EP3880010B1 - Tobacco smoke filter - Google Patents
Tobacco smoke filter Download PDFInfo
- Publication number
- EP3880010B1 EP3880010B1 EP20816155.4A EP20816155A EP3880010B1 EP 3880010 B1 EP3880010 B1 EP 3880010B1 EP 20816155 A EP20816155 A EP 20816155A EP 3880010 B1 EP3880010 B1 EP 3880010B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tobacco smoke
- filter
- cavity
- filtering material
- filter element
- 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.)
- Active
Links
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims description 120
- 239000000779 smoke Substances 0.000 title claims description 115
- 244000061176 Nicotiana tabacum Species 0.000 title description 3
- 241000208125 Nicotiana Species 0.000 claims description 117
- 239000000463 material Substances 0.000 claims description 75
- 239000002775 capsule Substances 0.000 claims description 73
- 238000001914 filtration Methods 0.000 claims description 70
- 239000000654 additive Substances 0.000 claims description 41
- 230000000996 additive effect Effects 0.000 claims description 39
- 239000000853 adhesive Substances 0.000 claims description 32
- 230000001070 adhesive effect Effects 0.000 claims description 32
- 239000000796 flavoring agent Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 19
- 230000000391 smoking effect Effects 0.000 claims description 14
- 229920002301 cellulose acetate Polymers 0.000 claims description 11
- 235000019504 cigarettes Nutrition 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000011800 void material Substances 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- NOOLISFMXDJSKH-KXUCPTDWSA-N (-)-Menthol Chemical compound CC(C)[C@@H]1CC[C@@H](C)C[C@H]1O NOOLISFMXDJSKH-KXUCPTDWSA-N 0.000 description 16
- NOOLISFMXDJSKH-UHFFFAOYSA-N DL-menthol Natural products CC(C)C1CCC(C)CC1O NOOLISFMXDJSKH-UHFFFAOYSA-N 0.000 description 14
- 229940041616 menthol Drugs 0.000 description 14
- 235000019634 flavors Nutrition 0.000 description 8
- 235000013355 food flavoring agent Nutrition 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000004873 anchoring Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000001953 sensory effect Effects 0.000 description 3
- 244000024873 Mentha crispa Species 0.000 description 2
- 235000014749 Mentha crispa Nutrition 0.000 description 2
- 244000246386 Mentha pulegium Species 0.000 description 2
- 235000016257 Mentha pulegium Nutrition 0.000 description 2
- 235000004357 Mentha x piperita Nutrition 0.000 description 2
- 235000016639 Syzygium aromaticum Nutrition 0.000 description 2
- 244000223014 Syzygium aromaticum Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000001050 hortel pimenta Nutrition 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 235000019615 sensations Nutrition 0.000 description 2
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 244000144730 Amygdalus persica Species 0.000 description 1
- 244000223760 Cinnamomum zeylanicum Species 0.000 description 1
- 235000005979 Citrus limon Nutrition 0.000 description 1
- 244000131522 Citrus pyriformis Species 0.000 description 1
- 235000016623 Fragaria vesca Nutrition 0.000 description 1
- 240000009088 Fragaria x ananassa Species 0.000 description 1
- 235000011363 Fragaria x ananassa Nutrition 0.000 description 1
- 244000270834 Myristica fragrans Species 0.000 description 1
- 235000009421 Myristica fragrans Nutrition 0.000 description 1
- 235000006040 Prunus persica var persica Nutrition 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 244000299461 Theobroma cacao Species 0.000 description 1
- 244000250129 Trigonella foenum graecum Species 0.000 description 1
- 235000001484 Trigonella foenum graecum Nutrition 0.000 description 1
- 244000290333 Vanilla fragrans Species 0.000 description 1
- 235000009499 Vanilla fragrans Nutrition 0.000 description 1
- 235000012036 Vanilla tahitensis Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019219 chocolate Nutrition 0.000 description 1
- 235000017803 cinnamon Nutrition 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 235000013773 glyceryl triacetate Nutrition 0.000 description 1
- 239000001087 glyceryl triacetate Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000001702 nutmeg Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004834 spray adhesive Substances 0.000 description 1
- 239000000021 stimulant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229960002622 triacetin Drugs 0.000 description 1
- 235000001019 trigonella foenum-graecum Nutrition 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- A24D3/02—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
- A24D3/06—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
-
- 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
- A24D1/00—Cigars; Cigarettes
- A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
- A24D1/045—Cigars; Cigarettes with mouthpieces or filter-tips with smoke filter means
-
- 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
- A24D3/0225—Applying additives to filter materials with solid additives, e.g. incorporation of a granular product
-
- 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
- A24D3/0229—Filter rod forming processes
-
- 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
- A24D3/0275—Manufacture of tobacco smoke filters for filters with special features
- A24D3/0287—Manufacture of tobacco smoke filters for filters with special features for composite filters
-
- 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
- A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
- A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
- A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
- A24D3/163—Carbon
Definitions
- the present invention relates to tobacco smoke filters or filter elements for smoking articles such as cigarettes.
- Tobacco smoke filters which include a frangible capsule, or a plurality of frangible capsules, embedded in the tobacco smoke filtering material are well-known. These capsules contain an additive (typically a liquid flavouring agent). The smoker applies pressure to the filter to break the capsule therein to release the flavouring agent. The smoker would usually break the capsule immediately prior to smoking, although they may choose to break it at any stage of the smoking process (or not at all). Such capsule filter products are consequently known as 'flavour-on-demand', indicating that the smoker chooses when, and if, he requires the release of flavour contained within the capsule.
- an additive typically a liquid flavouring agent
- the smoker applies pressure to the filter to break the capsule therein to release the flavouring agent.
- the smoker would usually break the capsule immediately prior to smoking, although they may choose to break it at any stage of the smoking process (or not at all).
- Such capsule filter products are consequently known as 'flavour-on-demand', indicating that the smoker chooses when, and if,
- Tobacco smoke filters which contain a central cavity, surrounded by tobacco smoke filtering material, have been previously described by the applicant e.g. Cavitec ® filter.
- the central cavity is filled with one or more sepiolite granular additives (e.g. a flavourant) with high levels of additive loading.
- the cavity optimises the effect of the additive providing the user with a consistent flavour level and a cigarette that is always flavoured, including when the pack is first open.
- these filters the smoker does not have a choice when (if at all) to release the flavour and there is no extra interactive or sensory experience.
- EP2740370 and WO2016/016252 disclose tobacco smoke filters containing a capsule in a cavity.
- US2017/295842 discloses tobacco smoke filters containing flavourant particles in a cavity.
- a tobacco smoke filter or filter element comprising: a longitudinally extending core which includes first and second longitudinally extending rods of tobacco smoke filtering material, wherein the first rod of tobacco smoke filtering material is distanced longitudinally from the second rod of tobacco smoke filtering material; a wrapper engaged around the first and second longitudinally extending rods such that the wrapper defines a cavity between the first and second rods of tobacco smoke filtering material wherein the wrapper is opaque with an opacity of 71% or more measured according to ISO 2471:2008 (Paper and board - Determination of opacity (paper backing) - Diffuse reflectance method) and a weight of 23 grams per square meter to 100 grams per square meter; and at least one receptacle for an additive located in the cavity, wherein the maximum width or diameter of the receptacle for an additive is less than half the maximum diameter of the cavity and the void space remaining in the cavity is greater than 50% of the volume of the cavity, the receptacle being free to
- the phrase "being free to move within the cavity” means the receptacle is not fixed or adhered (e.g. with adhesive) within the cavity and has sufficient space to move in all directions (e.g. up, down, forward, back, left, right) in the cavity.
- the receptacle may move freely in any direction within the cavity.
- the movement of the receptacle is audible and palpable. It can be sensed (e.g. heard or felt as a vibration) by the user.
- audible means within the accepted human hearing range for pitch (Hz) and loudness (dB) i.e. 20 to 20,000 Hz and 0 to 85 dB.
- palpable means able to be touched or felt.
- tobacco smoke filter and filter elements of the invention may provide a unique and enhanced sensory experience for the smoker.
- These features provide the smoker with both aural and haptic sensations for an enhanced sensory experience when smoking.
- the movement of the capsule or capsules in all directions within the cavity generates vibrations, the frequencies of which can vary depending on the number, size and composition of capsules as well as the length and circumference of the cavity and the weight, opacity and composition of the wrapper engaged around the cavity.
- the vibrational frequencies provide the smoker with a new and different feel compared with a conventional filter.
- the vibrational frequencies of the freely moving capsules may be in particular use in combating anti-counterfeiting, a major problem in the cigarette industry.
- the vibrational frequencies and audible rattle created by the free movement of the capsule or capsules within the cavity are distinctive and could help to deter counterfeiting of the brand.
- the longitudinally extending core may be substantially cylindrical (including at least the first and second rods of tobacco smoke filtering material and the cavity therebetween).
- the core is formed from two spaced rods of tobacco smoke filtering material, rather than a single rod of tobacco smoke filtering material.
- the first rod of tobacco smoke filtering material is distanced longitudinally from the second rod of tobacco smoke filtering material leaving a space therebetween.
- the space between the first rod of tobacco smoke filtering material and the second rod of tobacco smoke filtering material is of length 3.5 mm to 32 mm e.g. 3.5 to 26 mm, e.g. 4 to 22 mm, e.g. 5 to 21 mm, e.g. 7 to 14 mm.
- the first rod of tobacco smoke filtering material and the second rod of tobacco smoke filtering material may be of the same length or of different length.
- the tobacco smoke filtering material of the first rod of tobacco smoke filtering material and the tobacco smoke filtering material of the second of rod tobacco smoke filtering material may be composed of the same or different filtering materials.
- the filtering materials are cellulose acetate (e.g. in the form of a crimped filamentary tow).
- cotton or plastics such as polyethylene or polypropylene, natural or synthetic staple fibres, cotton wool, a web material such as paper (usually creped), an (e.g. synthetic) non-woven material, and/or an extruded material (e.g. starch, synthetic foams, extruded foams) are also acceptable.
- the filtering materials may comprise carbon (e.g.
- 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 well known in the art and is typically applied to cellulose acetate filters as a plasticiser (e.g. at around 6-8% w/w).
- the tobacco smoke filter or filter element comprises one or more receptacles for an additive.
- the term "receptacle for an additive” refers to the, or each receptacle for an additive where there is more than one receptacle.
- the receptacle for an additive is a capsule (e.g. a frangible capsule).
- the receptacle for an additive e.g. capsule e.g. frangible capsule
- the receptacle for an additive includes an additive in the form of a flavourant.
- 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 receptacle for an additive may be coloured to identify the flavourant enclosed (e.g. a green capsule for menthol).
- the receptacle for an additive may comprise more than one flavouring agent (and may provide blends of different flavours).
- the receptacles may contain the same flavourant, or different flavourants.
- the user is able to vary the amount of flavourant they receive, and when they receive it, by breaking the required number of receptacles e.g. the user may break one receptacle for an additive at the beginning of smoking and one receptacle for an additive during smoking, allowing the user to vary the smoking experience e.g. provide a boost of flavour during smoking.
- the receptacle for an additive 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 receptacle for an additive 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 receptacle for an additive e.g. capsule e.g. frangible capsule
- the receptacle for an additive may include from 5 to 30 mg flavourant, e.g. 7 to 25 mg, e.g. 10 to 25 mg, e.g. 10 to 20 mg.
- the receptacle for an additive e.g. a capsule e.g. a frangible capsule
- the receptacle for an additive is freely moveable within the central cavity. This means that the receptacle for an additive is not fixed or adhered (e.g. with adhesive) to the filter wrapper or the first and second rods of tobacco smoke filtering material.
- the maximum width or diameter (if spherical or substantially spherical) of the receptacle is less than half the maximum diameter of the cavity.
- the volume of the receptacle e.g. the space the receptacle occupies
- the void space e.g. the space the receptacle does not occupy
- the receptacle for an additive is therefore free to move in all directions (e.g. longitudinally and latitudinally) within the void space in the cavity and in doing so creates an audible and palpable rattle when the filter is moved or shaken.
- the receptacle for an additive is not visible (to the smoker) at the mouth or buccal end of the filter or filter element, or at the mouth end of a cigarette including a filter of this aspect of the invention.
- the applicants have surprisingly found that positioning of a free moving capsule within the cavity supplies a greater yield of flavourant to the user compared to positioning of the capsule embedded (and immovably) within the tobacco smoke filtering material.
- the menthol yield in the smoke is higher when the crushed capsule is positioned within the cavity (and is free to move within the cavity) thus the smoker experiences increased flavour delivery.
- the wrapper is engaged around the longitudinally extending core and engaged around the first and second rods of tobacco smoke filtering material and defines a cavity between the first and second rods of tobacco smoke filtering material.
- the closest ends (e.g. the facing ends) of the first and second rods of tobacco smoke filtering material, together with the internal surface of the wrapper define the cavity.
- At least one receptacle for an additive is freely located in the cavity.
- the cavity is of length 3.5 mm to 32 mm e.g. 3.5 to 25 mm, e.g. 4 to 22 mm, e.g. 5 to 21 mm, e.g. 7 to 14 mm.
- the cavity may be of circumference from 14 to 28 mm, e.g.
- the cavity may have a maximum diameter from 5 mm to 10 mm, e.g. 5.3 mm to 7.8 mm. It will be appreciated that the circumference and diameter of the cavity will be substantially the same as the circumference and diameter of the filter or filter element.
- the cavity may vary in position within the longitudinally extending core, for example the cavity may be substantially central within the longitudinally extending core or positioned towards one end of the longitudinally extending core.
- Adhesive is applied to the wrapper in register with the plugs of tobacco smoke filtering material but not in register with the space between plugs.
- the region of the cavity is free of adhesive and only the first and second rods of tobacco smoke filtering material are adhered to the wrapper. This allows the capsule to move freely in the central cavity.
- the adhesive may be any conventional filter wrapper adhesive known in the art and may be applied by methods well known in the art.
- the wrapper may be coloured (e.g. green) providing further visual differentiation from conventional filters.
- the colour of the wrapper e.g. a green wrapper for menthol
- the wrapper may be a paper, e.g. plugwrap.
- the wrapper may be coated to minimise absorption of liquids released from the ruptured capsule, as is well-known in the art.
- the wrapper may be standard or porous depending on ventilation requirements.
- the wrapper may be air permeable filtering paper (e.g. corrugated air permeable filtering paper) or a wrapper of cellulose acetate (e.g. crimped air permeable cellulose acetate).
- the weight of the inner wrapper is from 23 grams per square meter to 100 grams per square meter, e.g. 80 grams per square meter.
- the wrapper may include a still further flavouring agent located thereon, which may be any flavouring agent known for use in tobacco smoke filters or filter elements (e.g.
- the flavouring agent may be menthol, spearmint, peppermint, nutmeg, cinnamon, clove, lemon, chocolate, peach, strawberry, vanilla etc.).
- the wrapper is opaque, with an opacity of 71% or more (e.g. 71% to 100%, e.g. 71% to 80%, e.g. 80% to 90%, e.g. 90% to 100%).
- opacity means a value measured according to ISO 2471:2008 Paper and board - Determination of opacity (paper backing) - Diffuse reflectance method).
- the weight and opacity of the wrapper may influence the vibrational frequencies generated by the movement of the capsule or capsules in all directions within the cavity. Further the weight and opacity of the wrapper may affect the aural and haptic sensations experienced by the user when the filter or filter element is moved or shaken.
- the tobacco smoke filter or filter element may be of length 10 to 45 mm, e.g. 15 to 35 mm e.g. 11 to 25 mm, e.g. 12 to 16 mm, , e.g. 20 to 30 mm.
- the filter or filter element may be of circumference from 14 to 28 mm, e.g. 16 to 26 mm, e.g. 16 to 25 mm, e.g. 16 to 19 mm, e.g. 24 to 25 mm.
- the filter or filter element may have a maximum diameter from 5 mm to 10 mm, e.g. 5.3 mm to 7.8 mm.
- the tobacco smoke filter or filter element may be used in smoking articles (e.g. a cigarette, e.g. a tobacco heat product) in a variety of different circumferences (e.g. microslim e.g. superslim, e.g. slim, e.g. standard, e.g. king size).
- the present invention provides a smoking article (e.g. cigarette, e.g. tobacco heat product) comprising a tobacco smoke filter or filter element according to the invention.
- the tobacco smoke filter or filter element of the present invention is suitable for use with all varieties of tobacco blends.
- a filter smoking article according to the invention 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).
- 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.
- the tobacco smoke filter or filter element may also be incorporated into a multi-segment filter as a single segment.
- the tobacco smoke filter or filter element of the present invention may be made by the following method.
- the method comprises the steps of:
- the method of production of a tobacco smoke filter or filter element of the present invention allows for use of standard cellulose acetate tow items for example NWA (non-wrapped acetate) filtering plugs. It will be appreciated that other materials that are well known in the art may be used to form the tobacco smoke filter material, wrapper and receptacle for an additive.
- NWA non-wrapped acetate
- the method of production of a tobacco smoke filter or filter element of the present invention requires a combiner machine and an additional capsule inserter kit (known in the art).
- the filters are produced via the production of a multiple length rod.
- the machine tow processing is set to arrange plugs of cellulose acetate tow on to a filter wrapper (garniture) longitudinally at intervals so as to leave spaces between plugs.
- a segment anchorage adhesive is applied to filter wrapper at equivalent intervals to the plugs so there is no adhesive in the spaces between plugs.
- the wrapper and plugs are brought together ensuring adhesive is in register with the plugs but not in register with the spaces between plugs.
- the capsule inserter kit is then set to insert capsules into the spaces between the plugs of cellulose acetate tow by means of a capsule drum.
- a filter containing two or more capsules may also be produced.
- the wrapper, with adhesive applied to the edge, is gathered and secured around the plugs to form a continuous rod of alternating wrapped plugs and cavities, such that no adhesive is present in the cavities.
- the adhered wrapper forms a continuous rod of alternating wrapped plugs and cavities with one or more receptacles for an additive enclosed in each cavity.
- An optional step of cutting the resulting continuous product rod to form individual filters or filter elements may then be executed.
- the continuous rod may be cut through each plug of tobacco smoke filtering material. Cutting may occur at any position through the plug of tobacco smoke filtering material to produce variations in size of the first and second plugs of tobacco smoke filtering material and cavity position within the longitudinally extending core. For example, cutting longitudinally through the centre of the plugs of tobacco smoke filtering material will create individual tobacco smoke filter or filter elements with first and second longitudinally extending rods of tobacco smoke filtering material of equal size surrounding a centrally located cavity. Cutting at other positions will create individual tobacco smoke filter or filter elements with first and second longitudinally extending rods of tobacco smoke filtering material of different size surrounding an off-centre cavity. The filter or filter element length will not be affected by variation in cutting, and the performance (e.g. the pressure drop) of the final filter will be consistent.
- Figure 1 and 2 show a tobacco smoke filter or filter element of 27 mm length and 24.5 mm circumference comprising a longitudinally extending cylindrical core 1 which includes first and second longitudinally extending rods of tobacco smoke filtering material 2 and 3 in the form of NWA (non-wrapped acetate) crimped tow.
- the first rod of tobacco smoke filtering material 2 is distanced longitudinally from the second rod of tobacco smoke filtering material 3.
- a wrapper 4 of transparent air-permeable plugwrap which is held in place with an adhesive stuck seam along portions of its length.
- the wrapper 4 defines a cavity 5 of length 5 mm and diameter 7.8 mm between the first and second rods of tobacco smoke filtering material 2 and 3.
- a segment anchoring adhesive is applied to wrapper 4 in register with the first and second rods of tobacco smoke filtering material 2 and 3 (to hold rods 2 and 3 in place) but is not applied in register with the spaces between plugs, as such that no segment anchoring adhesive is present within the cavity 5.
- a receptacle for additive in the form of a frangible capsule 6 of diameter 3.5 mm, which includes a menthol flavouring agent, is fully enclosed within the cavity 5.
- Frangible capsule 6 has a diameter of less than 50% of the diameter of cavity 5.
- the void space in cavity 5 e.g.
- the wrapper 4 serves as a window into cavity 5 which may be used to identify the flavourant in the capsule 6 (e.g. a green capsule for menthol) and establish whether or not the capsule 6 has been broken. This wrapper 4 further differentiates the filter for anti-counterfeiting purposes. In other examples the wrapper 4 may be opaque with an opacity of 71% or more (measured according to ISO 2471:2008 Paper and board - Determination of opacity (paper backing) - Diffuse reflectance method).
- 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).
- FIG 3 illustrates a birds-eye-view of a cross section of the method of production of a multiple length rod according to an example of the invention.
- the continuous rod of filters 7 comprises plugs of tobacco smoke filtering material 8, which are adhered to wrapper 9. No adhesive is present within the cavity 10 hence capsule 11 is able to move freely within the cavity.
- the continuous rod of filters 7 may be cut to create individual tobacco smoke filter or filter elements as in Figure 1 and 2 . It will be appreciated that cutting may occur at a range of positions through the plugs of tobacco smoke filtering material to create individual tobacco smoke filter or filter elements.
- the method of production of a filter element according to the present invention requires a combiner machine and an additional capsule inserter kit (known in the art).
- the filters are produced via the production of a multiple length rod.
- the machine tow processing is set to arrange plugs of cellulose acetate tow 8 on to a filter wrapper 9 (garniture) longitudinally at intervals so as to leave spaces between plugs 8.
- a segment anchorage adhesive is applied to filter wrapper 9 at equivalent intervals to the plugs 8 so there is no adhesive in the spaces between plugs.
- segment anchorage gluing is a continual line of glue that hold the segments in place - so that when smoked the segment will not come out into the smokers mouth.
- the method uses pulses of spray adhesive to apply a discontinuous line of adhesive which is in register with the plugs but not in the cavity.
- the wrapper 9 and plugs 8 are brought together ensuring adhesive is in register with the plugs 8 but not in register with the spaces between plugs 8.
- the capsule inserter kit is then set to insert capsules 11 into the spaces between the plugs 8 of cellulose acetate tow by means of a capsule drum.
- the wrapper 9, with adhesive applied to the edge, is gathered and secured around the plugs 8 to form a continuous rod of alternating wrapped plugs 8 and cavities 10 (each cavity 10 containing a capsule 11), such that no adhesive is present in the cavities.
- the adhered wrapper forms a continuous rod of alternating wrapped plugs and cavities with one or more receptacles for an additive enclosed in each cavity.
- the resulting continuous product rod is cut to form individual filters or filter elements.
- Figure 4 shows a tobacco smoke filter or filter element of 27 mm length and 24.5 mm circumference comprising a longitudinally extending cylindrical core 101 which includes first and second longitudinally extending rods of tobacco smoke filtering material 102 and 103 in the form of wrapped acetate crimped tow.
- the first rod of tobacco smoke filtering material 102 is distanced longitudinally from the second rod of tobacco smoke filtering material 103.
- an opaque wrapper 104 of air-permeable plugwrap with an opacity of 71% or more is held in place with an adhesive stuck seam along portions of its length.
- the wrapper 104 defines a cavity 105 of length 5 mm and diameter 7.8 mm between the first and second rods of tobacco smoke filtering material 102 and 103.
- a segment anchoring adhesive is applied to wrapper 104 in register with the first and second rods of tobacco smoke filtering material 102 and 103 (to hold rods 102 and 103 in place) but is not applied in register with the spaces between plugs, as such that no segment anchoring adhesive is present within the cavity 105.
- Engaged around the wrapper 104 is tipping paper 107, used to join the tobacco smoke filter or filter element 101 to a wrapped tobacco rod (although not shown in Figure 4 ).
- a receptacle for additive in the form of a frangible capsule 106 of diameter 3.5 mm, which includes a menthol flavouring agent, is fully enclosed within the cavity 105.
- Frangible capsule 106 has a diameter of less than 50% of the diameter of cavity 105.
- the void space in cavity 105 (e.g. the space not occupied by frangible capsule 106) is 88%.
- the filter A (according to Figure 4 ) was made by the methods described above. Filter A was tested against a conventional filter B with a capsule embedded within the tobacco smoke filtering material well known in the art. The capsule of filter A and the capsule of filter B were crushed prior to smoking to release menthol flavourant.
- the average menthol smoke yield smoke for filters A and B were measured by methods well known in the art (ISO 13110:2012 specifies a method for the gas-chromatographic determination of menthol in the total particulate matter (TPM) of mentholated cigarette smoke condensates). The results are illustrated in Table 1.
- the pad measurement data indicates the yield of menthol in the smoke.
- Table 1 Menthol on pad / mg Filter A 1.19 Filter B 0.75
- the applicants have surprisingly found that positioning of a free moving capsule within the cavity supplies a greater yield of flavourant to the user compared to a capsule embedded within the tobacco smoke filtering material.
- the menthol yield in the smoke is higher when the crushed capsule is positioned within the cavity (and is free to move within the cavity) thus the user experiences increased flavour delivery.
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Description
- The present invention relates to tobacco smoke filters or filter elements for smoking articles such as cigarettes.
- Tobacco smoke filters which include a frangible capsule, or a plurality of frangible capsules, embedded in the tobacco smoke filtering material are well-known. These capsules contain an additive (typically a liquid flavouring agent). The smoker applies pressure to the filter to break the capsule therein to release the flavouring agent. The smoker would usually break the capsule immediately prior to smoking, although they may choose to break it at any stage of the smoking process (or not at all). Such capsule filter products are consequently known as 'flavour-on-demand', indicating that the smoker chooses when, and if, he requires the release of flavour contained within the capsule.
- Tobacco smoke filters which contain a central cavity, surrounded by tobacco smoke filtering material, have been previously described by the applicant e.g. Cavitec® filter. The central cavity is filled with one or more sepiolite granular additives (e.g. a flavourant) with high levels of additive loading. The cavity optimises the effect of the additive providing the user with a consistent flavour level and a cigarette that is always flavoured, including when the pack is first open. However, with these filters the smoker does not have a choice when (if at all) to release the flavour and there is no extra interactive or sensory experience.
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EP2740370 andWO2016/016252 disclose tobacco smoke filters containing a capsule in a cavity.US2017/295842 discloses tobacco smoke filters containing flavourant particles in a cavity. - According to the present invention there is provided a tobacco smoke filter or filter element comprising: a longitudinally extending core which includes first and second longitudinally extending rods of tobacco smoke filtering material, wherein the first rod of tobacco smoke filtering material is distanced longitudinally from the second rod of tobacco smoke filtering material; a wrapper engaged around the first and second longitudinally extending rods such that the wrapper defines a cavity between the first and second rods of tobacco smoke filtering material wherein the wrapper is opaque with an opacity of 71% or more measured according to ISO 2471:2008 (Paper and board - Determination of opacity (paper backing) - Diffuse reflectance method) and a weight of 23 grams per square meter to 100 grams per square meter; and at least one receptacle for an additive located in the cavity, wherein the maximum width or diameter of the receptacle for an additive is less than half the maximum diameter of the cavity and the void space remaining in the cavity is greater than 50% of the volume of the cavity, the receptacle being free to move within the cavity.
- The phrase "being free to move within the cavity" means the receptacle is not fixed or adhered (e.g. with adhesive) within the cavity and has sufficient space to move in all directions (e.g. up, down, forward, back, left, right) in the cavity. When the filter element is moved or shaken the receptacle may move freely in any direction within the cavity. The movement of the receptacle is audible and palpable. It can be sensed (e.g. heard or felt as a vibration) by the user. Herein the term "audible" means within the accepted human hearing range for pitch (Hz) and loudness (dB) i.e. 20 to 20,000 Hz and 0 to 85 dB. Herein the term "palpable" means able to be touched or felt.
- The applicants have found that tobacco smoke filter and filter elements of the invention may provide a unique and enhanced sensory experience for the smoker. Inclusion of a freely moving capsule or capsules within the cavity, capable of moving in all directions within the cavity, creates an audible and palpable rattle when the filter is moved, and an audible and palpable 'pop' when the capsule is broken. These features provide the smoker with both aural and haptic sensations for an enhanced sensory experience when smoking. The movement of the capsule or capsules in all directions within the cavity generates vibrations, the frequencies of which can vary depending on the number, size and composition of capsules as well as the length and circumference of the cavity and the weight, opacity and composition of the wrapper engaged around the cavity. The vibrational frequencies provide the smoker with a new and different feel compared with a conventional filter. The vibrational frequencies of the freely moving capsules may be in particular use in combating anti-counterfeiting, a major problem in the cigarette industry. The vibrational frequencies and audible rattle created by the free movement of the capsule or capsules within the cavity are distinctive and could help to deter counterfeiting of the brand.
- The longitudinally extending core may be substantially cylindrical (including at least the first and second rods of tobacco smoke filtering material and the cavity therebetween). In other words the core is formed from two spaced rods of tobacco smoke filtering material, rather than a single rod of tobacco smoke filtering material. The first rod of tobacco smoke filtering material is distanced longitudinally from the second rod of tobacco smoke filtering material leaving a space therebetween. Preferably the space between the first rod of tobacco smoke filtering material and the second rod of tobacco smoke filtering material is of length 3.5 mm to 32 mm e.g. 3.5 to 26 mm, e.g. 4 to 22 mm, e.g. 5 to 21 mm, e.g. 7 to 14 mm. The first rod of tobacco smoke filtering material and the second rod of tobacco smoke filtering material may be of the same length or of different length.
- The tobacco smoke filtering material of the first rod of tobacco smoke filtering material and the tobacco smoke filtering material of the second of rod tobacco smoke filtering material may be composed of the same or different filtering materials. Preferably the filtering materials are cellulose acetate (e.g. in the form of a crimped filamentary tow). However, cotton or plastics such as polyethylene or polypropylene, natural or synthetic staple fibres, cotton wool, a web material such as paper (usually creped), an (e.g. synthetic) non-woven material, and/or an extruded material (e.g. starch, synthetic foams, extruded foams) are also acceptable. The filtering materials may comprise carbon (e.g. activated carbon) to reduce vapour phase and semi-volatile components in mainstream smoke without the need for ventilation. The filtering material may be cellulose acetate to which a plasticiser has been applied (e.g. plasticised filamentary tow). Triacetin is well known in the art and is typically applied to cellulose acetate filters as a plasticiser (e.g. at around 6-8% w/w).
- The tobacco smoke filter or filter element comprises one or more receptacles for an additive. Herein the term "receptacle for an additive" refers to the, or each receptacle for an additive where there is more than one receptacle. Preferably the receptacle for an additive is a capsule (e.g. a frangible capsule). Preferably the receptacle for an additive (e.g. capsule e.g. frangible capsule) includes an additive in the form of a flavourant. 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 receptacle for an additive may be coloured to identify the flavourant enclosed (e.g. a green capsule for menthol). The receptacle for an additive may comprise more than one flavouring agent (and may provide blends of different flavours). When there is one or more receptacles for an additive the receptacles may contain the same flavourant, or different flavourants. In this example, the user is able to vary the amount of flavourant they receive, and when they receive it, by breaking the required number of receptacles e.g. the user may break one receptacle for an additive at the beginning of smoking and one receptacle for an additive during smoking, allowing the user to vary the smoking experience e.g. provide a boost of flavour during smoking.
- The receptacle for an additive (e.g. a capsule e.g. a frangible capsule) and/or 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 receptacle for an additive 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 receptacle for an additive (e.g. capsule e.g. frangible capsule) may be of
maximum width 2 to 5 mm, e.g. 2.5 to 4 mm, e.g. 2.5 to 3.9 mm, e.g. 3.0 to 3.8 mm, e.g. 3.2 to 3.7 mm, e.g. 3.35 or 3.5 mm. The maximum width herein refers to the measurement across the receptacle at its broadest point, so for a spherical capsule or substantially cylindrical capsule it refers to the diameter. The receptacle for an additive may include from 5 to 30 mg flavourant, e.g. 7 to 25 mg, e.g. 10 to 25 mg, e.g. 10 to 20 mg. - The receptacle for an additive (e.g. a capsule e.g. a frangible capsule) is freely moveable within the central cavity. This means that the receptacle for an additive is not fixed or adhered (e.g. with adhesive) to the filter wrapper or the first and second rods of tobacco smoke filtering material. The maximum width or diameter (if spherical or substantially spherical) of the receptacle is less than half the maximum diameter of the cavity. The volume of the receptacle (e.g. the space the receptacle occupies) is such that the void space (e.g. the space the receptacle does not occupy) remaining in the cavity is greater than 50% of the volume of the cavity (e.g. 51 to 90 %, e.g. 55 to 80 % e.g. 60 to 75 %). The receptacle for an additive is therefore free to move in all directions (e.g. longitudinally and latitudinally) within the void space in the cavity and in doing so creates an audible and palpable rattle when the filter is moved or shaken. The receptacle for an additive is not visible (to the smoker) at the mouth or buccal end of the filter or filter element, or at the mouth end of a cigarette including a filter of this aspect of the invention.
- The applicants have surprisingly found that positioning of a free moving capsule within the cavity supplies a greater yield of flavourant to the user compared to positioning of the capsule embedded (and immovably) within the tobacco smoke filtering material. The menthol yield in the smoke is higher when the crushed capsule is positioned within the cavity (and is free to move within the cavity) thus the smoker experiences increased flavour delivery.
- The wrapper is engaged around the longitudinally extending core and engaged around the first and second rods of tobacco smoke filtering material and defines a cavity between the first and second rods of tobacco smoke filtering material. The closest ends (e.g. the facing ends) of the first and second rods of tobacco smoke filtering material, together with the internal surface of the wrapper define the cavity. At least one receptacle for an additive is freely located in the cavity. Preferably the cavity is of length 3.5 mm to 32 mm e.g. 3.5 to 25 mm, e.g. 4 to 22 mm, e.g. 5 to 21 mm, e.g. 7 to 14 mm. The cavity may be of circumference from 14 to 28 mm, e.g. 16 to 26 mm, e.g. 16 to 25 mm, e.g. 16 to 19 mm, e.g. 24 to 25 mm. The cavity may have a maximum diameter from 5 mm to 10 mm, e.g. 5.3 mm to 7.8 mm. It will be appreciated that the circumference and diameter of the cavity will be substantially the same as the circumference and diameter of the filter or filter element. The cavity may vary in position within the longitudinally extending core, for example the cavity may be substantially central within the longitudinally extending core or positioned towards one end of the longitudinally extending core.
- Adhesive is applied to the wrapper in register with the plugs of tobacco smoke filtering material but not in register with the space between plugs. In other words, the region of the cavity is free of adhesive and only the first and second rods of tobacco smoke filtering material are adhered to the wrapper. This allows the capsule to move freely in the central cavity. The adhesive may be any conventional filter wrapper adhesive known in the art and may be applied by methods well known in the art.
- In a further example, the wrapper may be coloured (e.g. green) providing further visual differentiation from conventional filters. The colour of the wrapper (e.g. a green wrapper for menthol) may also be used to identify the flavour provided by the receptacle for an additive.
- The wrapper may be a paper, e.g. plugwrap. The wrapper may be coated to minimise absorption of liquids released from the ruptured capsule, as is well-known in the art. The wrapper may be standard or porous depending on ventilation requirements. The wrapper may be air permeable filtering paper (e.g. corrugated air permeable filtering paper) or a wrapper of cellulose acetate (e.g. crimped air permeable cellulose acetate). The weight of the inner wrapper is from 23 grams per square meter to 100 grams per square meter, e.g. 80 grams per square meter. The wrapper may include a still further flavouring agent located thereon, which may be any flavouring agent known for use in tobacco smoke filters or filter elements (e.g. the flavouring agent may be menthol, spearmint, peppermint, nutmeg, cinnamon, clove, lemon, chocolate, peach, strawberry, vanilla etc.). The wrapper is opaque, with an opacity of 71% or more (e.g. 71% to 100%, e.g. 71% to 80%, e.g. 80% to 90%, e.g. 90% to 100%). Herein the term "opacity" means a value measured according to ISO 2471:2008 Paper and board - Determination of opacity (paper backing) - Diffuse reflectance method). The weight and opacity of the wrapper may influence the vibrational frequencies generated by the movement of the capsule or capsules in all directions within the cavity. Further the weight and opacity of the wrapper may affect the aural and haptic sensations experienced by the user when the filter or filter element is moved or shaken.
- The tobacco smoke filter or filter element may be of
length 10 to 45 mm, e.g. 15 to 35 mm e.g. 11 to 25 mm, e.g. 12 to 16 mm, , e.g. 20 to 30 mm. The filter or filter element may be of circumference from 14 to 28 mm, e.g. 16 to 26 mm, e.g. 16 to 25 mm, e.g. 16 to 19 mm, e.g. 24 to 25 mm. The filter or filter element may have a maximum diameter from 5 mm to 10 mm, e.g. 5.3 mm to 7.8 mm. The tobacco smoke filter or filter element may be used in smoking articles (e.g. a cigarette, e.g. a tobacco heat product) in a variety of different circumferences (e.g. microslim e.g. superslim, e.g. slim, e.g. standard, e.g. king size). - The present invention provides a smoking article (e.g. cigarette, e.g. tobacco heat product) comprising a tobacco smoke filter or filter element according to the invention. The tobacco smoke filter or filter element of the present invention is suitable for use with all varieties of tobacco blends. In a filter smoking article according to the invention, 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).
- 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. The tobacco smoke filter or filter element may also be incorporated into a multi-segment filter as a single segment.
- The tobacco smoke filter or filter element of the present invention may be made by the following method. The method comprises the steps of:
- (a) arranging plugs of tobacco smoke filtering material on a filter wrapper (e.g. garniture) longitudinally at intervals so as to leave spaces between plugs;
- (b) applying adhesive to the filter wrapper in register with the arranged plugs, so there is no adhesive in register with the spaces between the plugs;
- (c) gathering the wrapper and plugs together such that the adhesive will be in register with the plugs but not in register with the spaces between plugs;
- (d) inserting receptacles for an additive (e.g. a capsule, e.g. a frangible capsule) into spaces between the plugs of tobacco smoke filtering material (e.g. as the wrapper and plugs are gathered together);
- (e) securing the wrapper around the plugs of tobacco smoke filtering material (e.g. using further adhesive applied to the edge of the wrapper) to form a continuous rod of alternating wrapped plugs and cavities, such that no adhesive is present in the cavities; and optionally;
- (f) cutting the resulting continuous product rod to form individual filters or filter elements.
- The method of production of a tobacco smoke filter or filter element of the present invention allows for use of standard cellulose acetate tow items for example NWA (non-wrapped acetate) filtering plugs. It will be appreciated that other materials that are well known in the art may be used to form the tobacco smoke filter material, wrapper and receptacle for an additive.
- The method of production of a tobacco smoke filter or filter element of the present invention requires a combiner machine and an additional capsule inserter kit (known in the art). The filters are produced via the production of a multiple length rod. The machine tow processing is set to arrange plugs of cellulose acetate tow on to a filter wrapper (garniture) longitudinally at intervals so as to leave spaces between plugs. A segment anchorage adhesive is applied to filter wrapper at equivalent intervals to the plugs so there is no adhesive in the spaces between plugs. The wrapper and plugs are brought together ensuring adhesive is in register with the plugs but not in register with the spaces between plugs. The capsule inserter kit is then set to insert capsules into the spaces between the plugs of cellulose acetate tow by means of a capsule drum. A filter containing two or more capsules may also be produced. The wrapper, with adhesive applied to the edge, is gathered and secured around the plugs to form a continuous rod of alternating wrapped plugs and cavities, such that no adhesive is present in the cavities. The adhered wrapper forms a continuous rod of alternating wrapped plugs and cavities with one or more receptacles for an additive enclosed in each cavity. An optional step of cutting the resulting continuous product rod to form individual filters or filter elements may then be executed.
- The continuous rod may be cut through each plug of tobacco smoke filtering material. Cutting may occur at any position through the plug of tobacco smoke filtering material to produce variations in size of the first and second plugs of tobacco smoke filtering material and cavity position within the longitudinally extending core. For example, cutting longitudinally through the centre of the plugs of tobacco smoke filtering material will create individual tobacco smoke filter or filter elements with first and second longitudinally extending rods of tobacco smoke filtering material of equal size surrounding a centrally located cavity. Cutting at other positions will create individual tobacco smoke filter or filter elements with first and second longitudinally extending rods of tobacco smoke filtering material of different size surrounding an off-centre cavity. The filter or filter element length will not be affected by variation in cutting, and the performance (e.g. the pressure drop) of the final filter will be consistent.
- The present invention will now be illustrated by way of an example with reference to the accompanying drawing.
-
Figure 1 shows a perspective view, not to scale, of a tobacco smoke filter or filter element according to an example of the invention. -
Figure 2 shows a cross-section, not to scale, view ofFigure 1 when cut along the filter's longitudinal axis. -
Figure 3 shows a birds-eye-view of a cross section, not to scale, of the method of production of a multiple length rod according to an example of the invention. -
Figure 4 shows a perspective view, not to scale, of a tobacco smoke filter or filter element according to a second example of the invention. -
Figure 1 and 2 show a tobacco smoke filter or filter element of 27 mm length and 24.5 mm circumference comprising a longitudinally extendingcylindrical core 1 which includes first and second longitudinally extending rods of tobaccosmoke filtering material smoke filtering material 2 is distanced longitudinally from the second rod of tobaccosmoke filtering material 3. Engaged around the first and second longitudinally extendingrods 2, 3 (and the distance between) is awrapper 4 of transparent air-permeable plugwrap which is held in place with an adhesive stuck seam along portions of its length. Thewrapper 4 defines acavity 5 oflength 5 mm and diameter 7.8 mm between the first and second rods of tobaccosmoke filtering material wrapper 4 in register with the first and second rods of tobaccosmoke filtering material 2 and 3 (to holdrods cavity 5. A receptacle for additive in the form of afrangible capsule 6 of diameter 3.5 mm, which includes a menthol flavouring agent, is fully enclosed within thecavity 5.Frangible capsule 6 has a diameter of less than 50% of the diameter ofcavity 5. The void space in cavity 5 (e.g. the space not occupied by frangible capsule 6) is 88%. The dimensions of thefrangible capsule 6 in relation to the dimensions ofcavity 5 and the absence of adhesive within the cavity, mean thatcapsule 6 is free to move within thecavity 5. Thewrapper 4 serves as a window intocavity 5 which may be used to identify the flavourant in the capsule 6 (e.g. a green capsule for menthol) and establish whether or not thecapsule 6 has been broken. Thiswrapper 4 further differentiates the filter for anti-counterfeiting purposes. In other examples thewrapper 4 may be opaque with an opacity of 71% or more (measured according to ISO 2471:2008 Paper and board - Determination of opacity (paper backing) - Diffuse reflectance method). - It will be appreciated that 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). -
Figure 3 illustrates a birds-eye-view of a cross section of the method of production of a multiple length rod according to an example of the invention. The continuous rod offilters 7 comprises plugs of tobacco smoke filtering material 8, which are adhered towrapper 9. No adhesive is present within thecavity 10 hencecapsule 11 is able to move freely within the cavity. The continuous rod offilters 7 may be cut to create individual tobacco smoke filter or filter elements as inFigure 1 and 2 . It will be appreciated that cutting may occur at a range of positions through the plugs of tobacco smoke filtering material to create individual tobacco smoke filter or filter elements. - The method of production of a filter element according to the present invention requires a combiner machine and an additional capsule inserter kit (known in the art). The filters are produced via the production of a multiple length rod. The machine tow processing is set to arrange plugs of cellulose acetate tow 8 on to a filter wrapper 9 (garniture) longitudinally at intervals so as to leave spaces between plugs 8. A segment anchorage adhesive is applied to filter
wrapper 9 at equivalent intervals to the plugs 8 so there is no adhesive in the spaces between plugs. Conventionally, segment anchorage gluing is a continual line of glue that hold the segments in place - so that when smoked the segment will not come out into the smokers mouth. The method uses pulses of spray adhesive to apply a discontinuous line of adhesive which is in register with the plugs but not in the cavity. Thewrapper 9 and plugs 8 are brought together ensuring adhesive is in register with the plugs 8 but not in register with the spaces between plugs 8. The capsule inserter kit is then set to insertcapsules 11 into the spaces between the plugs 8 of cellulose acetate tow by means of a capsule drum. Thewrapper 9, with adhesive applied to the edge, is gathered and secured around the plugs 8 to form a continuous rod of alternating wrapped plugs 8 and cavities 10 (eachcavity 10 containing a capsule 11), such that no adhesive is present in the cavities. The adhered wrapper forms a continuous rod of alternating wrapped plugs and cavities with one or more receptacles for an additive enclosed in each cavity. The resulting continuous product rod is cut to form individual filters or filter elements. -
Figure 4 shows a tobacco smoke filter or filter element of 27 mm length and 24.5 mm circumference comprising a longitudinally extendingcylindrical core 101 which includes first and second longitudinally extending rods of tobaccosmoke filtering material smoke filtering material 102 is distanced longitudinally from the second rod of tobaccosmoke filtering material 103. Engaged around the first and second longitudinally extendingrods 102, 103 (and the distance between) is anopaque wrapper 104 of air-permeable plugwrap with an opacity of 71% or more (measured according to ISO 2471:2008 Paper and board - Determination of opacity (paper backing) - Diffuse reflectance method), which is held in place with an adhesive stuck seam along portions of its length. Thewrapper 104 defines acavity 105 oflength 5 mm and diameter 7.8 mm between the first and second rods of tobaccosmoke filtering material wrapper 104 in register with the first and second rods of tobaccosmoke filtering material 102 and 103 (to holdrods cavity 105. Engaged around thewrapper 104 is tippingpaper 107, used to join the tobacco smoke filter orfilter element 101 to a wrapped tobacco rod (although not shown inFigure 4 ). A receptacle for additive in the form of afrangible capsule 106 of diameter 3.5 mm, which includes a menthol flavouring agent, is fully enclosed within thecavity 105.Frangible capsule 106 has a diameter of less than 50% of the diameter ofcavity 105. The void space in cavity 105 (e.g. the space not occupied by frangible capsule 106) is 88%. The dimensions of thefrangible capsule 106 in relation to the dimensions ofcavity 105 and the absence of adhesive within thecavity 105, mean thatcapsule 106 is free to move within thecavity 105. - An experiment was performed in order to measure the effect the capsule in the cavity had on the menthol yield in the smoke. The filter A (according to
Figure 4 ) was made by the methods described above. Filter A was tested against a conventional filter B with a capsule embedded within the tobacco smoke filtering material well known in the art. The capsule of filter A and the capsule of filter B were crushed prior to smoking to release menthol flavourant. - The average menthol smoke yield smoke for filters A and B were measured by methods well known in the art (ISO 13110:2012 specifies a method for the gas-chromatographic determination of menthol in the total particulate matter (TPM) of mentholated cigarette smoke condensates). The results are illustrated in Table 1. The pad measurement data indicates the yield of menthol in the smoke.
Table 1 Menthol on pad / mg Filter A 1.19 Filter B 0.75 - The applicants have surprisingly found that positioning of a free moving capsule within the cavity supplies a greater yield of flavourant to the user compared to a capsule embedded within the tobacco smoke filtering material. The menthol yield in the smoke is higher when the crushed capsule is positioned within the cavity (and is free to move within the cavity) thus the user experiences increased flavour delivery.
Claims (15)
- A tobacco smoke filter or filter element comprising: a longitudinally extending core (1) which includes first (2) and second (3) longitudinally extending rods of tobacco smoke filtering material, wherein the first (2) rod of tobacco smoke filtering material is distanced longitudinally from the second (3) rod of tobacco smoke filtering material; a wrapper (4) engaged around the first (2) and second (3) longitudinally extending rods such that the wrapper (4) defines a cavity (5) between the first (2) and second (3) rods of tobacco smoke filtering material wherein the wrapper (4) is opaque with an opacity of 71% or more measured according to ISO 2471:2008 (Paper and board - Determination of opacity (paper backing) - Diffuse reflectance method) and a weight of 23 grams per square meter to 100 grams per square meter; and at least one receptacle for an additive (6) located in the cavity (5), wherein the maximum width or diameter of the receptacle for an additive (6) is less than half the maximum diameter of the cavity (5) and the void space remaining in the cavity (5) is greater than 50% of the volume of the cavity (5), the receptacle (6) being free to move within the cavity.
- A tobacco smoke filter or filter element according to claim 1 wherein the receptacle for an additive (6) is a capsule, e.g. a frangible capsule and/or the receptacle for an additive includes an additive in the form of a flavourant.
- A tobacco smoke filter or filter element according to any preceding claim wherein the void space remaining in the cavity (5) is 51 to 90 %, e.g. 55 to 80 %, e.g. 60 to 75 % of the volume of the cavity.
- A tobacco smoke filter or filter element according to any preceding claim wherein the longitudinally extending core (1) is a substantially cylindrical core.
- A tobacco smoke filter or filter element according to any preceding claim wherein the tobacco smoke filtering material of the first (2) and/or second (3) rod of tobacco smoke filtering material comprises a natural or synthetic filamentary tow, e.g. of cotton or plastics such as polyethylene or polypropylene, or cellulose acetate filamentary tow, natural or synthetic staple fibres, cotton wool, a web material such as paper, usually creped, an e.g. synthetic non-woven material, and/or an extruded material e.g. (e.g. starch, synthetic foams, extruded foams.
- A tobacco smoke filter or filter element according to any preceding claim wherein the filtering material includes carbon, e.g. activated carbon.
- A tobacco smoke filter or filter element according to any preceding claim wherein the tobacco smoke filtering material of first (2) rod of tobacco smoke filtering material and the tobacco smoke filtering material of the second (3) rod of tobacco smoke filtering material are different.
- A tobacco smoke filter or filter element according to any preceding claim wherein the longitudinally extending core (1) is of perimeter or circumference 14 to 28 mm, e.g. 16 to 26 mm, e.g. 16 to 25 mm, e.g. 16 to 19 mm, e.g. 24 to 25 mm.
- A tobacco smoke filter or filter element according to any preceding claim wherein the cavity (5) is of length 3.5 mm to 32 mm e.g. 3.5 to 25 mm, e.g. 4 to 22 mm, e.g. 5 to 21 mm, e.g. 7 to 14 mm.
- A tobacco smoke filter or filter element according to any preceding claim wherein the region of the cavity (5) is free of adhesive.
- A tobacco smoke filter or filter element according to any preceding claim wherein the receptacle for an additive (6), e.g. capsule, is of width 2 to 5 mm, e.g. 2.5 to 4 mm, e.g. 2.5 to 3.9 mm, e.g. 3.0 to 3.8 mm, e.g. 3.2 to 3.7 mm, e.g. 3.35 or 3.5 mm.
- A tobacco smoke filter or filter element according to any preceding claim wherein the diameter of the longitudinally extending core (1) is at least 0.7 mm greater than the maximum width of the receptacle for an additive (6).
- A smoking article, e.g. a cigarette, e.g. a tobacco heat product, comprising a tobacco smoke filter according to any preceding claim, or a tobacco smoke filter including a filter element according to any preceding claim, joined to a wrapped tobacco rod with one end of the filter towards the tobacco.
- A multiple rod comprising a plurality, e.g. 2, 4, 6 etc. of tobacco smoke filters or filter elements according to any preceding claim integrally joined end-to-end.
- A tobacco smoke filter or filter element according to any claim 1-12 wherein the cavity (5) has a diameter from 5 mm to 10 mm, e.g. 5.3 mm to 7.8 mm.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB1917410.1A GB201917410D0 (en) | 2019-11-29 | 2019-11-29 | Tobacco smoke filter |
GBGB2013546.3A GB202013546D0 (en) | 2020-08-28 | 2020-08-28 | Tobacco smoke filter |
PCT/EP2020/083731 WO2021105427A1 (en) | 2019-11-29 | 2020-11-27 | Tobacco smoke filter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3880010A1 EP3880010A1 (en) | 2021-09-22 |
EP3880010B1 true EP3880010B1 (en) | 2023-05-03 |
Family
ID=73642895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20816155.4A Active EP3880010B1 (en) | 2019-11-29 | 2020-11-27 | Tobacco smoke filter |
Country Status (9)
Country | Link |
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US (1) | US20220400743A1 (en) |
EP (1) | EP3880010B1 (en) |
JP (1) | JP2023503488A (en) |
KR (1) | KR20220110232A (en) |
CN (2) | CN217161063U (en) |
HU (1) | HUE062360T2 (en) |
LT (1) | LT3880010T (en) |
PL (1) | PL3880010T3 (en) |
WO (1) | WO2021105427A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113951569A (en) * | 2021-12-01 | 2022-01-21 | 云南中烟工业有限责任公司 | Two-section type circumferential heating aerosol generating device and using method |
USD984726S1 (en) * | 2023-01-30 | 2023-04-25 | Jie Wu | Cigarette filter |
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US4174720A (en) * | 1977-04-26 | 1979-11-20 | Liggett Group Inc. | Glue transfer apparatus for cigarette filters |
US20120305014A1 (en) * | 2009-12-31 | 2012-12-06 | British American Tobacco (Investments) Limited | Filter for a Smoking Article |
EP2740370A1 (en) * | 2011-08-05 | 2014-06-11 | Japan Tobacco, Inc. | Cigarette |
EP2818060A1 (en) * | 2012-02-20 | 2014-12-31 | Japan Tobacco, Inc. | Cigarette |
WO2016016252A1 (en) * | 2014-07-31 | 2016-02-04 | Jt International Sa | Filter element for a smoking article |
US20170295842A1 (en) * | 2016-04-19 | 2017-10-19 | Altria Client Services Llc | Application of a flavorant particle in a filter of a smoking article for delivering flavor |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108926033A (en) * | 2018-09-01 | 2018-12-04 | 江西中烟工业有限责任公司 | A kind of heating that adding solid-state perfume (or spice) pearl is not burnt cigarette filter rod |
-
2020
- 2020-11-27 US US17/779,368 patent/US20220400743A1/en active Pending
- 2020-11-27 EP EP20816155.4A patent/EP3880010B1/en active Active
- 2020-11-27 PL PL20816155.4T patent/PL3880010T3/en unknown
- 2020-11-27 KR KR1020227021420A patent/KR20220110232A/en unknown
- 2020-11-27 LT LTEPPCT/EP2020/083731T patent/LT3880010T/en unknown
- 2020-11-27 CN CN202090000462.2U patent/CN217161063U/en active Active
- 2020-11-27 WO PCT/EP2020/083731 patent/WO2021105427A1/en unknown
- 2020-11-27 JP JP2022531038A patent/JP2023503488A/en active Pending
- 2020-11-27 HU HUE20816155A patent/HUE062360T2/en unknown
- 2020-11-27 CN CN202221672175.3U patent/CN218457261U/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4174720A (en) * | 1977-04-26 | 1979-11-20 | Liggett Group Inc. | Glue transfer apparatus for cigarette filters |
US20120305014A1 (en) * | 2009-12-31 | 2012-12-06 | British American Tobacco (Investments) Limited | Filter for a Smoking Article |
EP2740370A1 (en) * | 2011-08-05 | 2014-06-11 | Japan Tobacco, Inc. | Cigarette |
EP2818060A1 (en) * | 2012-02-20 | 2014-12-31 | Japan Tobacco, Inc. | Cigarette |
WO2016016252A1 (en) * | 2014-07-31 | 2016-02-04 | Jt International Sa | Filter element for a smoking article |
US20170295842A1 (en) * | 2016-04-19 | 2017-10-19 | Altria Client Services Llc | Application of a flavorant particle in a filter of a smoking article for delivering flavor |
Also Published As
Publication number | Publication date |
---|---|
CN217161063U (en) | 2022-08-12 |
KR20220110232A (en) | 2022-08-05 |
US20220400743A1 (en) | 2022-12-22 |
HUE062360T2 (en) | 2023-10-28 |
WO2021105427A1 (en) | 2021-06-03 |
PL3880010T3 (en) | 2023-09-04 |
LT3880010T (en) | 2023-08-10 |
CN218457261U (en) | 2023-02-10 |
JP2023503488A (en) | 2023-01-30 |
EP3880010A1 (en) | 2021-09-22 |
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