WO2016075234A1 - Procédé de fabrication d'un article à fumer - Google Patents

Procédé de fabrication d'un article à fumer Download PDF

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Publication number
WO2016075234A1
WO2016075234A1 PCT/EP2015/076429 EP2015076429W WO2016075234A1 WO 2016075234 A1 WO2016075234 A1 WO 2016075234A1 EP 2015076429 W EP2015076429 W EP 2015076429W WO 2016075234 A1 WO2016075234 A1 WO 2016075234A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
holes
filter material
perforations
layer
Prior art date
Application number
PCT/EP2015/076429
Other languages
English (en)
Inventor
Peter UHRMEISTER
Original Assignee
Jt International S.A.
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 Jt International S.A. filed Critical Jt International S.A.
Publication of WO2016075234A1 publication Critical patent/WO2016075234A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • 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
    • A24D3/043—Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution

Definitions

  • the present invention relates to a method of manufacturing or making an aerosol generating product, such as a cigarette, a cigarillo, a cigar or the like, which for the sake of brevity and clarity will be generally referred to herein simply as a "smoking article".
  • an aerosol generating product such as a smoking article, which is obtained or manufactured by the inventive method.
  • smoking articles such as cigarettes, cigarillos, cigars and the like are configured to generate an aerosol in the form of smoke for use by a consumer.
  • a smoking article is also more generally referred to as an "aerosol generating product" in this disclosure.
  • an object of this invention is to provide a new and improved method of manufacturing an aerosol generating product, and especially a smoking article, for the tobacco processing industry.
  • a method of manufacturing or producing an aerosol generating product having featux-es as recited in claim 1 is provided.
  • the invention provides a method of manufacturing an aerosol generating product, and especially a smoking article, the method comprising:
  • an elongate element of aerosol generating material especially a rod element of smoking material, such as tobacco
  • the invention provides a new and improved method or technique for forming or introducing holes or perforations in the filter element or filter "plug" of a smoking article.
  • the perforations or holes formed in the element or plug of filter material provide ventilation enabling air to be drawn laterally into the filter element and, thus, into a main flow or mainstream of the aerosol (e.g. smoke) that originates, in use, from the element of aerosol generating material (e.g. a rod element of tobacco) .
  • the additional lateral airflow mixes with the main axial flow of aerosol/smoke through the filter and causes more turbulence than laminar flow.
  • the airflow generated by the perforations or holes can produce a higher interaction or pick-up rate of flavour in the filter element by the mainstream smoke.
  • the holes or perforations may also provide 5 a capillary effect to distribute a flavouring liquid or an indicator liquid faster, thereby providing a faster or more efficient and homogeneous release of taste components to the mainstream aerosol/smoke .
  • the step of forming perforations or holes in the elongate element of filter material is carried out during fabrication5 or production of that filter element.
  • the elongate element of the filter material is a rod element or plug element comprising filter material, such as cellulose acetate tow or fibres, which is wrapped or enclosed by at least one layer of a sheet material, known as "plug wrap".
  • This sheet material may be porous (e.g. paper) or non-porous (e.g. a plastic film or coated paper) .
  • the step of forming perforations or holes in the rod element of filter material then preferably comprises forming the perforations or holes in the at least one layer of sheet material, i.e. in the plug wrap, such that they communicate with the axial or mainstream flow of aerosol/ smoke through the filter material within or enclosed by the plug wrap.
  • the individual filter rod elements or plug elements are produced by fabricating a continuous or long filter rod and then cutting that rod into a plurality of shorter elements, each typically of uniform length.
  • the fabrication of the continuous or long filter rod prior to cutting therefore pi-eferably includes the step of forming a plurality of perforations or holes in the at. least one layer of sheet material or plug wrap which is wrapped around and/or encloses the filter material, e.g. cellulose acetate tow or fibres, of the continuous or long filter rod.
  • the step of forming the perforations or holes in the elongate element of filter material may comprise forming the perforations or holes in a filter rod member which comprises a plurality of filter elements.
  • the individual plug elements or rod elements of filter material may then be subsequently cut from the filter rod member.
  • the step of forming perforations or holes comprises forming those perforations or holes in the layer of sheet material that covers or wraps the elongate filter member.
  • the perforations or holes are preferably not only formed through the layer of sheet material, but also into or through the filter material covered or wrapped by the at least one layer of sheet material. This not only ensures a good flow path for lateral airflow into the mainstream flow of smoke through the filter material, it also enhances the capillary effect for better distributing a flavouring liquid or an indicator liquid through the filter material.
  • the assembling step comprises: arranging an end of the elongate element of filter material (e.g. rod element or plug element) adjacent and/or abutting an end of the elongate element of aerosol generating material (e.g. tobacco rod element), and joining or fastening those elements together via at least one layer of sheet material or wrapper that covers or wraps the said elements at least in a region of their abutting ends.
  • This at least one layer of sheet material or wrapper that joins or fastens the said elements together in the assembling step typically comprises paper, known as "tipping paper", although other materials may be contemplated.
  • the filter element is perforated before assembly with the tobacco rod to form the smoking article, it becomes possible to employ pre-perforated tipping paper with few holes or perforations which are barely visible or apparent to a consumer without a close inspection. This way, it becomes possible to eliminate a step of forming perforations or holes simultaneously through both the tipping paper and the plug wrap from the method of manufacturing the smoking article.
  • tar, nicotine, and carbon monoxide (TNCO) levels with perfor-ated tipping paper and plug wrap can be difficult.
  • porosity change of tipping paper requires a long lead-time, which can generate write-off costs with old tipping paper stock.
  • a change in the plug wrap or the pressure drop of the filter over time can also impact on cost, with inventory options for the plug wrap limited as well.
  • the method of the invention addresses these issues with the potential to vary the number of perforations or holes and their respective depths to imitate variation in porosity of the plug wrap at constant cost. In this way, the ventilation of the filter element or plug can be varied with constant tipping paper porosity over a sufficient range for maintenance of the TNCO levels, thereby reducing the tipping paper inventories and write-offs.
  • the perforations or holes are formed and/or arranged randomly in the elongate element of filter material.
  • the perforations or holes may be formed or arranged evenly or in an ordered arrangement in the element of filter material.
  • the perforations or holes are distributed and/or 5 formed around a periphery or circumference of the element of filter material.
  • the perforations or holes may be formed and/or distributed along a longitudinal extent of the elongate element of filter material.
  • the step of forming perforations or holes in the element of filter material includes moving the element of filter material relative to a perforating device or hole forming device; e.g.
  • the perforating device or the hole forming device preferably comprises at least one laser beam from a laser source, and more preferably multiple laser beams.
  • the perforations or holes may be formed by means of at least one laser beam, which penetrates and preferably perforates the at least one0 layer of plug wrap for communication with the mainstream flow through the filter material.
  • round or cylindrical holes can be created having a minimum or predetermined small diameter and a controllable depth.
  • the at least one laser beam is typically movable with respect to the5 element of filter material; for example, movable along a longitudinal direction and/or in a transverse direction with respect to the elongate element of filter material. By virtue of this relative movement, it becomes possible to generate different patterns for the perforations or holes formed in the filter element.
  • the perforating device or hole forming device may include a beam splitter arrangement for generating multiple laser beams from a single laser source (e.g. a continuous or a pulsed laser source) .
  • the beam splitter arrangement may include a prism and/or one or more mirrors and preferably comprises a number of optical fibres to convey and direct individual laser beams towards the filter element from the laser source.
  • Optical fibres are highly flexible and relatively inexpensive, and are therefore practical for transmitting multiple laser beams.
  • the ends of the optical fibres can be arranged in a predetermined array or pattern for transmitting the laser beams onto the element of filter material.
  • the optical fibres for the multiple laser beams are therefore preferably directed towards and arranged around and/or along a length or extent of the filter element for simultaneously forming a plurality of spaced perforations or holes in the filter element; e.g. according to a pattern or predetermined arrangement .
  • the beam splitter arrangement includes an optical fibre support configured to receive and hold a free end of each of the optical fibres in such a way that the laser beam from each individual optical fibre is directed towards the longitudinal axis of the filter element.
  • the optical fibre support may be configured to hold the optical fibres such that the laser beams are emitted therefrom in a plane generally perpendicular to a length or longitudinal axis of the element of filter material. This perpendicular orientation of the laser beams to the filter element thus forms straight cylindrical holes.
  • the optical fibre support may be configured to hold the optical fibres in such a way that the laser beams are emitted from the optical fibres to define a generatrix of at least one conical surface having its vertex on the longitudinal axis of the elongate filter element. This angled or oblique orientation of the laser beams to the filter element thus forms inclined holes.
  • the method may further comprise 5 the step of : forming perforations or holes in the at least one layer of sheet material or wrapper that joins or fastens the elements together in the assembling step before or after the assembling step. That is, the layer of sheet material or wrapper (e.g. tipping paper) is optionally also perforated.0 To this end, a perforating device or hole forming device that corresponds to the one employed for forming the perforations or holes in the filter element could be used. Alternatively, the at least one layer of sheet material or wrapper (tipping paper) that joins or fastens the elements together may be5 pre-perforated.
  • the layer of sheet material or wrapper e.g. tipping paper
  • the present invention provides an aerosol generating product, especially a smoking article, manufactured or obtained by a method according to any one of the embodiments described above.
  • Fig. 1 is a schematic perspective view of a construction of a smoking article (e.g. cigarette) obtained by a method according to a preferred embodiment
  • Fig. 2 is a schematic perspective view of a smoking article (e.g. cigarette) manufactured by a method according to a preferred embodiment ,-
  • Fig. 3 is a schematic side view of a production system for making a filter rod for use in manufacturing a smoking article
  • Fig. 4 is a schematic side view of a filter rod produced for use in a method according to an embodiment of the invention.
  • Fig. 5 is a schematic side view of another filter rod for use in a method according to an embodiment of the invention.
  • Fig. 6 is a flow diagram that schematically represents a method of an embodiment of the invention.
  • the smoking article 1 comprises an elongate, generally cylindrical rod element 2 of an aerosol generating material 3, especially a smoking material, such as tobacco, which is covered or wrapped with a layer 4 of sheet material in the form of cigaz-ette paper.
  • the layer or sheet 4 of cigarette paper is typically fixed around the body or mass of tobacco 3 via at least one fine line 5 of adhesive or glue applied in an overlap region 6 of the cigarette paper.
  • the smoking article 1 comprises an elongate, generally cylindrical rod element or plug element 7 of a filter material 8, such as cellulose acetate tow, which is covered or wrapped with a layer 9 of sheet material commonly referred to as plug wrap.
  • a filter material 8 such as cellulose acetate tow
  • plug wrap a layer 9 of sheet material commonly referred to as plug wrap.
  • the layer or sheet 9 of plug wrap is typically fixed around the body of filter material 8 via adhesive or glue 10 applied in an overlap region 11 of the plug wrap 9.
  • the sheet 9 of plug wrap may be selected to be non-porous to prevent uncontrolled transport or seepage of the liquid there- through.
  • the rod element 2 of tobacco 3 and the plug element 7 of filter material 8 are arranged substantially in alignment such that an end 12 of the tobacco rod element 2 is adjacent to and/or0 in abutment with an end 13 of the filter plug element 7.
  • One or more layer 14 of a paper sheet or wrapper, commonly known as tipping paper is then used to join or fasten the tobacco x'od element 2 and the filter plug element 7 together.
  • the layer 14 of tipping paper covers or wraps those5 elements 2, 7 in a region of their abutting ends 12, 13 and is fixed to each of the tobacco rod element 2 and the filter plug element 7 via a fine line 15 of adhesive or glue applied along an edge region 16 of the layer 14.
  • the layer or sheet 14 of tipping paper typically fully covers the filter plug element 7, as seen in Fig. 1.
  • both the plug of filter material 8 and the layer 9 of sheet material or plug wrap around the filter material 8 of the filter plug element 7 have an ordered array of perforations or holes 17 formed therein before the tobacco rod element 2 and the filter plug element 7 are assembled and joined together with the layer or sheet 14 of tipping paper.
  • the layer 9 of plug wrap can be seen to include the perforations or holes 17 before the layer 9 is wrapped around the cylindrical body of filter material 8, this view simply illustrates the construction of the filter element 7 and need not necessarily be the case.
  • the perforations or holes 17 may also be formed in the layer 9 of plug wrap after that layer 9 has been wrapped and fixed around the body of filter material 8 during fabrication of the plug element 7. 5 As seen in Fig. 1, the perforations or holes 17 are formed or arranged in rows which extend around a circumference of the filter plug element 7 in a central region thereof.
  • the layer 9 of plug wrap in the filter plug element 70 is already perforated with holes 17 when that filter element 7 is combined and assembled with the tobacco rod element 2, it is possible to use a pre-perforated layer 14 of tipping paper when joining or fastening those two elements 2, 7 of the cigarette 1.
  • the pre-perforated layer 14 of tipping paper will usually have a relatively small number of perforations or holes 18 so that these are not visible or apparent to a consumer without very close inspection. These perforations or holes 18 in the layer 14 of tipping paper are nevertheless sufficient to allow a lateral influx of air into the filter plug element 7 through the perforations or holes 17 in the layer 9 of plug wrap.
  • the layer 14 of tipping paper effectively hides or obscures the holes or perforations 17 in the layer 9 of plug wrap and only a single fine row or line of perforations or holes 18 is visible on close inspection by a consumer.
  • an axial flow or mainstream flow 19 of an aerosol or smoke S from the tobacco 3 is drawn longitudinally of and within the smoking article 1 and through the filter element 7 (i.e. in a direction of the arrow) .
  • an air-flow is also drawn laterally through the perforations or holes 17, 18 and this lateral air ⁇ flow mixes with the mainstream flow 19 to create turbulence and a more convoluted flow path through the filter element 7.
  • the step of forming the perforations or holes 17 in the filter element 7, and particularly in the plug of filter material 8 and the layer 9 of sheet material or plug wrap around the filter0 material 8, may be performed during fabrication of the filter element 7.
  • the discrete or individual filter rod elements 7 are cut from continuous or long filter rod members 20 (e.g. as illustrated schematically in the drawing Figs. 4 and 5) which are typically fabricated or produced in a dedicated filter making apparatus or machine 30 as shown schematically in Fig. 3 of the drawings for manufacture of standard crimped cellulose acetate filters commonly used in the tobacco industry.
  • the step of perforating holes in the filter plug element 7, and especially in the layer 9 of plug wrap could likewise be implemented in filter rod elements 7 produced with randomly oriented fibres of cellulose acetate, such as obtained from TURMALIN filter maker from the German manufacturer HAUNI .
  • the filter material 8 comprising cellulose acetate tow
  • the filter tow 8 is drawn in a generally continuous strand or ribbon from a supply 8' (e.g. bale) and then conveyed through a series of banding jets 31, 31', 31", pre- tension rollers 32, and a blooming roller 33.
  • the filter tow 8 is stretched and relaxed to create a maximum surface area in the fibres of the cellulose acetate.
  • the generally continuous strand or ribbon D of filter tow 8 passes through a plasticiser addition unit 34, in which a plasticiser such as a triacetin is added to the fibres (e.g. by spraying) to enhance their adhesion together.
  • a plasticiser such as a triacetin
  • the filter tow 8 passes through delivery rollers 35 into a third, rod-making stage C of the filter making procedure.
  • the strand D of filter tow fibres 8 is channelled via a guide device 36, especially a trumpet guide having a so-called "stuffer jet”0 or transport jet 36', to form or provide the tow fibre strand D with the desired circular cross-sectional shape.
  • a capsule, pellet or thread of flavouring material may also be introduced into the strand D of filter tow material 8.
  • a sheet or layer 9 of plug wrap material is drawn from a bulk roll 37 and fed via roller's up to the tow fibre strand 8.
  • An adhesive is typically applied to the layer 9 of plug wrap material via an applicator nozzle 38 as that layer 9 of plug wrap material is brought into contact with and wrapped around the strand of filter material 8.
  • This adhesive which usually bonds or fixes the plug wrap 9 to the filter material 8 may be applied to the plug wrap material 9 as a single line or as multiple lines of adhesive, and may follow either straight or non-linear- application patterns (circular, wavy or curly, for example) .
  • a seam line 10 of glue is preferably applied to an overlap region 11 of the plug wrap 9 at an outlet of the guide device 36.
  • seam lines may be deposited at the same time as the attachment glue at nozzle 38.
  • the continuous filter rod R that is thereby formed comprising the strand D of filter material 8 now covered with the layer 9 of plug wrap then passes through a sealing chamber 39 to seal and bond the wrapped rod in its final desired shape.
  • the 5 sheet or layer 9 of plug wrap material wrapped around the filter tow 8 assists in maintaining a desired cylindrical form of the filter rod.
  • the continuous rod of filter material is inspected at an inspection station 41 and then conveyed to a0 cutting station 42 where it is cut into predetermined lengths of rod members 20, e.g. as shown in Figs.
  • the perforating or hole forming device 40 comprises a laser source for generating a laser beam, and a beam splitter for splitting the single laser beam from the laser into multiple laser beams.
  • the beam splitter of the perforating device 40 includes a plurality of optical fibres, each of which is0 configured and arranged to convey and direct individual laser beams towards the filter rod members 20.
  • the optical fibres are mounted within a support that holds a free end of each of the optical fibres arranged in a row or array directed at and arranged around and/or along an extent of the rod members 20.
  • the multiple laser beams emitted from the ends of the individual optical fibres are directed towards a longitudinal axis of the filter rod member 20 and can simultaneously cut or burn a plurality of perforations or holes 17 (e.g. preferably evenly spaced) through the layer 9 of plug wrap aroxind the rod members 20.
  • a plurality of perforations or holes 17 e.g. preferably evenly spaced
  • the laser settings such as power and operation time
  • parameters e.g. depth
  • the perforations or holes 17 not only penetrate the layer (s) 9 of plug wrap around the filter material 8, but also penetrate through the fibres of the filter tow 8 towards the middle of the rod members 20.
  • the optical fibre support may be movable with respect to the filter rod members 20 to generate the desired constellation of perforations or holes 17, and/or more preferably the filter rod members 20 may be movable with respect to the support; e.g. in the longitudinal direction and/or in rotation about their longitudinal axes .
  • the perforations or holes 17 formed in the filter rod members 20 may be arranged in a regular or ordered, densely packed array around a circumference of the filter rod member 20 and along a length thereof.
  • the perforations or holes 17 formed in the filter rod members 20 may be arranged in a series of single circumferential rows 21 evenly spaced apart along the filter rod member 20 such that each filter element 7 to be cut from the filter rod member 20 has a single circumferential row 21 of the perforations or holes 17.
  • each filter element 7 may include multiple rows 21 of the perforations or holes 17, e.g. circumferentially, in a particular region thereof.
  • the perforations or holes 17, which are formed in the layer or sheet 9 of plug wrap around the tow material 8 and extend into the filter plug elements 7, can act as capillaries or pathways to assist transportation of flavouring liquids from capsules along and through the filter elements 7. They can thus assist the activation of indicators and faster distribution in the filter element 7 for release to the axial or mainstream smoke 19.
  • lateral air-flow through the perforations or holes 17 causes a more turbulent flow of smoke through the filter element 7 which facilitates pick-up of more flavour molecules into mainstream smoke 19.
  • Forming the perforations or holes 17 in the plug wrap layer 9 is also 5 able to flexibly mimic porous plug wrap material with the number and extent of perforation effectively varying porosity for pre-perforated tipping paper products.
  • the rod members 20 may again be inspected at an inspection station 41 and then conveyed via a conveyor device 43 either to a storage buffer 44 or to another cutting station where the rod members 20 are cut to individual filter elements 7, which are then stored in a storage buffer.
  • the first 0 box I represents the step of providing an elongate element 2 of an aerosol generating material or smoking material 3, such as tobacco, as shown in Fig. 1.
  • the second box II represents the step of providing an elongate filter element 7 of filter material 8, such as cellulose acetate tow, wrapped in a layer5 or sheet 9 of plug wrap.
  • the sixth box IV represents the step of forming perforations or holes 17 in the element 7 of filter material 8 before the assembling step.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un produit (1) générateur d'aérosol, notamment un article à fumer, le procédé comprenant les étapes consistant à : fournir un élément allongé (2) d'un matériau (3) générateur d'aérosol, notamment un élément tige de matériau à fumer, tel que du tabac ; fournir un élément allongé (7) de matériau filtrant (8) ; assembler l'élément allongé (2) de matériau (3) générateur d'aérosol avec l'élément allongé (7) de matériau filtrant (8) afin de former ou de produire le produit (1) générateur d'aérosol ; le procédé comprenant la formation de perforations ou de trous (17) dans l'élément (7) de matériau filtrant (8) avant l'étape d'assemblage.
PCT/EP2015/076429 2014-11-12 2015-11-12 Procédé de fabrication d'un article à fumer WO2016075234A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14192856 2014-11-12
EP14192856.4 2014-11-12

Publications (1)

Publication Number Publication Date
WO2016075234A1 true WO2016075234A1 (fr) 2016-05-19

Family

ID=51900221

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/076429 WO2016075234A1 (fr) 2014-11-12 2015-11-12 Procédé de fabrication d'un article à fumer

Country Status (1)

Country Link
WO (1) WO2016075234A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045680A (en) * 1958-09-30 1962-07-24 Millard F Smith Smoke filtering device
GB1105100A (en) * 1966-01-10 1968-03-06 Lorillard Co P Cigarette tip and method of making it
FR2414884A1 (fr) * 1978-01-24 1979-08-17 Seita Perfectionnement aux filtres pour cigarettes
WO2000000047A1 (fr) * 1998-06-30 2000-01-06 Philip Morris Products, Inc. Cigarette et filtre presentant un niveau eleve de ventilation
EP1072201A2 (fr) * 1999-07-29 2001-01-31 Filtrona International Limited Filtre pour cigarette et cigarette à filtre

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045680A (en) * 1958-09-30 1962-07-24 Millard F Smith Smoke filtering device
GB1105100A (en) * 1966-01-10 1968-03-06 Lorillard Co P Cigarette tip and method of making it
FR2414884A1 (fr) * 1978-01-24 1979-08-17 Seita Perfectionnement aux filtres pour cigarettes
WO2000000047A1 (fr) * 1998-06-30 2000-01-06 Philip Morris Products, Inc. Cigarette et filtre presentant un niveau eleve de ventilation
EP1072201A2 (fr) * 1999-07-29 2001-01-31 Filtrona International Limited Filtre pour cigarette et cigarette à filtre

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