JP2009531057A - Smoking articles including magnetic filter elements - Google Patents

Smoking articles including magnetic filter elements Download PDF

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JP2009531057A
JP2009531057A JP2009502259A JP2009502259A JP2009531057A JP 2009531057 A JP2009531057 A JP 2009531057A JP 2009502259 A JP2009502259 A JP 2009502259A JP 2009502259 A JP2009502259 A JP 2009502259A JP 2009531057 A JP2009531057 A JP 2009531057A
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filter
cigarette
filter element
particles
magnetic
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シャルヴァ ゲデヴァニッシュヴィリ
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フィリップ・モーリス・プロダクツ・ソシエテ・アノニム
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Application filed by フィリップ・モーリス・プロダクツ・ソシエテ・アノニム filed Critical フィリップ・モーリス・プロダクツ・ソシエテ・アノニム
Priority to PCT/IB2007/002237 priority patent/WO2007132356A2/en
Publication of JP2009531057A publication Critical patent/JP2009531057A/en
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    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/04Tobacco smoke filters characterised by their shape or structure
    • A24D3/046Tobacco smoke filters characterised by their shape or structure with electrical or magnetical filtering means
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/06Use of materials for tobacco smoke filters
    • A24D3/16Use of materials for tobacco smoke filters of inorganic materials

Abstract

A filter element adapted to be incorporated into a cigarette with a filter, a cigarette including the filter element, and a method of manufacturing the filter element.
A filter element (6) adapted to be incorporated into a filter cigarette (2) comprises a filter material (8), particles of magnetized adsorbent (9), and at least one magnetic substrate (10). . During smoking of the cigarette (2) containing the filter element (6), at least one magnetic substrate (10) filters the magnetized adsorbent particles (9) or their debris within the filter element (6) (ie magnetic force). Can be attracted and captured).
[Selection] Figure 1

Description

Cigarettes typically include a filter element that may incorporate an adsorbent material such as carbon. Filter elements adapted to be incorporated into filter cigarettes are, for example, particles of carbon such as activated carbon or activated charcoal and / or other adsorbent materials incorporated in cellulose acetate tow or in cavities between cellulose acetate materials. Or it can contain granules.
During cigarette smoke absorption, it is believed that adsorbent particles or adsorbent particle debris can exit through (ie, break through) the cigarette lip end, possibly accompanied by mainstream smoke. Insofar as techniques for reducing the amount of adsorbent particles in mainstream smoke will be relevant.

US Pat. No. 5,143,098 US Pat. No. 6,053,176 US Pat. No. 5,934,289 US Pat. No. 5,591,368 US Pat. No. 5,322,075

Disclosed is a filter element that is adapted to be incorporated into a cigarette with a filter, as well as a cigarette that includes the filter element. The filter element includes a filter material, particles of magnetized adsorption material, and at least one magnetic substrate. In a preferred filter element, the magnetized adsorbent particles are incorporated throughout the filter material.
The at least one magnetic substrate preferably has a magnetic field strength effective to attract magnetized adsorbent particles and / or debris of magnetized adsorbent particles entrained in cigarette mainstream smoke. Due to the magnetic attraction, the magnetic substrate can capture the magnetized adsorbent particles or fragments thereof within the filter element. Thus, in a cigarette that includes a filter element, at least one magnetic substrate can reduce the amount of magnetized adsorbent particles that are ejected from the labial end of the cigarette during smoking.

Magnetized adsorptive material includes particles of magnetic material incorporated into the particles of adsorbent material. Exemplary magnetized adsorbent materials include iron particles and / or iron oxides incorporated into activated carbon particles. The magnetized adsorbent can have an average particle size (eg, less than about 5 mm) suitable for incorporation into a cigarette filter element.
The at least one magnetic substrate preferably has at least one dimension that is greater than about 1 mm or greater than about 2 mm. The at least one magnetic substrate can be in the form of a bead, disk, ring, cylinder, ribbon, foil, mesh, or rod. The magnetic substrate can include a permanent magnet or an electromagnet. Preferred magnetic substrates consist essentially of ferrite magnets, neodymium iron boron magnets, samarium cobalt magnets, aluminum nickel cobalt magnets, or electromagnets. The at least one magnetic substrate can have a Curie temperature of at least about 300 ° C.

  In an exemplary embodiment, the at least one magnetic substrate can be at least partially incorporated around the filter material. For example, at least one magnetic substrate can be disposed on the inner surface of a plug wrap used to wrap the filter material. In yet another exemplary embodiment, the at least one magnetic substrate is one selected from the group consisting of a paper insert, a plug, a space between plugs, a cigarette filter paper, a cellulose acetate sleeve, a polypropylene sleeve, and a free-flowing sleeve. Or it can be incorporated into more filter parts. Magnetized adsorbent particles and / or at least one magnetic substrate can be incorporated into the filter material prior to forming the filter material into a filter rod.

  An exemplary cigarette includes a tobacco rod wrapped in cigarette paper and attached to the filter element using tip paper. The at least one magnetic substrate may be adapted to reduce the amount of magnetized adsorbent particles or fragmented magnetized adsorbent particles entrained in the cigarette mainstream smoke. At least one magnetic substrate can be incorporated axially between the filter element and the tobacco rod. Cigarettes containing filter elements can further include magnetized adsorbent particles incorporated into the tobacco rod and / or cigarette paper used to form the cigarette.

  In preferred cigarettes, the magnetized adsorbent particles and / or at least one magnetic substrate can be adapted to alter the chemical composition of mainstream smoke flowing through the filter element during cigarette smoking. In embodiments, the magnetized adsorbent particles can adsorb one or more gas phase components in mainstream smoke. In yet another embodiment, the magnetized adsorbent particles can catalyze the conversion of one or more gas phase components within the mainstream smoke. As an example, in a cigarette that includes a filter element, the magnetic particles incorporated in the magnetized adsorbent particles may catalyze the conversion of carbon monoxide to carbon dioxide and / or nitrogen oxide to nitrogen during cigarette smoke. it can.

A method of treating cigarette smoke includes the steps of heating or igniting a cigarette to form smoke and sucking smoke through the cigarette, wherein the magnetized particles and / or debris of the magnetized particles entrained in the smoke are at least It is attracted to one magnetic substrate by a magnetic force and captured by the filter element.
A method of manufacturing a filter element comprising a filter material, magnetized adsorbent particles, and at least one magnetic substrate includes (i) providing a filter material and a plug wrap material, and (ii) forming the filter material on a filter rod. (Iii) incorporating magnetized adsorbent particles and at least one magnetic substrate into and / or on at least one of the filter rod and plug wrap material; and (iv) wrapping the filter rod in the plug wrap material and the filter element Forming a step. Magnetized adsorbent particles and / or at least one magnetic substrate can be incorporated into the filter material prior to forming the filter material into a filter rod. The method includes at least partially forming at least one magnetic substrate around the filter rod before wrapping the filter rod in the plug wrap and / or before wrapping the filter rod in the plug wrap. Incorporating at least one magnetic substrate on the inner surface of the paper can be included.

Disclosed is a filter element designed to be incorporated into a cigarette with a filter. The filter element includes a cigarette filter material, particles of magnetized adsorption material, and at least one magnetic substrate. During smoke absorption of the cigarette containing the filter element, the magnetic substrate can attract the magnetized adsorbent particles and / or debris of the magnetized adsorbent particles to trap the magnetized adsorbent particles within the filter element.
The term “magnetic substrate” as used herein preferably means a monolithic magnetic material having at least one dimension of at least 1 mm. For example, the magnetic substrate can include a length, width, thickness, and / or diameter of at least 1 mm. In general, the magnetic field strength of a permanent magnet made of a specific magnetic material is proportional to the magnet size (eg, volume). A preferred magnetic substrate is sized and shaped to be an effective filter for magnetized adsorbent particles during cigarette smoke containing filter elements. The magnetic substrate can have any size and shape suitable for incorporation into a filter element.

  Exemplary magnetic substrates can include one or more magnetic beads. Preferred magnetic beads can have an average particle size greater than 1 mm (eg, at least 2 mm, 3 mm, 4 mm, or 5 mm). The shape of the magnetic beads can be substantially spherical or non-spherical. More preferred magnetic substrates can be in the form of disks, rings, cylinders, ribbons, foils, meshes, or rods. In embodiments where the magnetic substrate is a rod or cylinder, the length of the rod or cylinder is preferably greater than 4 times its diameter.

The filter element can include a magnetic substrate made of any magnetic material that can attract and trap magnetized adsorbent particles. In an exemplary embodiment, the magnetic material used to form the magnetic substrate is a ferrite magnet (eg, a magnet composition comprising oxide ions and strontium oxide or barium oxide), a neodymium iron boron (NdFeB) magnet, samarium cobalt. Selected from the group consisting of magnets (eg, SmCo 5 , Sm 2 Co 17, etc.), aluminum nickel cobalt magnets (eg, alloys of aluminum, nickel, cobalt, and iron), and mixtures thereof.

  The magnetic substrate can include an electromagnet or a permanent magnet. In embodiments where the magnetic substrate is an electromagnet, a power source can be used to magnetize the electromagnet and send current to the electromagnet. The magnetic strength of the permanent magnet can vary with temperature. In general, the spontaneous magnetization of a magnetic material decreases with increasing temperature. The temperature above which there is no possibility of spontaneous magnetization in the magnetic substrate is known as the Curie temperature. Therefore, the effective filtration temperature range of a magnetic substrate made of permanent magnets is lower than its Curie temperature. The Curie temperature of neodymium iron boron magnets generally ranges from about 300 ° C to about 350 ° C. Samarium cobalt magnets and aluminum nickel cobalt magnets typically have Curie temperatures in the range of about 750 ° C. to about 800 ° C. and about 800 ° C. to about 900 ° C., respectively. Preferably, the magnetic substrate is made of a material having a sufficiently high Curie temperature to retain magnetic properties during cigarette smoke. In a preferred embodiment, the magnetic substrate has a Curie temperature greater than about 300 ° C.

  The magnetic substrate can be a sintered material that is a sufficiently dense monolith or a partially dense monolith. Thus, the magnetic substrate can comprise a monolith having an amount of 100% or less of its theoretical density (eg, at least about 50%, 60%, 70%, 80%, or 90% dense magnet). An exemplary magnetic substrate can be a sufficiently dense ring or disk shape of magnetic material, or a magnetic substrate can be a porous (eg, gas permeable) ring or disk shape.

  The filter element is adapted to be incorporated into a filter cigarette. Cigarette filters are made with a wide range of designs. In general, cigarette filters are filter tows, such as cellulose acetate fibers or bundles of paper containing bundles of filters, plasticizers (ie, softeners added together to continuous fiber rods to bind the filter fibers), It includes four main components: plug wrap (ie, the wrap used to contain the filter material) and adhesive used to secure the plug wrap to the continuous filter rod.

  A filter rod for manufacturing a cigarette filter that is attached to a tobacco rod to produce a cigarette with a filter (e.g., attached using tipping paper) is a rod forming device that uses a rod forming device to rod a bundle or tow of filter material. It can manufacture by forming in. Typically, the filter rod contains 30,000 filaments of filter material. A preferred filter material used to form the filter rod is cellulose acetate, which is a cellulose ester. Cigarette filter rods also include other cellulose ester fibers (eg, cellulose triacetate), regenerated cellulose (eg, rayon), polyamide fibers (eg, nylon), polyimide fibers, acrylic fibers, polyester fibers, polycarbonate fibers, polyethylene fibers, It can be made of polyvinyl chloride fiber, filament polyolefin material, polypropylene fiber, wood pulp fiber, cotton, flux, jute, wool, silk, ramie, protein fiber, and paper. Cigarette filter rods can be formed from combinations of these materials.

Conventionally, a plasticizer or binder such as triacetin is added to the tow before it is passed through the rod forming device. Furthermore, the tow can be spread and fluffed or “flowered”, usually by placing the tow under tension and passing over an air jet. The flowered tow can pass through a funnel or other contraction device and then through a forming opening to form a filter rod.
Plasticizers added to the tow during or after flowering can enhance the binding of the filaments to each other at the intersection when the tow is collected. Thus, the addition of a plasticizer can enhance the firmness of the rod made of tow. The plasticizer can also have filtration properties. The finished filter rod attributes (eg, filtration efficiency, stiffness, dimensional stability, etc.) can be improved by curing (eg, heating) the plasticizer.

  The filter rod can be provided with an outer layer (eg, plug wrap paper) to retain its shape. The outer layer can include cigarette paper or other sheet material wrapping paper. Cigarette wrapping paper can be any wrapping paper suitable for enclosing the filter material, including wrapping paper containing flux, cannabis, bombay hemp, african grass, rice straw, cellulose, and the like. Cigarette wrapping paper can include optional filter materials, flavor additives, and flammable additives. The wrapping paper is in cross-section as in a two-layer wrapping paper as described in commonly owned US Pat. No. 5,143,098, the entire disclosure of which is incorporated herein by reference. There can be more than one layer.

  A wide variety of filter configurations can be used to form the filter elements. Exemplary filter structures include, but are not limited to, mono filters, dual filters, triple filters, cavity filters, embedded filters, free flow filters, or combinations thereof. Monofilters usually comprise cellulose acetate tow or cellulose paper material. Pure monocellulose filters or paper filters can be easily made biodegradable with filters that are effective against tar and / or nicotine. Dual filters typically include a cellulose acetate labial end and pure cellulose or cellulose acetate segments. The length and pressure drop of the dual filter segments can be adjusted to provide the desired filtration (ie adsorption and / or absorption) and suction resistance (RTD). The triple filter can include a labial and tobacco side segment and an intermediate segment comprising paper. Cavity filters typically include two segments, for example acetate-acetate, acetate-paper, or paper-paper. The implantable filter includes an open cavity at the labial end. The filter element can be vented and / or contain a flavoring catalyst or other additive suitable for use with the filter element.

  The magnetic substrate can be incorporated into the filter element in several ways. The magnetic substrate can be incorporated into the filter material before, during and / or after manufacture of the filter rod. For example, the magnetic substrate can be incorporated into the filter material used to form the filter rod and / or incorporated into the preformed filter rod. The magnetic substrate is incorporated into the filter rod so that the magnetic substrate is substantially surrounded by the filter material, or in alternative embodiments, the magnetic substrate may be formed wholly or partially around the filter rod. Can do. In yet another embodiment, the magnetic substrate can be incorporated into a space or cavity within the filter rod. The at least one magnetic substrate includes one or more cigarette filter elements selected from the group consisting of a paper insert, a plug, a space between plugs, a cigarette filter paper, a cellulose acetate sleeve, a polypropylene sleeve, and a free-flow sleeve. Can be incorporated into.

The filter element can be attached to a tobacco rod to form a filtered cigarette. In cigarette production, the cut filler composition is combined with other cigarette additives and fed to a cigarette making machine for producing tobacco columns, which are then wrapped in cigarette paper and cut into compartments. And optionally a tobacco rod with a filter attached to the tip. The resulting cigarette can be manufactured to the desired specifications using standard or modified cigarette manufacturing techniques and equipment. The cigarette length can range from about 50 mm to about 120 mm. The perimeter is usually about 15 mm to about 30 mm, preferably around 25 mm. The tobacco packing density can usually range from about 100 mg / cm 3 to about 300 mg / cm 3 , preferably from about 150 mg / cm 3 to about 275 mg / cm 3 .

  Tobacco cut fillers are often cut to 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). Strips or threads. The yarn length is distributed between about 0.65 cm to about 7.6 cm (about 0.25 inches to about 3.0 inches). The cigarette can further include one or more flavorings or other additives (eg, flammable additives, combustion modifiers, colorants, binders, etc.).

  Any suitable tobacco mixture can be used in place of the cut filler. Examples of suitable types of tobacco materials include flue dry, Burley, Bright, Maryland, or 0 ricent tobacco. The tobacco material is provided in the form of tobacco leaves, treated tobacco material such as volume expanded or puffed tobacco, treated tobacco stem such as cut-rolled or cut-puffed stem, reconstituted tobacco material, or blends thereof. The Tobacco can also include substitutes.

The term "mainstream smoke" travels downstream through the tobacco rod and is a mixture of gases discharged through the filter end, i.e. discharged or sucked from the lip end of the cigarette during the cigarette smoke. Means a certain amount of smoke. Mainstream smoke contains smoke that is sucked not only through the cigarette wrapper but through the ignition area. The term “sidestream” smoke refers to smoke generated during static combustion.
In cigarettes that include a filter element, magnetized adsorbent particles can be filtered out of mainstream smoke by magnetic attraction against one or more magnetic substrates incorporated into the filter element. Filters have shown that a magnetic substrate can attract and trap magnetized adsorbent particles and / or debris of magnetized adsorbent particles in a filter element. Preferably, the magnetic substrate can substantially reduce the amount of magnetized adsorbent particles (eg, magnetized activated carbon particles) ejected from the lip side end of the cigarette during smoking. In a preferred cigarette, the filter element reduces the amount of magnetized adsorbent particles discharged from the labial end during cigarette smoke by at least about 10 wt% (eg, by weight) (eg, at least 20 wt%, 30 wt%). %, 40% by weight, 50% by weight, or more).

In alternative embodiments, at least one magnetic substrate can be distributed uniformly or non-uniformly throughout the filter element. For example, a larger amount of magnetic beads can be loaded into the tobacco rod end of the filter rod, the labial end, or the intermediate region between the tobacco rod end and the labial end. In a preferred example, a magnetic ring can be incorporated at the labial end of the filter rod.
One or more magnetic substrates can be incorporated into the hollow portion of the cigarette filter element. For example, some cigarette filters have a plug / space / plug configuration, where the plug includes a fibrous filter material and the space is just an air gap between two filter plugs. The void can be partially or totally filled with one or more magnetic substrates. A wrapped bed of magnetic substrate can be incorporated into such a gap. For example, a bed of magnetic beads can be placed in the space between the plugs of a standard cellulose acetate filter rod.

  One or more magnetic substrates can be incorporated into the filter element after the filter rod is formed. Illustratively, the magnetic substrate can be formed around a pre-formed filter rod. The magnetic ring can be formed (eg, crimped) around a pre-formed filter rod such that the ring has an outer diameter that is approximately equal to the outer diameter of the filter rod. The radial thickness and / or axial width of the magnetic ring can range from about 0.05 mm to about 1 mm or greater. For example, the magnetic ring can have a thickness and / or width of at least about 0.1 mm, 0.2 mm, 0.5 mm, 1 mm, or 2 mm. As yet another example, the magnetic substrate can be formed on the outer surface of a pre-formed filter rod before the rod is wrapped in cigarette paper (eg, plug wrap paper) to form a filter element. The magnetic rod or strip can be disposed axially along the outer surface of the filter rod, for example, between the filter rod and the plug wrap formed around the filter rod.

  In yet another example, a magnetic substrate in the form of a sheet (eg, magnetic foil) or mesh (eg, perforated magnetic foil) is then used to form cigarette paper (eg, plug wrap paper) to form a filter element. ) Can be formed around the filter rod. 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 plug wrap. Preferably, the magnetic foil laminated plug wrap is formed around the filter rod such that the magnetic foil is disposed on the inner surface of the plug wrap (eg, in contact with the filter material).

The magnetic substrate can be used alone in the filter element, whether formulated directly with the filter material, incorporated as a packaged bed, or incorporated after formation of the filter rod, or it can be a catalyst, flavor It can be incorporated with other known materials having gas phase activity, such as materials.
The size, distribution, and position of at least one magnetic substrate incorporated into the filter element by incorporating into and / or around the filter material is particularly dependent on the amount of magnetized adsorbent particles incorporated in the cigarette, mainstream smoke It can be determined by routine experimentation as a function of the amount of gas phase component to be removed from and / or the magnetic strength of the magnetic substrate.

In addition to the magnetic substrate, the filter element includes particles of magnetized adsorbent. Magnetized adsorbent particles include magnetic particles incorporated into adsorbent particles. By incorporating the magnetic particles into the adsorbent particles, the adsorbent particles can be attracted and captured within the filter element by the magnetic substrate. Usually, before the magnetic particles are incorporated into the adsorbent particles, the adsorbent particles are non-magnetic.
The adsorbent particles can include any suitable adsorbent medium. Exemplary adsorbents include molecular sieves such as zeolite, silica, silicate, alumina, and carbon (eg, activated carbon). A preferred adsorbent medium is activated carbon. “Activated carbon” means any porous, high surface area form of carbon. Activated carbon is derived by heat treatment of any suitable carbon source. The activity treatment usually increases the porosity and the activated carbon is provided with a wide range of pore sizes, or the pore size can be controlled to provide the desired pore size distribution.

  Particularly preferred activated carbon is commercially available (eg, from “PICA USA, Inc.”, Truth of Consequences, New Mexico). Activated carbon can also be produced by carbonization of coconut shells, coal, wood, pitch, peat, cellulose fibers, lignite, and olive pits. Carbonization is usually performed, for example, at an elevated temperature of 400-1000 ° C. in an inert atmosphere, followed by activation under reducing or oxidizing conditions (ie calcification). The activated carbon can be in the form of beads, granules, and / or fibers.

The adsorbent particles can include granulated particles having a size ranging from about 100 microns to about 5 mm. For example, the activated carbon particles can have an average size of about 0.2 mm to about 2 mm (eg, about 200 microns, 500 microns, 1000 microns, or 2000 microns).
The particles of adsorbent material can have any desired pore size distribution including pores such as micropores, mesopores, and macropores. The term “micropore” generally refers to a material having a pore size of about 20 angstroms or less, and the term “mesopore” generally comprises a pore size of about 20-500 angstroms. Material. The magnetic particles can be incorporated into the pores of the adsorbent by impregnation with organic precursor material, mechanical stirring, particularly pyrolysis or other techniques.

The adsorbent particles can be selected to have an appropriate surface area to preferentially adsorb selected components from cigarette smoke. For example, activated carbon typically has a surface area greater than about 50 m 2 / g (eg, at least about 100 m 2 / g, 200 m 2 / g, 500 m 2 / g, 1000 m 2 / g, or 2000 m 2 / g). Have. Usually, the absorption function of adsorbent particles increases with increasing surface area. Furthermore, the surface area typically increases with decreasing particle size. When used as a cigarette filter media, however, adsorbent particles having a small particle size are so dense that the mainstream smoke does not flow through the filter with the desired suction resistance (RTD) during smoking. Can be packed. On the other hand, if the particle size is too large, the surface area may be insufficient to achieve the desired degree of filtration. Therefore, such factors should be taken into account in the selection of adsorbent particles suitable for the filtration of mainstream and / or sidestream smoke.

Magnetized adsorbent particles preferably comprise particles of magnetic material incorporated into particles of adsorbent material. Magnetized adsorbent particles include a precursor (eg, a precursor solution) that is processed by combining the adsorbent particles with magnetic particles or by forming the adsorbent particles into magnetic particles within the pores of the adsorbent particles. It can be formed by combining.
According to one method, adsorbent particles such as activated carbon particles can optionally be combined with solid magnetic particles using a binder to improve the adhesion between the adsorbent particles and the magnetic particles.
According to yet another method, the adsorbent particles are immersed in an aqueous or non-aqueous solution containing a precursor compound that can be treated with chemical reactants and / or with heat to form magnetic particles. Can do. Preferred precursor compounds are iron salts that are treated with a reducing agent or with heat and can form particles of magnetic elemental iron and / or iron oxides. The precursor can be incorporated into the adsorbent particles in a single stage or multiple stages. The adsorbent particles can be filled with about 1 wt% to about 150 wt% magnetic particles.

  Magnetic particles can include nanoscale particles, whether combined with adsorbent particles or formed in situ within adsorbent particles by decomposition of precursor compounds. By “nanoscale” is meant that the magnetic particles have an average particle size of less than 1 micron. Nanoscale particles are 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, or 90 nm ± 5 nm, average up to about 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 800 nm, 900 nm ± 50 nm It can have a particle size.

As an example, magnetized adsorbent particles can be formed by impregnating an aqueous solution of iron nitrate with PICA carbon at room temperature to form a mixture. Optionally, the pressure across the mixture can be reduced (eg, up to about 2 mm Hg) to improve wetting of the iron nitrate solution to the carbon pores. The wet carbon particles can be washed to remove excess iron nitrate from the particles and then dried prior to heating to decompose the iron nitrate. Initially, iron oxide (Fe 2 O 3 ) magnetic particles can be formed by heating iron nitrate wet carbon particles in air at a temperature of about 350 ° C. Furthermore, heating in a reducing atmosphere (eg, a gas mixture containing carbon monoxide and helium) at a temperature between about 400-700 ° C. reduces Fe 2 O 3 and reduces Fe 3 O 4 and / or Fe. Magnetic particles can be formed.

  Magnetized adsorbent particles can be incorporated into the filter element in several ways. Magnetized adsorbent particles can be prepared in a dry powder, paste, or dispersed form in a liquid. Magnetized adsorbent particles can be dispersed, sprayed, or mixed into the filter material. For example, the magnetized adsorbent particles can be mixed with a liquid (eg, deionized water) to form a slurry. The slurry can then be dispersed in the filter material used to form the filter rod. In yet another example, the filter material (eg, cellulose acetate material or paper filter) can be washed away or dip coated with a slurry containing magnetized adsorbent particles.

  Magnetized adsorbent particles can be added to the cigarette filter material supplied to the filter maker or incorporated directly into the filter rod prior to wrapping the cigarette wrap around the rod to form the filter element. Preferably, the magnetized adsorbent particles are provided at different positions along the length of the filter rod, but the magnetized adsorbent particles can be provided continuously along the length of the filter element. Therefore, the magnetized adsorbent particles can be uniformly or non-uniformly distributed along the length direction of the filter rod. For example, the filter element includes a first filler of magnetized adsorbent particles at one location along the filter rod and a second filler of magnetized adsorbent particles at a second location along the filter rod. Can do. A preferred filter rod comprising magnetized adsorbent particles has a first filler of magnetized adsorbent particles at the lip side end of the filter rod, and a second filler of magnetized adsorbent particles on the tobacco side of the filter rod. And having less first filler than second filler.

Magnetized adsorbent particles can be incorporated into paper or other substrate material that is fitted within the passage of the filter element. Magnetized adsorbent particles can also be incorporated into a liner or plug inside the filter element. Alternatively, the magnetized adsorbent particles can be incorporated into the fibrous wall portion of the filter element.
As an example, the magnetized adsorbent particles can be incorporated in or on a paper-like support (eg, liner, plug, or tip paper) disposed along the filter portion of the cigarette. Magnetized adsorbent particles can also be loaded into a support such as lightly or tightly folded paper inserted into the hollow portion of a cigarette filter. The support is preferably in the form of a sheet material such as crepe paper, filter paper, or tip paper. However, other suitable support materials such as organic or inorganic cigarette compatible materials can also be used.

  Magnetized adsorbent particles can be incorporated into cigarette paper (eg, wrapping paper and / or paper filler) before or after the cigarette paper is incorporated into the cigarette. Magnetized adsorbent particles can be incorporated into the cellulose web of paper by depositing the magnetized adsorbent particles directly on the cellulose web or web filler material incorporated into the paper. Magnetized adsorbent particles can be incorporated into cigarette paper and / or raw materials used to produce cigarette paper (eg, incorporated into a paper stock of a cigarette paper making machine).

  Magnetized adsorbent particles can be incorporated into cigarette paper and / or filter materials by spraying or otherwise coating the particles with a matrix. For example, magnetized adsorbent particles can be incorporated into cigarette paper by spray coating the magnetized adsorbent particles on a wet base (eg, cellulose) web, intermediate web, or finished web. In another method, a slurry of magnetized adsorbent particles (eg, a water soluble slurry) can be incorporated into the head box of a paper making machine and the magnetized adsorbent particles can be incorporated into cigarette paper during the paper making process. . Magnetized adsorbent particles in the form of a dry powder can be physically mixed with cigarette paper and / or filter material during the manufacturing process.

  Any conventional or modified cigarette filter can incorporate magnetized adsorbent particles. Magnetized adsorbent particles can be incorporated into the hollow portion of the cigarette filter. For example, some cigarette filters have a plug / space / plug configuration, where the plug includes a fibrous filter material (eg, polypropylene or cellulose acetate fiber) and the space is simply a gap between the two filter plugs. is there. The voids can be partially or fully filled with magnetized adsorbent particles. Magnetized adsorbent particles can be used in granular form or packed into a suitable support such as fibers or fine wires.

  The amount, location, and distribution of magnetized adsorbent particles within the cigarette is the airflow exhibited during smoking, such as to adjust the increase or maximization of adsorption of at least one gas phase component within the cigarette mainstream smoke during smoking. Can be selected as a function of characteristics. Although a typical filter element is to contain about 10 mg to about 200 mg of magnetized adsorbent particles, the required amount can also be determined by routine experimentation and / or adjusted accordingly. Can do. Magnetized adsorbent particles can selectively adsorb / filter specific components from cigarette mainstream smoke. Further, as disclosed below, the distribution of magnetized adsorbent particles can be selected such that the amount of carbon monoxide and / or nitric oxide in the mainstream smoke is reduced during cigarette smoke.

In addition to incorporating magnetized adsorbent particles into filter elements or cigarette paper, magnetized adsorbent particles can be incorporated into cut fillers used to form cigarettes.
In all such filter element configurations, the attraction resistance (RTD) of the filter element comprising magnetized adsorbent particles and at least one magnetic substrate is preferably about 130 mm water column when measured at an air velocity of about 1050 cc / min. (About 5 inches).

  The following examples are illustrative. In embodiments, the magnetized adsorbent particles and magnetic beads can be incorporated into the filter material of the filter element itself. This embodiment is shown in FIG. 1 and shows a cigarette 2 composed of a tobacco rod 4 and a filter element 6. The filter element 6 can include a tube or a plug made of a cellulose acetate fiber 8 in which magnetized adsorbent particles 9 and magnetic beads 10 are dispersed. Magnetized adsorbent granules and / or magnetic beads can be supported by cellulose acetate fibers. The tobacco rod 4 and the filter element 6 can be joined by a tip paper (not shown).

  In yet another embodiment, the magnetic beads can be incorporated into the filter element as a gas permeable bed. The magnetic substrate can be incorporated into one or more components of the filter element, for example, by incorporating it into the void space as a bed of packed particles. FIG. 2 shows a cigarette 2 composed of a tobacco rod 4 and a filter element 6. This configuration is similar to the configuration of FIG. 1 except that the magnetic beads 10 are incorporated into the filter element space 20. Preferably, the 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 the filter element 6 can be joined together by tip paper (not shown).

  The magnetic substrate can be formed (eg, crimped) around the outer surface of the filter rod before the filter rod is wrapped in plug wrap. Referring to FIG. 3, the cigarette 2 includes a tobacco rod 4 and a filter element 6. The filter element further comprises magnetized adsorbent particles 9 and at least one magnetic ring 30 arranged radially around the filter rod. The magnetic ring is preferably about 1 mm thick and can be of any suitable axial length that is shorter than the length of the filter rod. The tobacco rod 4 and the filter element 6 can be joined to each other by tip paper (not shown). Furthermore, the filter element 6 can include a filter overwrap (not shown). The magnetic ring 30 is preferably located at or near the distal end of the cigarette.

  Another exemplary embodiment of a cigarette is shown in FIGS. 4-5, where the cigarette 2 includes a tobacco rod 4 and a filter element 6. In FIG. 4, the filter element further includes a magnetized adsorbent particle 9 and a magnetic rod 40 disposed axially along the length of the filter element. In FIG. 5, the filter element further includes a magnetized adsorbent particle 9 and a magnetic rod 50 disposed axially along the length of the filter element. In FIG. 4, the magnetic rod is external to the filter rod 44, and the filter overwrap 46 wraps around both the filter rod and the magnetic rod.

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. In FIG. 5, the magnetic rod 50 is axially disposed within the filter rod such that the filter material substantially surrounds the magnetic rod.
Yet another exemplary embodiment of a cigarette including a magnetic mesh is shown in FIG. Cigarette 2 includes tobacco rod 4, magnetized adsorbent particles 9 incorporated in the filter rod, and magnetic mesh 60 on the outside of the filter rod. The filter overwrap preferably wraps around both the filter rod and the magnetic mesh.

  Magnetized adsorbent particles and / or magnetic substrates can affect the oral sensory characteristics (eg, aroma and / or flavor) of mainstream smoke. Both the magnetized adsorbent particles and the magnetic substrate can change the chemical composition of the mainstream gas flowing through the filter element. For example, magnetized adsorbent particles can adsorb one or more gas phase components. Thus, magnetized adsorbent particles can be mainstream smoke of one or more gaseous components such as, for example, 1,3 butadiene, acrolein, isoprene, propionaldehyde, acrylonitrile, benzene, toluene, styrene, acetaldehyde, and hydrogen cyanide. Medium content can be reduced. Preferably, however, the magnetized adsorbent particles do not substantially reduce the mainstream smoke concentration of the smoke flavor element.

As described above, the magnetized adsorbent particles include magnetic particles incorporated within the adsorbent particles. Magnetic particles that are elemental metals (eg, iron) or oxide compounds (eg, iron oxide) can affect the concentration of one or more gas phase components of mainstream smoke. For example, magnetic particles, including nanoscale particles, can catalyze the conversion of one or more gas phase components during cigarette smoking. The catalyst used here can affect the chemical reaction rate without intervention as a reactant or reaction product.
Preferably, magnetic particles capable of acting both as an oxidant and as a catalyst for the conversion of carbon monoxide to carbon dioxide and / or nitric oxide to nitrogen (eg low temperature or near room temperature temperature catalysts) are being smoked. In addition, the amount of carbon monoxide and / or carbon dioxide in the mainstream smoke of cigarettes can be reduced.

The amount of magnetized adsorbent particles can be selected such that the amount of carbon monoxide and / or nitric oxide in the mainstream smoke is reduced during cigarette smoke. Preferably, the amount of magnetized adsorbent particles catalyzes and / or oxidizes to carbon dioxide, for example, at least 10%, more preferably at least 25% of carbon monoxide in mainstream smoke. A catalytically effective amount, such as a sufficient amount. The catalytically effective amount of magnetized adsorbent particles catalyzes and / or reduces to at least 10%, more preferably at least 25%, of the nitric oxide in the mainstream smoke. Can do.
The filter element can include a mixture of different magnetized adsorbent particles. Magnetized adsorbent particle composition (ie, stoichiometry and / or size of catalyst particles and / or stoichiometry and / or size of adsorbent particles) adsorbs mainstream smoke components in a given temperature range And can be selected to catalyze and / or reduce.

  Yet another embodiment provides a method for treating cigarette mainstream smoke including a filter element. Cigarette “smoking” refers to the heating or burning of a cigarette to form smoke that is drawn through the cigarette. In general, cigarette smoking involves igniting one end of the cigarette, while the tobacco contained therein undergoes a combustion reaction and sucks the smoke through combustion through the labial end of the filter element. . Cigarettes can also be smoked by other means. For example, cigarettes are described in commonly assigned US Pat. Nos. 6,053,176, 5,934,289, 5,591,368, or 5,322,075. As such, cigarettes can be smoked by heating and / or using electrical heating means.

  A method of manufacturing a filter element comprising a filter material, magnetized adsorbent particles, and at least one magnetic substrate includes (i) providing a filter material and a plug wrap material, and (ii) forming the filter material on a filter rod. (Iii) incorporating magnetized adsorbent particles and at least one magnetic substrate into and / or on at least one of the filter rod and plug wrap material; and (iv) wrapping the filter rod in the plug wrap material and the filter element Forming a step.

Although preferred embodiments have been described, it should be understood that variations and modifications may be relied upon, as will be apparent to those skilled in the art. Such variations and modifications are to be considered within the scope of the claims appended hereto.
All of the above cited references are hereby incorporated by reference to the same extent as if each individual reference was specifically and individually indicated to be incorporated herein by reference in its entirety. The content is incorporated by reference.

1 is a perspective view of a cigarette including magnetized adsorbent particles and magnetic beads incorporated throughout the filter material of a cigarette filter element. FIG. FIG. 5 is a perspective view of a cigarette including magnetized adsorbent particles and magnetic beads incorporated into a filter element as a gas permeable bed. It is a perspective view of a cigarette containing magnetized adsorbent particles and a magnetic ring formed around the cigarette filter rod. 1 is a perspective view of a cigarette including magnetized adsorbent particles and a magnetic rod incorporated along the surface of a cigarette filter rod. FIG. It is a perspective view of a cigarette containing a magnetized adsorbent particle and a magnetic rod incorporated in the axial direction in the filter rod of the cigarette. 1 is a perspective view of a cigarette including magnetized adsorbent particles and a magnetic mesh incorporated along the outer surface of a cigarette filter rod. FIG.

Explanation of symbols

2 Cigarette with Filter 6 Filter Element 8 Filter Material 9 Magnetized Adsorbent Particle 10 Magnetic Base

Claims (8)

  1. A filter element designed to be incorporated into a cigarette with a filter,
    Filter material;
    Magnetized adsorbent particles,
    At least one magnetic substrate;
    A filter element characterized by containing.
  2.   The filter element according to claim 1, wherein the magnetized adsorbent includes magnetic material particles incorporated into the adsorbent material particles.
  3.   The filter element according to claim 1, wherein the magnetized adsorbent includes iron particles and / or iron oxides incorporated into activated carbon particles.
  4.   The filter element of claim 1, wherein the particles of the magnetized adsorbent are incorporated throughout the filter material.
  5.   The at least one magnetic substrate is one or more filter portions selected from the group consisting of a paper insert, a plug, a space between plugs, a cigarette filter paper, a cellulose acetate sleeve, a polypropylene sleeve, and a free-flow sleeve. The filter element according to claim 1, wherein the filter element is incorporated into the filter element.
  6.   A cigarette comprising the filter element according to claim 1.
  7. A tobacco rod attached to the filter element using tip paper,
    At least one magnetic substrate is incorporated axially between the filter element and the tobacco rod;
    The cigarette according to claim 6.
  8. A method of manufacturing a cigarette filter element comprising a filter material, magnetized adsorbent particles, and at least one magnetic substrate comprising:
    Providing a filter material and a plug packaging material;
    Forming the filter material into a filter rod;
    Incorporating the magnetized adsorbent particles and the at least one magnetic substrate into and / or on at least one of the filter rod and the plug wrap material;
    Wrapping the filter rod in the plug wrap material to form a filter element;
    A method comprising the steps of:
JP2009502259A 2006-03-31 2007-04-02 Smoking articles including magnetic filter elements Pending JP2009531057A (en)

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US78750606P true 2006-03-31 2006-03-31
PCT/IB2007/002237 WO2007132356A2 (en) 2006-03-31 2007-04-02 Smoking articles comprising magnetic filter elements

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EP (1) EP2003996B1 (en)
JP (1) JP2009531057A (en)
KR (1) KR20090008237A (en)
AT (1) AT478573T (en)
BR (1) BRPI0709696A2 (en)
DE (1) DE602007008705D1 (en)
EA (1) EA012564B1 (en)
UA (1) UA92214C2 (en)
WO (1) WO2007132356A2 (en)

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EA012564B1 (en) 2009-10-30
US20070235046A1 (en) 2007-10-11
WO2007132356A3 (en) 2008-03-20
KR20090008237A (en) 2009-01-21
UA92214C2 (en) 2010-10-11
WO2007132356A2 (en) 2007-11-22
EP2003996A2 (en) 2008-12-24
DE602007008705D1 (en) 2010-10-07
AT478573T (en) 2010-09-15
BRPI0709696A2 (en) 2011-07-19
EP2003996B1 (en) 2010-08-25

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