EP2745717A1 - Gefrorene Kapseln und Herstellungsverfahren dafür - Google Patents

Gefrorene Kapseln und Herstellungsverfahren dafür Download PDF

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Publication number
EP2745717A1
EP2745717A1 EP12197703.7A EP12197703A EP2745717A1 EP 2745717 A1 EP2745717 A1 EP 2745717A1 EP 12197703 A EP12197703 A EP 12197703A EP 2745717 A1 EP2745717 A1 EP 2745717A1
Authority
EP
European Patent Office
Prior art keywords
capsule
core
smoking article
envelope
filter
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.)
Withdrawn
Application number
EP12197703.7A
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English (en)
French (fr)
Inventor
Davin McLaughlin
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.)
JT International SA
Original Assignee
JT International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JT International SA filed Critical JT International SA
Priority to EP12197703.7A priority Critical patent/EP2745717A1/de
Publication of EP2745717A1 publication Critical patent/EP2745717A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/281—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed
    • A24B15/283—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed by encapsulation of the chemical substances
    • 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 a breakable capsule for a smoking article and a method of making such capsules.
  • the invention relates to a breakable capsule which can be broken easily by the user, and a method of making capsules by incorporating a freezing step.
  • the purpose of the component(s) is to allow a user to activate it when desired to alter the smoke during the smoking process.
  • the component is often provided in the form of a capsule which is crushed by a user to add flavour to smoke while using the smoking article.
  • breakable capsules typically comprise an essentially free-flowing liquid core of negligible mechanical strength and an external shell of sufficient rigidity to survive the manufacturing process of the smoking article filters and smoking article such as cigarettes. This results in the capsules often being difficult to rupture in the smoking article filters, requiring much effort from the user and often causes visible damage to the integrity of the smoking article.
  • an object of the present invention is to provide a new, easily breakable capsule for smoking articles but which can undergo strong mechanical stresses applied during the manufacture of smoking article filters and smoking articles.
  • capsule refers to a delivery system of a substance, said substance being hereinafter referred to as "the core” which is enclosed in a capsule envelope.
  • breakable capsule refers to a capsule wherein the capsule envelope can be broken by means of a pressure to release the core, more specifically, the capsule envelope can be ruptured under the pressure imposed by the smoker's fingers when the smoker wants to release the core of the capsule.
  • the method of the invention advantageously comprises a freezing step to freeze the content, the core of the capsule and/or its envelope. Freezing the capsule allows for use of breakable capsules having low crush strength as the freezing of the capsule's core provides sufficient strength to the capsule to undergo the manufacturing process of smoking article filters and smoking articles such as cigarettes comprising such breakable capsule in the filter.
  • a typical manufacturing process of smoking article filters comprising a breakable capsule sees a capsule being introduced or fed from a reservoir into the stream of filter tow prior to its passing through the garniture which forms the filter rod.
  • the presence of the capsule naturally creates its own space within the filter by displacing the filter tow and results in a snug fit.
  • the capsule is largely insulated from external forces by the surrounding filter tow. Therefore breakable capsules only need to have high crush strength to prevent unwanted capsule rupture during manufacture of smoking article filters, but can and need to show much lower crush strength throughout the remainder of the product lifecycle.
  • a smoking article which comprises a breakable capsule which is not only easy to manufacture (i.e. minimising rupture) but also easily breakable by the user.
  • the core of the breakable capsule as provided in step (i) comprises at least water, propylene glycol, glycerol, ethanol, polyethylene glycols or any combination thereof.
  • the core comprises at most 50 % water by total weight of the capsule, preferably less than 50% water by total weight of the capsule to control expansion of the capsule core in the frozen state.
  • the core of the breakable capsule of the invention may also comprise a base of oil (e.g. Mygliol ®) and ethanol as described in EP 1 906 775 B1 .
  • the core of the capsule may contain flavour and aroma compounds such as those typically used in tobacco products (fruity, floral, menthol, vanilla, coffee, chocolate, cinnamon etc.), smoke modifying agents such as acids and bases and solubilising / emulsifying agents (such as surfactants), gelling agents and other stabilising agents (such as preservatives).
  • flavour and aroma compounds such as those typically used in tobacco products (fruity, floral, menthol, vanilla, coffee, chocolate, cinnamon etc.
  • smoke modifying agents such as acids and bases and solubilising / emulsifying agents (such as surfactants), gelling agents and other stabilising agents (such as preservatives).
  • the structural integrity required for the capsule to survive the manufacturing process of smoking article filters and smoking articles comes from the solidified contents; the actual structural rigidity of the envelope material being largely irrelevant.
  • the rigidity of the envelope is not critical to overall performance, a wider range of materials can be used to produce the envelope, e.g. thin plastics like polyolefins.
  • capsules are manufactured by a co-extrusion method as described in EP 1 906 775 B1 whereby the core liquid is extruded within a liquid envelope. This envelope is then hardened by cooling, crosslinking, etc. and often a final barrier layer is then applied to protect the envelope from moisture ingress, etc.
  • the inner liquid core is hydrophobic and the envelope hydrophilic; whilst this adequately prevents mixing it also means that the envelope material is vulnerable to attack by moisture, resulting in softening and potential rupture. Often moisture ingress is prevented by applying an external glaze, which adds an extra step and additional ingredients to the manufacturing process.
  • Such capsules cannot use water within the liquid core, meaning such technology cannot add water to the smoke upon activation nor can it use water soluble flavours.
  • the capsule envelope of the present invention requires only to be impermeable to the liquid core to prevent leakage before freezing and after melting and until activation by an end user.
  • the capsule envelope should be sufficiently flexible to survive the volume expansion at freezing and contraction upon melting without losing integrity.
  • suitable materials for use as the capsule envelope include, but not limited to, polymers selected from the group consisting of polyolefin, polyacetal, polyamide, polyimide, polyester, polycarbonate, polyacrylate, elastomer, natural rubber, synthetic rubber, polystyrene, polyvinylacetate, polyvinylalcohol, polyvinylchloride and combinations thereof.
  • a polyolefin material particularly, polyethylene is used since it is widely compatible with both hydrophobic and hydrophilic liquids including water.
  • the thickness of the capsule envelope may be between 0.01 and 0.5 mm, preferably between 0.01 and 0.1 mm, and even more preferably between 0.01 and 0.05 mm.
  • the weight of the capsule envelope is preferably between 5 and 50%, more preferably between 10 and 20% by total weight of the capsule.
  • the ability of the capsule to rupture is measured through the crush strength to be exerted to rupture the capsule.
  • the crush strength of the capsule can for example be measured using a LLOYD LFPlus Series Digital Material Tester having a 100N load cell.
  • the capsule according to the present invention preferably has a crush strength of between 0.5 and 5 kp when the core of the capsule is in a frozen state. More preferably, the crush strength of the capsule is between 1 and 3 kp, when the core of the capsule is in the frozen state.
  • the capsule according to the present invention preferably has a crush strength of between 0.1 and 0.4 kp when the core of the capsule is in a melted/liquid state. More preferably, the crush strength of the capsule is between 0.1 and 0.3 kp, at room temperature.
  • room temperature mean a temperature comprised in range of about 10 to 30 °C.
  • the capsule may take any shape which would be known to those skilled in the art, depending on the manufacturing process.
  • the capsule may be spherical, ellipsoidal, cylindrical, cubic or cuboidal.
  • the capsule is spherical or ellipsoidal.
  • the capsule preferably has a largest outer dimension of between 2 and 20 mm, more preferably between 4 and 15 mm, and even more preferably between 4 and 10 mm.
  • the capsule When the capsule is non-spherical in shape, it is preferably elongated along a longitudinal direction x wherein the outer dimension is of between 2 and 20 mm, more preferably between 4 and 15 mm, and even more preferably between 4 and 10 mm.
  • the outer dimension of the capsule in a direction transverse to said longitudinal direction x is of between 2 and 10 mm, more preferably between 3 and 5 mm, and even more preferably between 3 and 4 mm.
  • the total weight of the capsule according to the invention is preferably between 5 and 60 mg, more preferably between 10 and 50 mg and even more preferably between 20 and 40 mg.
  • a breakable capsule according to the present invention may be formed by first providing a liquid core which contains at least 70% water, propylene glycol, glycerol, ethanol, polyethylene glycols or any combination thereof.
  • the core may further comprise flavour and aroma compounds, smoke modifying agents, gelling agents and other stabilising agents.
  • a capsule envelope of desired shape and size is then formed, and the envelope is filled with the liquid core.
  • the liquid core is then frozen into the capsule envelope to form the final capsule.
  • the capsule in its frozen state is then introduced into the filter to provide the assembled filters comprising the capsule. These filters are then incorporated into cigarettes to provide a cigarette containing the breakable capsule.
  • the liquid core which is formed as described above may be poured into molds of desired shape and size to provide filled molds containing the liquid core.
  • the core is then frozen into the desired shape and size. Once the core is removed from the molds, a capsule envelope is formed around the frozen core to provide the final capsule.
  • the capsule may then be introduced into the filter and subsequently the cigarette in the same manner as described for the earlier method.
  • the capsule containing the liquid core as described above may take any form. In particular, it may be spherical, as shown in Figure 2A , ellipsoidal as shown in Figure 2B or cylindrical, as shown in Figure 2C .
  • the capsule may further be in the form of a blister pack as shown in Figure 2D , a pillow pack as shown in Figure 2E or a stick or tube pack as shown in Figure 2F .
  • blister pack refers to a sealed bubble or pouch for enclosing the liquid core.
  • the term “pillow pack” includes a pack which is formed from one sheet by providing a core in the centre of the sheet. The sheet is then subsequently folded over and sealed on the remaining three sides. It may also refer to a pack which is formed by providing a core in the centre of one sheet, and then placing a further sheet on top of the first sheet such that the core is enclosed. Subsequent sealing of all sides around the core provides the desired capsule.
  • tube pack refers to a pack which is formed from a continuous tube of material, into which the core may be inserted and then sealed on either end of the core.
  • the tube pack may further include those that are formed by placing a core in the centre of a sheet which is subsequently rolled to enclose the core and then sealed along the longitudinal line to form a sealed tube. The ends on either side of the core may then subsequently be sealed to form the capsule.
  • the capsule envelope may be formed from any material an in any thickness as described herein.
  • the capsule envelope is formed from polyethylene with a thickness of between 0.01 and 0.05 mm.
  • the breakable capsule may take any shape, size and crush strength as described herein.
  • a polyolefin film of thickness 0.025mm is formed into a continuous tube by creating a continuous longitudinal seal. One end of the tube is then sealed and the liquid contents are introduced. The top is then sealed to form a stick pack. The stick pack may then be cut into individual capsules or the continuous strip of capsule may be retained to ease subsequent handling in later manufacturing steps.
  • a three sided pocket is formed via heat seals.
  • the liquid contents are then introduced via injection and the fourth side is heat sealed to form a pillow pack with liquid contents.
  • thermoform plastic may be shaped into blisters, and the liquid may be introduced.
  • the top layer may then be sealed onto the plastic base.
  • Individual blisters / capsule can then be cut out or retained en masse as above.
  • the contents of the core may be frozen into the required shape using moulds.
  • the frozen core may then be introduced into pre-formed plastic tubing or between layers of capsule envelope material, and then sealed. Individual blisters / capsule can then be cut out or retained en masse as above.
  • the core of the capsule may then be left to melt, and then subsequently frozen again, prior to insertion into the filter / smoking article.
  • the contents of the core may be frozen into the required shape using moulds.
  • the frozen core may then be coated with a liquid capsule envelope material along with a hardener and/or crosslinking agent.
  • the capsule envelope coating may then be cured to provide individual capsules containing the core.
  • the core of the capsule may then be left to melt, and then subsequently frozen again, prior to insertion into the filter / smoking article.
  • the freezing/solidifying temperature will be dependent upon the composition of the liquid contents. Pure water will freeze at 0°C, whereas, a mixture of water & propylene glycol will freeze in the range of approximately 0°C ⁇ -39°C depending on the specific composition of the mixture. Dissolved solutes may also depress the freezing temperature.
  • the method of introducing a frozen capsule into a smoking article is not particularly limiting, so long as it comprises the steps of providing a frozen capsule formed according to the method described above, and inserting said capsule inside the tip of a smoking article.
  • the freezing step to incorporate the capsule into the smoking article may be carried out at any time after the manufacture of the capsule and before insertion into the filter / smoking article.
  • Frozen capsules described above are stable, easy to handle and transport. Although the melting process does not happen rapidly, it is preferable that any equipment contacting the frozen capsule prior to insertion such as reservoirs is refrigerated for ease of handling.
  • the present invention is also directed to a breakable capsule for a smoking article having a crush strength of 0.1 to 0.4 kp and a filter for a smoking article comprising such a capsule.
  • the present invention also includes smoking articles comprising a tip containing a capsule and the use of the capsule formed by the described method in a smoking article.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
EP12197703.7A 2012-12-18 2012-12-18 Gefrorene Kapseln und Herstellungsverfahren dafür Withdrawn EP2745717A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12197703.7A EP2745717A1 (de) 2012-12-18 2012-12-18 Gefrorene Kapseln und Herstellungsverfahren dafür

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12197703.7A EP2745717A1 (de) 2012-12-18 2012-12-18 Gefrorene Kapseln und Herstellungsverfahren dafür

Publications (1)

Publication Number Publication Date
EP2745717A1 true EP2745717A1 (de) 2014-06-25

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EP12197703.7A Withdrawn EP2745717A1 (de) 2012-12-18 2012-12-18 Gefrorene Kapseln und Herstellungsverfahren dafür

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EP (1) EP2745717A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017025924A1 (en) * 2015-08-13 2017-02-16 Philip Morris Products S.A. Flavor capsules for smoking articles
WO2017029149A1 (en) * 2015-08-14 2017-02-23 Philip Morris Products S.A. A blister capsule, and container, for an aerosol-generating system
CN109567261A (zh) * 2018-11-27 2019-04-05 江苏万腾新材料科技有限公司 以水溶性材料为芯材的三层烟用胶囊及其制备方法
CN112931932A (zh) * 2021-02-07 2021-06-11 福建中烟工业有限责任公司 一种降温球体及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614851A (en) * 1968-04-19 1971-10-26 Brown & Williamson Tobacco Method of encapsulating liquid
US3693369A (en) * 1969-03-24 1972-09-26 Brown & Williamson Tobacco Packaging of liquids
EP0649607A2 (de) * 1993-09-30 1995-04-26 British-American Tobacco Company Limited Verbesserte Tabakrauchfilter
EP1906775B1 (de) 2005-06-21 2009-08-19 V. Mane Fils Rauchvorrichtung mit einer brechbaren kapsel, brechbare kapsel und verfahren zur herstellung besagter kapsel
WO2011077141A1 (en) * 2009-12-21 2011-06-30 British American Tobacco (Investments) Limited Enhancing the disintegration and/or degradation of a smoking article

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614851A (en) * 1968-04-19 1971-10-26 Brown & Williamson Tobacco Method of encapsulating liquid
US3693369A (en) * 1969-03-24 1972-09-26 Brown & Williamson Tobacco Packaging of liquids
EP0649607A2 (de) * 1993-09-30 1995-04-26 British-American Tobacco Company Limited Verbesserte Tabakrauchfilter
EP1906775B1 (de) 2005-06-21 2009-08-19 V. Mane Fils Rauchvorrichtung mit einer brechbaren kapsel, brechbare kapsel und verfahren zur herstellung besagter kapsel
WO2011077141A1 (en) * 2009-12-21 2011-06-30 British American Tobacco (Investments) Limited Enhancing the disintegration and/or degradation of a smoking article

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017025924A1 (en) * 2015-08-13 2017-02-16 Philip Morris Products S.A. Flavor capsules for smoking articles
CN107846971A (zh) * 2015-08-13 2018-03-27 菲利普莫里斯生产公司 用于吸烟制品的调味剂胶囊
US11147307B2 (en) 2015-08-13 2021-10-19 Philip Morris Products S.A. Flavor capsules for smoking articles
WO2017029149A1 (en) * 2015-08-14 2017-02-23 Philip Morris Products S.A. A blister capsule, and container, for an aerosol-generating system
RU2706924C2 (ru) * 2015-08-14 2019-11-21 Филип Моррис Продактс С.А. Капсула в блистере и контейнер для системы, генерирующей аэрозоль
US11363833B2 (en) 2015-08-14 2022-06-21 Philip Morris Products S.A. Blister capsule, and container, for an aerosol-generating system
CN109567261A (zh) * 2018-11-27 2019-04-05 江苏万腾新材料科技有限公司 以水溶性材料为芯材的三层烟用胶囊及其制备方法
CN112931932A (zh) * 2021-02-07 2021-06-11 福建中烟工业有限责任公司 一种降温球体及其制备方法

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