EP3720306A1 - Filtre de fumée de tabac - Google Patents

Filtre de fumée de tabac

Info

Publication number
EP3720306A1
EP3720306A1 EP18819033.4A EP18819033A EP3720306A1 EP 3720306 A1 EP3720306 A1 EP 3720306A1 EP 18819033 A EP18819033 A EP 18819033A EP 3720306 A1 EP3720306 A1 EP 3720306A1
Authority
EP
European Patent Office
Prior art keywords
filter
filter element
longitudinally extending
wrapper
additive release
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.)
Pending
Application number
EP18819033.4A
Other languages
German (de)
English (en)
Inventor
Patrick MEREDITH
Sudirman WIDIARTO
Paul Morris
Robert WHIFFEN
Harismal NATANEGARA
Michael GREGG
Arief RAHMAN
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.)
Essentra Filter Products Development Co Pte Ltd
Original Assignee
Essentra Filter Products Development Co Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Essentra Filter Products Development Co Pte Ltd filed Critical Essentra Filter Products Development Co Pte Ltd
Publication of EP3720306A1 publication Critical patent/EP3720306A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • 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
    • A24D1/00—Cigars; Cigarettes
    • A24D1/02—Cigars; Cigarettes with special covers
    • 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
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A24D3/0216—Applying additives to filter materials the additive being in the form of capsules, beads or the like
    • 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
    • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
    • 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
    • A24D3/061—Use of materials for tobacco smoke filters containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking

Definitions

  • the present invention relates to tobacco smoke filters, especially for cigarettes.
  • Combined Performance Superior (CPS) tobacco smoke filters are well known. These comprise a filtering core and two wrappers, an inner wrapper and an outer wrapper.
  • the inner wrapper is subjected to an embossing process whereby it is grooved or corrugated over part of its length. This results in the production of channels.
  • Each filter will include a length of grooved inner wrapper (“flutes”) and non-grooved inner wrapper (“bars”).
  • flutes grooved inner wrapper
  • bars non-grooved inner wrapper
  • These filters have the advantage of providing enhanced filtration efficiency and allowing for use of lower pressure drop to achieve the same filtration efficiency.
  • the embossed inner wrapper may provide a distinctive end appearance which can be used as an anti- counterfeiting measure.
  • Tobacco smoke filters which contain an additive release vessel, e.g. a frangible capsule, are also well known.
  • the additive may be a flavouring agent.
  • the smoker applies pressure to the filter to break the capsule thereby resulting in the release of the flavouring agent.
  • a capsule or capsules into a CPS filter is highly desirable, providing enhanced filtration performance while also allowing for flavour delivery on demand to the user.
  • Current methods of combination of a CPS filter with a capsule would require the separate production of a CPS filter element and a capsule containing filter element; these would be joined to produce a dual segment filter (e.g. with a common outer wrapper).
  • Such a filter lacks a single unitary core of tobacco smoke filtering material. This method does not allow for provision of a capsule in register with the flute portion of the CPS filter.
  • Multi-segment filters such as dual segment filters are formed from two of more segments of filtering material.
  • Single segment filters are formed from a single unitary section of filtering material.
  • Multi-segment filters e.g. dual segment filters
  • a tobacco smoke filter or filter element comprising a longitudinally extending (e.g. substantially cylindrical) core of tobacco smoke filtering material, a first (e.g. at least partially corrugated e.g. air permeable) wrapper around the core, and a second wrapper around the first wrapper, the first wrapper defining at least with (e.g. between itself and) the second wrapper at least one (e.g.
  • peripheral channel extending longitudinally of the filter orfilter element, wherein the (or each) longitudinally extending channel extends less than the full length of the filter or filter element such that a longitudinally extending portion of the filter orfilter element is free of longitudinally extending channels; the filter orfilter element further comprising at least one additive release vessel (e.g. a capsule e.g. a frangible capsule).
  • additive release vessel e.g. a capsule e.g. a frangible capsule
  • the longitudinally extending (e.g. substantially cylindrical) core of tobacco smoke filtering material is a single unitary core of tobacco smoke filtering material.
  • the core is formed from one section of filtering material, rather than separate sections e.g. abutted against each other.
  • the applicants have found that a filter or filter element that comprises a single unitary core of tobacco smoke filtering material may be produced more efficiently via a single pass production process.
  • an additive release vessel can be positioned in register with the region of the filter or filter element that is free of channels, which may provide enhanced flavour release (or enhanced smoking sensation) to the smoker.
  • the filter or filter element of the present invention may be incorporated into a multi-segment filter as a single segment. This would allow for an increase in the number of features that could be incorporated into the multi-segment filter.
  • a filter element of the present invention may be joined with a filter element containing a particulate additive e.g. activated carbon granules, allowing for enhanced filtration and on demand flavour delivery to the user.
  • Current methods known in the art involve spraying the flavourant (e.g. menthol) onto tobacco smoke filtering material that includes carbon. This does not allow for on demand release of the flavourant combined with the enhanced filtration properties of carbon.
  • the first wrapper defines at least with (e.g. between itself and) the second wrapper at least one (e.g. peripheral) channel extending longitudinally of the filter or filter element, wherein the (or each) longitudinally extending channel extends less than the full length of the filter or filter element such that a longitudinally extending portion of the filter or filter element is free of longitudinally extending channels.
  • there may be 5 or more longitudinally extending channels for example 5 to 25 longitudinally extending channels, for example 9 to 20 longitudinally extending channels.
  • a filter or filter element of around 20-25 mm circumference may include, for example, 14 to 20 longitudinally extending channels.
  • a filter or filter element of around 16-17 mm circumference may include, for example, 9 to 14 longitudinally extending channels.
  • the first wrapper is a paper wrapper.
  • the first wrapper is an air permeable wrapper.
  • the first wrapper may be, for example, air permeable filtering paper (e.g. corrugated air permeable filtering paper) or a wrapper of cellulose acetate (e.g. corrugated air permeable cellulose acetate).
  • the weight of the inner wrapper may be from 50 grams per square meter to 100 grams per square meter, e.g. 80 grams per square meter.
  • the first (e.g. air permeable) wrapper has longitudinally extending corrugations which define the longitudinally extending channels at least with (e.g. between itself and) the second wrapper.
  • the first wrapper may be (e.g. at least partially) corrugated, the corrugations providing (defining) [e.g. together with the second wrapper] 5 or more longitudinally extending channels, for example 5 to 25 longitudinally extending channels, for example 9 to 20 longitudinally extending channels.
  • a filter or filter element of around 20-25 mm circumference may include, for example, 14 to 20 longitudinally extending channels (provided by the corrugations).
  • a filter or filter element of around 15-17 mm circumference may include, for example, 9 to 14 longitudinally extending channels (provided by the corrugations).
  • corrugated includes the meaning shaped into folds including parallel and alternating ridges and grooves. This incorporation of channels into the filter or filter element allows for improved filtration performance (e.g. improved tar retention) compared to conventional mono acetate filters with the same pressure drop.
  • the filter or filter element of the present invention may have a circumference from 10 mm to 30 mm, for example superslim filters or filter elements of 16 mm.
  • the (or each) portion of the filter which includes longitudinally extending channels (e.g. around the periphery of the filter) (e.g. which includes corrugations) is referred to herein as a flute or fluted portion.
  • the (or each) part or portion of the filter which does not include longitudinally extending channels (e.g. around the periphery of the filter) is referred to herein as a bar or bar portion.
  • the filter or filter element comprises at least one channel extending longitudinally from a first end of the filter or filter element, wherein the second end of the filter or filter element is free from longitudinally extending channels.
  • This example may include a flute portion at one end of the filter and a bar portion at the other end of the filter. This configuration may give a more desirable end appearance. Positioning of a flute portion at an end visible to the user allows for visual differentiation between products, for example visual differentiation between products comprising no additive release vessel and products comprising one additive release vessel.
  • the corrugated first wrapper may be coloured (e.g. green) providing further visual differentiation.
  • the first wrapper may include a pigment.
  • the first wrapper includes a pigment that provides a colour that substantially contrasts to the colour of the tobacco smoke filtering material and/or the second wrapper.
  • the colour of the wrapper may be used to identify the flavour provided by the additive release vessel.
  • the use of a coloured first wrapper may also be used as an anti-counterfeiting measure.
  • the filter or filter element comprises at least one channel extending longitudinally from the upstream end of the filter or filter element, and at least one channel extending longitudinally from the downstream end of the filter or filter element, and a central portion of the filter or filter element that is free of longitudinally extending channels.
  • This example may include a flute portion at each end and a single central bar portion.
  • the filter or filter element comprises at least one channel extending longitudinally of the filter or filter element and which extends only part of the filter or filter element length, located in the central portion of the filter or filter element such that the (or a) longitudinally extending channel does not extend from either the upstream or downstream ends of the filter or filter element.
  • This example may include a bar portion at each end and a single central flute portion. This will provide the enhanced filtration performance associated with the presence of longitudinally channels but will not affect end appearance.
  • each longitudinally extending channel is 2mm or greater, preferably between 2.5mm and 23mm, more preferably between 3mm and 15mm, more preferably between 3.5mm and 9mm. If the filter has flutes at either end the longitudinally extending channel or channels extending from one end (upstream or downstream) may be a different length to those extending from the other end, or they may be the same length.
  • the longitudinally extending channels at both ends of the filter may be between 7 and 8mm long.
  • the filter or filter element includes only one additive release vessel (that is, the filter or filter element preferably includes a single additive release vessel, rather than two or more additive release vessels).
  • the filter or filter element may include two or more additive release vessels.
  • the filter or filter element comprises at least one additive release vessel in register with the (or a) longitudinally extending portion of the filter or filter element that is free of longitudinally extending channels.
  • the filter or filter element includes only one additive release vessel (that is, the filter or filter element preferably includes a single additive release vessel, rthare than two or more additive release vessels).
  • the filter or filter element includes only one additive release vessel, wherein the additive release vessel is in register with the (or a) longitudinally extending portion of the filter or filter element that is free of longitudinally extending channels.
  • This example may include a filter or filter element comprising a flute portion at one end and a bar portion at the other wherein there is an additive release vessel in register with the bar portion.
  • positioning of an additive release vessel in register with the bar portion supplies a greater yield of flavourant to the user compared to positioning of the additive release vessel in register with the flute portion.
  • Positioning of the additive release vessel in the bar portion may be used to provide the user with a higher amount of flavourant.
  • the tobacco smoke filtering material may contain an additive, for example a flavourant. This may provide the user with an initial yield of flavourant.
  • An additive release vessel may be used to increase the yield of flavourant, allowing the user to vary the smoking experience e.g. provide a boost of flavour during smoking.
  • a second additive release vessel may be used to further increase the yield of flavourant, again allowing the user the vary the smoking experience, e.g. provide a further boost of flavour.
  • flavourants used in the filtering material and additive release vessel(s) may all be the same flavour, or they may be different flavours (e.g. complimentary flavours).
  • a tobacco smoke filter or filter element comprising a longitudinally extending (e.g. substantially cylindrical) core of tobacco smoke filtering material, a first (e.g. at least partially corrugates e.g. air permeable) wrapper around the core, and a second wrapper around the first wrapper, the first wrapper defining at least with (e.g. between itself and) the second wrapper at least one (e.g.
  • peripheral channel extending longitudinally of the filter or filter element, wherein the (or each) longitudinally extending channel extends less than the full length of the filter or filter element such that a longitudinally extending portion of the filter or filter element is free of longitudinally extending channels; the filter or filter element further comprising only one (single) additive release vessel, wherein the (single) additive release vessel is in register with the longitudinally extending portion of the filter or filter element that is free of longitudinally extending channels, wherein the additive release vessel is a capsule and contains an additive in the form of a flavourant.
  • This example may include a filter or filter element comprising a flute portion at one end and a bar portion at the other wherein there is an additive release vessel in register with the bar portion (see e.g.
  • the filter or filter element comprises at least one additive release vessel in register with the (or a) longitudinally extending portion of the filter or filter element that comprises longitudinally extending channels.
  • the filter or filter element includes only one additive release vessel.
  • the filter or filter element includes only one additive release vessel, wherein the additive release vessel is in register with the (or a) longitudinally extending portion of the filter or filter element that comprises longitudinally extending channels.
  • This example may include a filter or filter element comprising a flute portion at one end and a bar portion at the other wherein there is an additive release vessel in register with the flute portion.
  • the filter or filter element comprises at least one additive release vessel in registerwith a portion of the filter orfilter element wherein the (or a) longitudinally extending portion of the filter or filter element that comprises longitudinally extending channels meets the (or a) longitudinally extending portion of the filter or filter element that is free from longitudinally extending channels.
  • the filter or filter element includes only one additive release vessel.
  • the filter or filter element includes only one additive release vessel, wherein the additive release vessel is in register with a portion of the filter or filter element wherein the (or a) longitudinally extending portion of the filter or filter element that comprises longitudinally extending channels meets the (or a) longitudinally extending portion of the filter or filter element that is free from longitudinally extending channels.
  • This example may include a filter or filter element comprising a flute portion at one end and a bar portion at the other wherein there is an additive release vessel in registerwith the point where the flute portion and bar portion meet.
  • the filter or filter element comprises two additive release vessels. If there are two additive release vessel, one additive release vessel may be in register with the (or a) longitudinally extending portion of the filter or filter element that is free from longitudinally extending channels and one additive release vessel may be in register with the (or a) longitudinally extending portion of the filter or filter element that comprises longitudinally extending channels.
  • the applicants have found that by including two additive release vessels in the filter the user is able to vary the amount of flavourant they receive and increase the amount of flavourant they received compared to a single additive release vessel. For example, the user may break one additive release vessel at the beginning of smoking and one additive release vessel during smoking, allowing the user to vary the smoking experience e.g. provide a boost of flavour during smoking.
  • the filter orfilter element comprises two or more additive release vessels.
  • the additive release vessels may contain the same flavourant, or different flavourants.
  • the positioning of the additive release vessels in the filter or filter element can be used to provide the user with an optimal combination of flavours.
  • the increased yield of flavourant associated with positioning an additive release vessel in register with a bar portion of the filter or filter element can be used to provide an optimal balance of flavour with an additive release vessel in register with the flute portion.
  • each additive release vessel e.g. a capsule e.g. a frangible capsule
  • the (or each) additive release vessel is fully enclosed within the longitudinally extending (e.g. substantially cylindrical) core of tobacco smoke filtering material.
  • the additive release vessel e.g. a capsule
  • the longitudinally extending core of tobacco smoke filtering material has a uniform appearance.
  • the additive release vessel is a capsule, for example a frangible capsule.
  • the additive release vessel e.g. capsule e.g. frangible capsule
  • the additive release vessel includes an additive in the form of a flavourant.
  • the additive release vessel e.g. a capsule e.g. a frangible capsule
  • the tobacco smoke filtering material may contain one or more additives, for example a flavourant and/or a liquid, solid or other material, such as activated carbon, e.g. to aid smoke filtration.
  • the additive release vessel and/or tobacco smoke filtering material may further contain stimulants, water, tobacco extracts, smoke altering chemicals and/or agents to promote degradation of the filter.
  • the use of additive containing capsules in filters is well known in the art.
  • the flavourant may be any flavourant known or suitable for use in a smoking article such as a cigarette, for example menthol, spearmint, peppermint, fenugreek, clove etc.
  • the flavouring agent is or comprises menthol.
  • the additive release vessel (capsule) may comprise more than one flavouring agent (and may provide blends of different flavours, which may or may not include menthol).
  • the filter or filter element may include additive in the form of flavourant [e.g. in the additive release vessel [(e.g. frangible) capsule]], wherein the amount of additive (e.g. including a flavourant) is less than 35mg (per filter/filter element).
  • the filter or filter element may include additive in the form of flavourant [e.g. in the additive release vessel [(e.g. frangible) capsule]], wherein the amount of additive (e.g.
  • the additive release vessel [(e.g. frangible) capsule] may be of width (when measured at its broadest point in a direction across the filter, that is perpendicular to the direction in which the longitudinally extending core extends) 2 to 5mm, e.g. 2.5 to 4mm, e.g. 2.5 to 3.9mm, e.g. 3.0 to 3.8mm, e.g. 3.2 to 3.7 mm, e.g. 3.35 or 3.5 mm.
  • the additive release vessel [(e.g. frangible) capsule] may include less than 35mg flavourant.
  • the additive release vessel (e.g. frangible) capsule] may include from 5 to 30 mg, for example 7 to 25 mg, for example 10 to 25 mg, for example 10 to 20mg flavourant.
  • the filter or filter element may be of length 10 to 30 mm, e.g. 14 to 27 mm, e.g. 17 to 25 mm.
  • the longitudinally extending (e.g. substantially cylindrical) core comprises tobacco smoke filtering material.
  • the tobacco smoke filtering material may be, for example, any of those materials (usually filamentary, fibrous, web or extruded) which are conventionally employed for tobacco smoke filter manufacture.
  • the tobacco smoke filtering material may be, for example, natural or synthetic filamentary tow, e.g.
  • the filtering material is cellulose acetate tow (e.g. in the form of a cellulose acetate filamentary tow, for example 3.0 Y 30,000 tow).
  • the filtering material may be cellulose acetate to which a plasticiser has been applied (e.g. plasticised filamentary tow).
  • a plasticiser e.g. plasticised filamentary tow.
  • Triacetin is, as is well known in the art, and typically applied to cellulose acetate filters as a plasticiser (e.g. at around 6-8% w/w).
  • the invention includes (e.g. double and higher) length filter rods (and/or filter element rods), including a plurality of filter rods (filter element rods), e.g. joined end to end.
  • a method of tobacco smoke filter or filter element production (e.g. a method of production of tobacco smoke filters or filter elements as defined in the attached claims) wherein a train of tobacco smoke filtering material is continuously advanced longitudinally, the advancing filtering material is gathered towards rod shape, and the gathered advancing filtering material is shaped to and secured in rod form to provide a continuous rod (of a plurality of filters or filter elements);
  • additive release vessels e.g. a capsule e.g. a frangible capsule
  • additive release vessels e.g. a capsule e.g. a frangible capsule
  • a first inner wrapper and a second outer wrapper are applied around the gathered advancing filtering material as it is shaped to and secured in rod form (e.g. as or after the additive release vessels are inserted into the gathered advancing filtering material);
  • the inner wrapper including profiled (e.g. corrugated) portions spaced longitudinally between flat portions, the profiled (e.g. corrugated) portions of the first wrapper defining, with the second wrapper, channels extending longitudinally of the rod, such that the continuous rod (of a plurality of filters or filter elements) includes portions which include longitudinally extending channels separated by portions which do not include longitudinally extending channels.
  • the application of the first inner wrapper and the second outer wrapper around the gathered advancing filtering material shapes the gathered advancing filtering material and secures it in rod form.
  • the continuous rod may be cut to form single filters of filter elements or multiple product rods each comprising a plurality of filters or filter elements.
  • the continuous rod may be cut in register with a profiled portion of the first wrapper (in which case the cut end will expose the longitudinally extending channels) or in register with a flat portion of the first wrapper (in which case the cut end will not expose the longitudinally extending channels).
  • the additive release vessels may be inserted into the gathered advancing filtering material as it is shaped to and secured in rod form so they are in register with either a profiled (e.g. corrugated) portion of the first wrapper or a flat portion of the first wrapper (or both), or in register with a junction between a profiled (e.g. corrugated) portion of the first wrapper or a flat portion of the first wrapper.
  • the method can be used to provide filters or filter elements which include additive release vessels in register with flute portions, bar portions, both flute and bar portions, or in register with the junctions between flute and bar portions (see Example 3).
  • the additive release vessels e.g.
  • a capsule e.g. a frangible capsule
  • a capsule e.g. a frangible capsule
  • the invention provides a method of making a tobacco smoke filter which comprises providing an air-permeable axially extending core, forming around the core a first wrapper of air- permeable material and enwrapping a second wrapper around the wrapped core, the first wrapper defining at least with the second wrapper at least one channel extending longitudinally of the filter, wherein the (or each) longitudinal extending channel extends less than the full length of the filter such that a longitudinally extending portion of the filter is free of longitudinally extending channels, wherein the filter is formed as a continuous rod of a plurality of filters, and wherein the step (or steps) of cutting the continuous rod to form individual filters is arranged so the cut ends form the upstream end of the filter and the downstream end of the filter.
  • Additive release vessels e.g. a capsule e.g. a frangible capsule
  • the filters or filter elements produced comprise a unitary core of tobacco filtering material.
  • the longitudinally extending channels of filters/elements of the invention e.g. produced by the claimed methods
  • a filter or filter element of around 20-25 mm circumference may include longitudinally extending channels (provided by the corrugations) having area 5.5 to 7.5 mm 2 , for example 6.5 mm 2 .
  • a filter or filter element of around 15-17 mm circumference may include longitudinally extending channels (provided by the corrugations) having area 4.5 to 6.5 mm 2 , for example 5 mm 2 .
  • the method of production of the present invention allows for use of standard cellulose acetate tow items. It will be appreciated that other materials that are well known in the art may be used to form the tobacco smoke filter material, first wrapper, second wrapper and additive release vessel.
  • the filter will always be cut at both ends in a fluted region.
  • the bar length will not be affected by variation in cutting, and the performance (e.g. the pressure drop) of the final filter will be more consistent.
  • a smoking article e.g. cigarette
  • a tobacco smoke filter or filter element according to the invention comprising a tobacco smoke filter or filter element according to the invention.
  • the filter or filter element of the present invention is suitable for use with all varieties of tobacco blends.
  • a filter of the invention (or a filter which includes a filter element of the invention) is joined to a wrapped tobacco rod with one end of the filter towards the tobacco.
  • the filter may be joined to the wrapped tobacco rod by ring tipping [which engages around just the adjacent ends of the (wrapped) filter and rod to leave much of the filter wrap exposed].
  • the filter may be joined by a full tipping overwrap (which engages around the full filter length and the adjacent end of the tobacco rod).
  • FIGURE 1 shows a perspective view, not to scale, with parts broken away, of a filter according to one example of the invention
  • FIGURE 2 shows a perspective view, not to scale, with parts broken away, of a filter according to a further example of the invention
  • FIGURE 3 shows a schematic cross-sectional view of the filter illustrated in Figure 1 when cut along its longitudinal axis.
  • FIGURE 4 shows schematic cross-sectional views of three examples of the present invention where the capsule position and/or number of capsules has been varied.
  • a filter 1 comprises a longitudinally extending cylindrical core 2 of tobacco smoke filtering material in the form of cellulose acetate tow (filament denier of 3.0, total denier of 30,000).
  • a first wrapper 3 of air-permeable filter paper (basis weight 80 gsm) which has been embossed to provide corrugations along part of its length.
  • a second wrapper 4 of non-corrugated air-permeable filter paper (27 gsm basis weight) is wrapped around the first wrapper 3.
  • the first wrapper 3 is embossed to provide corrugations over approximately half of its length such that it is corrugated towards one end 1 a of the filter 1 and smooth at a second end 1 b of the filter 1 .
  • the corrugated part of the first wrapper 3 towards end 1 a defines, between itself and the non-corrugated second wrapper 4, twenty four channels 5a that extend longitudinally of the filter around the periphery of the core (i.e. peripheral channels).
  • the tobacco filtering core 2 surface conforms to the corrugations in the first wrapper 3.
  • the corrugated first wrapper 3 is corrugated over only part of its length such that the longitudinally extending channels 5a extend less than the full length of the filter so that a longitudinally extending portion 6 of the filter 1 is free of longitudinally extending channels.
  • the filter also contains a frangible capsule 9 which includes a menthol flavouring agent. Capsule 9 is fully enclosed within the core 2 of the tobacco smoke filtering material and is not visible, although the approximate position in register with portion 6 of the filter (without channels) is shown by a dotted circle.
  • the portion of the filter 7 that includes longitudinally extending channels 5a around the periphery of the filter may be referred to as a flute or fluted portion.
  • the portion 6 of the filter that does not include longitudinally extending channels around the periphery of the filter may be referred to as a bar or bar portion.
  • Figure 3 illustrates a schematic cross-sectional view of Figure 1 when cut along the filter’s longitudinal axis. It can be seen that capsule 9 is in register with the portion of the filter 6 which does not include longitudinally extending peripheral channels 5a.
  • the filter 1 may be joined to a wrapped tobacco rod to form a cigarette, by methods well known in the art.
  • the filter may, for example, be joined to the wrapped tobacco rod by ring tipping [which engages around just the adjacent ends of the (wrapped) filter and rod to leave much of the filter wrap exposed].
  • the filter may, for example, be joined by a full tipping overwrap (which engages around the full filter length and the adjacent end of the tobacco rod). If the bar portion of the filter 1 is joined to the tobacco rod, the flute portion of the filter will be visible at the mouth end of the cigarette. This can be used as an anti-counterfeiting measure.
  • the first wrapper 3 may be coloured (i.e. may include a pigment).
  • the first wrapper 3 may be coloured green so as to contrast with the colour of the tobacco smoke filtering material (which is generally white). This colour further differentiates the filter for anti-counterfeiting purposes and may serve to identify the flavour. If the flute portion of filter 1 is joined to the tobacco rod, the bar portion of filter 1 will be positioned at the mouth end of the cigarette. This provides the usual cigarette appearance but with the enhanced filtration properties that are associated with the channels present.
  • a filter 101 comprises a longitudinally extending cylindrical core 102 of tobacco smoke filtering material in the form of cellulose acetate tow (filament denier of 3.0, total denier of 30,000).
  • a first wrapper 103 of air-permeable filter paper (basis weight 80 gsm) which has been embossed to provide corrugations along part of its length.
  • a second wrapper 104 of non-corrugated air-permeable filter paper (27 gsm basis weight) is wrapped around the first wrapper 103.
  • the first wrapper 103 is embossed to provide corrugations over approximately half of its length such that it is corrugated towards one end 101 a of the filter 101 and smooth at a second end 101 b of the filter 101.
  • the corrugated part of the first wrapper 103 towards end 101 a defines, between itself and the non-corrugated second wrapper 104, twenty four channels 105a that extend longitudinally of the filter around the periphery of the core (i.e. peripheral channels).
  • the tobacco filtering core 102 surface conforms to the corrugations in the first wrapper 103.
  • the corrugated first wrapper 103 is corrugated over only part of its length such that the longitudinally extending channels 105a extend less than the full length of the filter so that a longitudinally extending portion 106 of the filter 101 is free of longitudinally extending channels (and a longitudinally extending portion 107 of the filter includes longitudinally extending channels 105a).
  • the filter also contains a frangible capsule 109 which includes a menthol flavouring agent. Capsule 109 is fully enclosed within the core 102 of the tobacco smoke filtering material and is not visible, although the approximate position in register with portion 107 of the filter (which includes longitudinally extending channels 105a) is shown by a dotted circle.
  • the portion of the filter 107 that includes longitudinally extending channels 105a around the periphery of the filter may be referred to as a flute or fluted portion.
  • the portion 106 of the filter that does not include longitudinally extending channels around the periphery of the filter may be referred to as a bar or bar portion.
  • the filter 101 may be joined to a wrapped tobacco rod to form a cigarette, by methods well known in the art.
  • the filter may, for example, be joined to the wrapped tobacco rod by ring tipping [which engages around just the adjacent ends of the (wrapped) filter and rod to leave much of the filter wrap exposed].
  • the filter may, for example, be joined by a full tipping overwrap (which engages around the full filter length and the adjacent end of the tobacco rod). If the bar portion of the filter 101 is joined to the tobacco rod, the flute portion of the filter will be visible at the mouth end of the cigarette. This can be used as an anti-counterfeiting measure.
  • the first wrapper 103 may be coloured (i.e. may include a pigment).
  • the first wrapper 103 may be coloured green so as to contrast with the colour of the tobacco smoke filtering material (which is generally white). This colour further differentiates the filter for anti-counterfeiting purposes and may serve to identify the flavour. If the flute portion of filter 101 is joined to the tobacco rod, the bar portion of filter 101 will be positioned at the mouth end of the cigarette. This provides the usual cigarette appearance but with the enhanced filtration properties that are associated with the channels present.
  • the filter or filter element according to the present invention may be produced in the following manner.
  • the methods and machinery are well known in the art.
  • the filter is produced using a modified mono acetate filter machine (known in the art).
  • the machine requires a CPS kit and a Capsule Inserter kit that are known in the art.
  • the filters are produced via the production of a multiple length rod.
  • the machine tow processing is set to form a longitudinally extending unitary rod of cellulose acetate tow.
  • the machine is then set to feed in air-permeable filter paper and perform embossing on the air-permeable filter paper resulting in the registration of the flute (embossed, corrugated) portions and the bar portions on the filters.
  • the capsule inserter kit is then set to insert capsules into the cellulose acetate tow at defined positions.
  • Capsule Inserter kit capsules may be inserted at the bar portion, flute portion or at the join of a bar and flute portion.
  • a filter containing two capsules may also be produced.
  • the step (or steps) of cutting the continuous rod to form individual filters is arranged so the cut ends form the upstream end of the filter and the downstream end of the filter.
  • the method allows for the features of the filter to be customisable to requirement, e.g. the capsule position, flute orientation and colour of the plug wrap can all be varied with ease.
  • Filter A is a filter according to Figure 1 and was tested without crushing the single capsule.
  • Filter B is a filter according to Figure 1 comprising a single capsule in register with the bar portion that was crushed to release the menthol additive prior to testing. A cross-sectional view of filter B is shown in Figure 4.
  • Filter C is a filter according to Figure 3 comprising a single capsule in register with the flute portion that was crushed prior to testing.
  • a cross-sectional view of filter C has been shown in Figure 4.
  • Filter D comprised a single capsule in register with the bar portion and a single capsule in register with the flute portion. Both capsules were crushed prior to testing.
  • a cross-sectional view of filter D has been shown in Figure 4.
  • the menthol retention data for each filter was measured by methods well known in the art. The measurements were repeated four times for each filter embodiment. The results have been illustrated in Tables 1 to 4. The pad measurement data indicates the yield of menthol in the smoke. The average menthol smoke yield for the filters has been summarised in the Tables 1 to 4. Table 1
  • menthol yield in the smoke is higher when the crushed capsule is positioned in register with the bar portion. Without wanting to be bound by theory, it is thought that the flutes allow by-passing of the smoke to the mouth end and thus less menthol is retained in the cellulose acetate filter material. The applicants have further found that crushing one capsule in the bar portion and one capsule in the flute portion (Filter D) does not equal the yield that would be obtained by adding together the menthol yield data for filters B and C. The variety of menthol smoke yields obtained indicates that the flavour yield may be varied depending on the capsule position in the present invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

L'invention concerne un filtre ou un élément de filtre de fumée de tabac, comprenant un noyau, s'étendant longitudinalement, de matière de filtration de fumée de tabac, une première enveloppe autour du noyau, et une seconde enveloppe autour de la première enveloppe, la première enveloppe délimitant au moins avec la seconde enveloppe au moins un canal, s'étendant longitudinalement, du filtre ou de l'élément de filtre. Ledit canal s'étendant longitudinalement s'étend sur une longueur inférieure à la longueur totale du filtre ou de l'élément de filtre de sorte qu'une partie, s'étendant longitudinalement, du filtre ou de l'élément de filtre est exempte de canaux s'étendant longitudinalement. Le filtre ou l'élément de filtre comprend en outre au moins un récipient pour la libération d'additif.
EP18819033.4A 2017-12-08 2018-12-06 Filtre de fumée de tabac Pending EP3720306A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1720490.0A GB201720490D0 (en) 2017-12-08 2017-12-08 Tobacco smoke filter
PCT/EP2018/083750 WO2019110715A1 (fr) 2017-12-08 2018-12-06 Filtre de fumée de tabac

Publications (1)

Publication Number Publication Date
EP3720306A1 true EP3720306A1 (fr) 2020-10-14

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EP18819033.4A Pending EP3720306A1 (fr) 2017-12-08 2018-12-06 Filtre de fumée de tabac

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EP (1) EP3720306A1 (fr)
JP (1) JP2021505166A (fr)
KR (1) KR20200096280A (fr)
CN (1) CN111432667A (fr)
GB (1) GB201720490D0 (fr)
TW (1) TW201924548A (fr)
WO (1) WO2019110715A1 (fr)

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Publication number Priority date Publication date Assignee Title
US20220400742A1 (en) * 2019-10-28 2022-12-22 Jt International Sa Filter Component for an Aerosol-Generating Article
CN113876029A (zh) * 2021-09-30 2022-01-04 山东中烟工业有限责任公司 连续改变卷烟烟气运动方向和状态的滤嘴棒的加工方法
CN114983017B (zh) * 2022-05-24 2023-08-22 云南中烟工业有限责任公司 一种内芯填充的外中空滤棒及其加工方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963179A (ja) * 1982-10-01 1984-04-10 三菱アセテート株式会社 タバコ用吸口
GB8424978D0 (en) * 1984-10-03 1984-11-07 British American Tobacco Co Smoking articles
JPH0711599Y2 (ja) * 1990-09-25 1995-03-22 ブラウン アンド ウイリアムソン タバコ コーポレーション シガレットフィルター
GB0610144D0 (en) * 2006-05-22 2006-06-28 Filtrona Int Ltd Tobacco smoke filter
GB0906187D0 (en) * 2009-04-09 2009-05-20 British American Tobacco Co Smoking article filter
JP2011072296A (ja) * 2009-10-02 2011-04-14 British American Tobacco Japan Kk 添加剤を含むフィルター
GB201016387D0 (en) * 2010-09-29 2010-11-10 Filtrona Int Ltd Tobacco smoke filter
GB2490728A (en) * 2011-05-13 2012-11-14 British American Tobacco Co Filter for a smoking article
PL222242B1 (pl) * 2012-01-18 2016-07-29 Int Tobacco Machinery Poland Spółka Z Ograniczoną Odpowiedzialnością Sposób i zespół do przekazywania kapsułek
CN102669817A (zh) * 2012-05-22 2012-09-19 南通烟滤嘴有限责任公司 预埋固体胶囊的滤嘴和滤棒
KR101748537B1 (ko) * 2013-08-21 2017-06-16 니뽄 다바코 산교 가부시키가이샤 담배용 필터
PL3171717T3 (pl) * 2014-07-22 2021-04-19 Jt International Sa Sposób i urządzenie do kształtowania pręta filtracyjnego
CN112998312B (zh) * 2015-08-03 2023-02-10 益升华过滤产品开发私人有限公司 烟草烟雾滤嘴
ITUB20156245A1 (it) * 2015-12-03 2017-06-03 Gd Spa Macchina per la realizzazione di filtri.

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RU2020120025A (ru) 2022-01-10
TW201924548A (zh) 2019-07-01
KR20200096280A (ko) 2020-08-11
CN111432667A (zh) 2020-07-17
RU2020120025A3 (fr) 2022-01-28
JP2021505166A (ja) 2021-02-18
WO2019110715A1 (fr) 2019-06-13
GB201720490D0 (en) 2018-01-24

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