoxide to carbon dioxide and/or nitric oxide to nitrogen, and can reduce the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette during smoking.
  • the amount of magnetized adsorbent particles can be selected such that the amount of carbon monoxide and/or nitric oxide in mainstream smoke is reduced during smoking of a cigarette.
  • a filter element can comprise a mixture of different magnetized adsorbent particles.
  • the composition of the magnetized adsorbent particles i.e., the stoichiometry and/or size of the catalyst particles and/or the stoichiometry and/or size of the adsorbent particles
  • the composition of the magnetized adsorbent particles can be selected to adsorb, catalyze and/or reduce gas phase constituents of mainstream smoke in a given temperature range.
  • Yet another embodiment provides a method of treating mainstream smoke of a cigarette comprising a filter element.
  • "Smoking" of a cigarette means the heating or combustion of the cigarette to form smoke, which can be drawn through the cigarette.
  • smoking of a cigarette involves lighting one end of the cigarette and, while the tobacco contained therein undergoes a combustion reaction, drawing smoke from the combustion through the mouth end of the filter element.
  • the cigarette may also be smoked by other means.
  • the cigarette may be smoked by heating the cigarette and/or heating using electrical heater means as described in commonly-assigned U.S. Patent Nos. 6,053,176; 5,934,289; 5,591 ,368 or 5,322,075.
  • a method of making a filter element comprising filter material, magnetized adsorbent particles and at least one magnetic substrate comprises (i) providing filter material and plug wrap material; (ii) forming the filter material into a filter rod; (iii) incorporating the magnetized adsorbent particles and the at least one magnetic substrate in and/or on at least one of the filter rod and the plug wrap material; and (iv) wrapping the filter rod in the plug wrap material to form the filter element.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
EP07789604A 2006-03-31 2007-04-02 Articles de fumeur comportant des éléments de filtre magnétiques Not-in-force EP2003996B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US78750606P 2006-03-31 2006-03-31
PCT/IB2007/002237 WO2007132356A2 (fr) 2006-03-31 2007-04-02 Articles de fumeur comportant des éléments de filtre magnétiques

Publications (2)

Publication Number Publication Date
EP2003996A2 true EP2003996A2 (fr) 2008-12-24
EP2003996B1 EP2003996B1 (fr) 2010-08-25

Family

ID=38694282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07789604A Not-in-force EP2003996B1 (fr) 2006-03-31 2007-04-02 Articles de fumeur comportant des éléments de filtre magnétiques

Country Status (10)

Country Link
US (1) US20070235046A1 (fr)
EP (1) EP2003996B1 (fr)
JP (1) JP2009531057A (fr)
KR (1) KR20090008237A (fr)
AT (1) ATE478573T1 (fr)
BR (1) BRPI0709696A2 (fr)
DE (1) DE602007008705D1 (fr)
EA (1) EA012564B1 (fr)
UA (1) UA92214C2 (fr)
WO (1) WO2007132356A2 (fr)

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Publication number Publication date
EP2003996B1 (fr) 2010-08-25
UA92214C2 (ru) 2010-10-11
WO2007132356A3 (fr) 2008-03-20
EA012564B1 (ru) 2009-10-30
JP2009531057A (ja) 2009-09-03
BRPI0709696A2 (pt) 2011-07-19
WO2007132356A2 (fr) 2007-11-22
ATE478573T1 (de) 2010-09-15
US20070235046A1 (en) 2007-10-11
DE602007008705D1 (de) 2010-10-07
KR20090008237A (ko) 2009-01-21
EA200870399A1 (ru) 2009-04-28

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