EP2424392B1 - Treated tobacco - Google Patents

Treated tobacco Download PDF

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Publication number
EP2424392B1
EP2424392B1 EP10718273.5A EP10718273A EP2424392B1 EP 2424392 B1 EP2424392 B1 EP 2424392B1 EP 10718273 A EP10718273 A EP 10718273A EP 2424392 B1 EP2424392 B1 EP 2424392B1
Authority
EP
European Patent Office
Prior art keywords
tobacco
diluent
barrier material
treated
treated tobacco
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.)
Not-in-force
Application number
EP10718273.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2424392A1 (en
Inventor
Martin Coleman
Edward Dennis John
Dominic Woodcock
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.)
British American Tobacco Investments Ltd
Original Assignee
British American Tobacco Investments Ltd
British American Tobacco Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British American Tobacco Investments Ltd, British American Tobacco Co Ltd filed Critical British American Tobacco Investments Ltd
Priority to PL10718273T priority Critical patent/PL2424392T3/pl
Publication of EP2424392A1 publication Critical patent/EP2424392A1/en
Application granted granted Critical
Publication of EP2424392B1 publication Critical patent/EP2424392B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
    • 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
    • A24B15/186—Treatment of tobacco products or tobacco substitutes by coating with a coating composition, encapsulation of tobacco particles
    • 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

Definitions

  • the present invention relates to treated tobacco material.
  • the present invention relates to tobacco that carries diluent and barrier material, products comprising the same and a method of producing the same.
  • Diluents are compounds that are vapourised during smoking and transfer to the mainstream smoke in aerosol form. They are generally selected such that they transfer to the smoke substantially intact. Other components of the smoke (tobacco-derived components in the case of tobacco-containing smoking articles) are therefore "diluted" by this means.
  • a cigarette can comprise a filter at the mouth end, a tobacco rod comprising smokable filler material, and cigarette paper wrapped around the rod.
  • diluent When diluent is present in the smokable filler material, this may be as a simple mixture with the other ingredients (particularly for diluents in solid form), or the diluent may be carried on one or more of the other ingredients (particularly if the diluent is in liquid form). If incorporated into the filler material as a simple mixture, this may present disadvantages during manufacturing, and the diluent may be easily dislodged from the finished product, especially if it is in fine powder form. Accordingly, it is preferred for the diluent to be held in intimate contact with another ingredient of the filler material.
  • diluent it is known for the diluent to be provided in intimate contact with the tobacco itself.
  • WO 2007/012980 and US 2006/283469 describe a tobacco-containing composition comprising added diluents, which may be administered by spraying, admixing or soaking of the tobacco.
  • vapourisation of the diluent at lower temperatures can cause problems during storage of the cigarettes. Specifically, the diluent can migrate during storage and subsequently be lost to the atmosphere or interact with other parts of the product such as the cigarette paper. This may also lead to staining or marking of the cigarette paper, either by the diluent itself or by compounds released from the diluent interaction.
  • the tobacco used in the invention may be, for example, stem, lamina, dust, reconstituted tobacco or a mixture thereof.
  • Suitable tobacco materials include the following tobacco types: Virginia or flue-cured tobacco, Burley tobacco, Oriental tobacco, or a blend of tobacco materials.
  • the tobacco may be expanded, such as dry ice expanded tobacco (DIET), or processed by any other means such as extrusion.
  • DIET dry ice expanded tobacco
  • the stem tobacco may be pre-processed or unprocessed, and may be, for instance, solid stems, shredded dried stems or steam treated stems.
  • the diluent is at least one aerosol forming agent which may be, for instance, a polyol aerosol generator or a non-polyol aerosol generator, preferably a non-polyol aerosol generator. It may be a solid or liquid at room temperature, but preferably is a liquid at room temperature.
  • Suitable polyols include sorbitol, glycerol, and glycols like propylene glycol or triethylene glycol.
  • Suitable non-polyols include monohydric alcohols, high boiling point hydrocarbons, acids such as lactic acid, and esters such as diacetin, triacetin, triethyl citrate or isopropyl myristate.
  • a combination of diluents may be used, in equal or differing proportions. Triacetin, triethyl citrate and isopropyl myristate are particularly preferred.
  • diluent to the tobacco is by any suitable method known to the skilled person, including washing, soaking, spraying or admixture.
  • the diluent may reside as a surface covering on the tobacco material, and/or at least some may be absorbed into the material. In the present invention, however, it is not essential for the diluent to be in any precise location on the tobacco.
  • diluents There may be several factors influencing the stability and migration of diluents under ambient conditions. These factors may include hydrophobicity or hydrophilicity, viscosity, saturated vapour pressure at room temperature, boiling point, molecular structure (such as hydrogen bonding or Van der Waals forces) and the absorptive/adsorptive interaction between diluent and the tobacco. Some diluents will suffer from migration problems to a greater extent than others; for instance, it has been found that triacetin, isopropyl myristate and triethyl citrate particularly benefit from immobilisation as in the present invention.
  • Another relevant factor is the loading level of the diluent. For instance, if a diluent such as glycerol is included in a large amount, migration problems can still be significant.
  • the diluent loading level in the present invention may depend upon the specific diluent.
  • the treated tobacco of the invention carries at least 0.05 g diluent per g tobacco, more preferably at least 0.1 g diluent per g tobacco, more preferably at least 0.2 g diluent per g tobacco.
  • it preferably contains at least 5 % by weight diluent, preferably at least 10 %, 15 %, 20 % or 50%.
  • the barrier material is capable of inhibiting migration of the diluent during storage of the smoking article but allows release of the diluent during smoking of the smoking article. It may be one that melts, decomposes, reacts, degrades, swells or deforms to release the diluent at a temperature above room temperature but at or below the temperature reached inside a smoking article during smoking. For instance, the physical expansion occurring with vapourisation of sufficient levels of diluent may break down the structure of the barrier material. In embodiments of the invention, the barrier material releases substantial amounts of the diluent above 50 °C, preferably above 60 °C, 70 °C, 80 °C or 90 °C.
  • the barrier material may be, for example, a polysaccharide or cellulosic barrier material, a gelatin, a gum, a gel or a mixture thereof.
  • Suitable polysaccharides include an alginate, dextran, maltodextrin, cyclodextrin and pectin.
  • Suitable cellulosic materials include methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, and cellulose ethers.
  • Suitable gums include gum Arabic, gum ghatti, gum tragacanth, Karaya, locust bean, acacia, guar, quince seed and xanthan gums.
  • Suitable gels include agar, agarose, carrageenans, furoidan and furcellaran.
  • the barrier material comprises a polysaccharide.
  • An alginate is especially preferred, due to its encapsulation properties.
  • the alginate may be, for instance, a salt of alginic acid, an esterified alginate or glyceryl alginate.
  • Salts of alginic acid include ammonium alginate, triethanolamine alginate, and group I or II metal ion alginates like sodium, potassium, calcium and magnesium alginate.
  • Esterified alginates include propylene glycol alginate and glyceryl alginate.
  • the barrier material is sodium alginate and/or calcium alginate.
  • Calcium alginate provides a greater inhibition of migration of the diluent at ambient temperature than sodium alginate, but also may release the diluent at a higher temperature than the latter.
  • the diluent is applied to the tobacco prior to or simultaneously with the barrier material.
  • the diluent is in intimate contact with the tobacco.
  • Application of the barrier material is by any suitable method known to the skilled person or described herein, which does not cause complete loss of the diluent in the process.
  • substantially no diluent is lost due to the step of applying the barrier material.
  • the method of the invention involves spraying of the barrier material or a precursor thereto.
  • the tobacco can be sprayed with an aqueous sodium alginate solution and dried to form a water-soluble film on the surface.
  • Calcium ions from the tobacco itself can at least partially gel the sodium alginate to calcium alginate.
  • Calcium ions can be added to the tobacco prior to alginate treatment to enhance this effect.
  • the tobacco can be sprayed with sodium alginate and then treated with a source of calcium ions to form a water-insoluble film or gel covering of calcium alginate.
  • the diluent is surrounded by the barrier material and its migration is hindered under ambient conditions.
  • FIG 1 A schematic illustration of a treated tobacco particle found in one embodiment of the invention is given in Figure 1 .
  • the treated tobacco particle (1) is a tobacco particle (2) containing diluent (3) in a first coating and optionally also in its cellular structure. "Pores" (5) or air gaps between the tobacco fibres are shown; whilst diluent (3) is shown coating a pore, it may completely fill the pore.
  • the barrier material (4) forms an external coating around the tobacco particle.
  • the boundary between the barrier material layer and the diluent layer may not necessarily be a sharp one, but the barrier material will be substantially found external to the diluent.
  • FIG. 2 Another treated tobacco particle (10) of the invention is shown in Figure 2 , in which the barrier material and diluent have been applied to the tobacco together and reside inside the cellular structure and/or as a coating layer (31) on the surface of the particle.
  • a further coating of barrier material (4) is then applied to provide an additional barrier to migration.
  • the invention excludes treated tobacco in which the diluent has been pre-encapsulated with the barrier material before application to the tobacco.
  • tobacco particle (100) in Figure 3 in which the diluent (3) has been pre-encapsulated with the barrier material (4) before application to the tobacco (2), and so is not in intimate contact with the tobacco.
  • the treated tobacco contains as much barrier material as is required to perform its function. This will be dependent upon the type of tobacco used. For example, when shredded dried stem is used, the treated tobacco may contain 1 - 10 % by weight of the barrier material, optionally 3 - 8 % by weight, optionally 4 - 6 % by weight. As will be appreciated by those skilled in the art, the amount of barrier material by weight of expanded tobacco will be greater than with, for instance, shredded dried stem.
  • the treated tobacco can be incorporated into a smoking article by conventional means. It may be the sole tobacco used in the smoking article or may be combined or blended with other tobacco materials.
  • the term "smoking article” includes smokeable products such as cigarettes, cigars and cigarillos. The term also includes so-called "heat-not-burn” products, which produce smoke or a smoke-like aerosol.
  • the smoking article may be provided with a filter for the particulate and gaseous flow drawn by the smoker.
  • the smoking article is a cigarette.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
EP10718273.5A 2009-04-29 2010-04-28 Treated tobacco Not-in-force EP2424392B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10718273T PL2424392T3 (pl) 2009-04-29 2010-04-28 Tytoń przetworzony

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0907360A GB2469838A (en) 2009-04-29 2009-04-29 Treated tobacco
PCT/GB2010/050692 WO2010125387A1 (en) 2009-04-29 2010-04-28 Treated tobacco

Publications (2)

Publication Number Publication Date
EP2424392A1 EP2424392A1 (en) 2012-03-07
EP2424392B1 true EP2424392B1 (en) 2013-04-17

Family

ID=40791985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10718273.5A Not-in-force EP2424392B1 (en) 2009-04-29 2010-04-28 Treated tobacco

Country Status (18)

Country Link
US (1) US20120160253A1 (ru)
EP (1) EP2424392B1 (ru)
JP (1) JP2012525138A (ru)
KR (1) KR20120009500A (ru)
CN (1) CN102413722A (ru)
AR (1) AR078038A1 (ru)
BR (1) BRPI1014296A2 (ru)
CA (1) CA2758861A1 (ru)
CL (1) CL2011002669A1 (ru)
ES (1) ES2417029T3 (ru)
GB (1) GB2469838A (ru)
MX (1) MX2011011315A (ru)
NZ (1) NZ595408A (ru)
PL (1) PL2424392T3 (ru)
RU (1) RU2011148248A (ru)
UA (1) UA103922C2 (ru)
WO (1) WO2010125387A1 (ru)
ZA (1) ZA201107447B (ru)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10772355B2 (en) 2016-07-29 2020-09-15 Altria Client Services Llc Aerosol-generating system including a heated gel container
US10791760B2 (en) 2016-07-29 2020-10-06 Altria Client Services Llc Aerosol-generating system including a cartridge containing a gel
US11291248B2 (en) 2016-07-29 2022-04-05 Altria Client Services Llc Aerosol-generating system including a cartridge containing a gel and a device for heating the cartridge

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GB201012090D0 (en) * 2010-07-19 2010-09-01 British American Tobacco Co Cellulosic material
CN103369980B (zh) * 2011-03-29 2016-04-06 日本烟草产业株式会社 非燃烧吸引型烟制品
KR101644725B1 (ko) * 2011-10-31 2016-08-01 필립모리스 프로덕츠 에스.에이. 흡연물품용 처리 디바이스 및 그것을 위한 카트리지
CN105578906B (zh) 2013-10-14 2019-05-21 菲利普莫里斯生产公司 包含改良条的加热式气溶胶生成制品
CN103598672A (zh) * 2013-11-28 2014-02-26 刘秋明 一种电子烟烟液溶剂及电子烟烟液
BR112017014790A2 (pt) 2015-01-07 2018-01-09 British American Tobacco Investments Ltd material fumável para inclusão em um artigo de fumar, método para obter material fumável, artigo de fumar e uso de uma solução de goma de acácia
WO2018002926A1 (en) * 2016-06-28 2018-01-04 Seach Sarid Ltd. A dosage form for vaporization and smoking
GB201716708D0 (en) * 2017-10-12 2017-11-29 British American Tobacco Investments Ltd Aerosolisable product
KR102330285B1 (ko) * 2018-06-19 2021-11-24 주식회사 케이티앤지 에어로졸 생성 구조체 및 에어로졸 생성 구조체의 제조 방법
KR102330287B1 (ko) * 2018-06-19 2021-11-24 주식회사 케이티앤지 에어로졸 생성 물품 및 에어로졸 생성 물품의 제조 방법
EP3902415B1 (en) * 2018-12-28 2023-08-30 Philip Morris Products S.A. High viscosity nicotine formulation
WO2022070755A1 (ja) * 2020-10-02 2022-04-07 Ｆｕｔｕｒｅ Ｔｅｃｈｎｏｌｏｇｙ株式会社 芳香カートリッジ

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10772355B2 (en) 2016-07-29 2020-09-15 Altria Client Services Llc Aerosol-generating system including a heated gel container
US10791760B2 (en) 2016-07-29 2020-10-06 Altria Client Services Llc Aerosol-generating system including a cartridge containing a gel
US11291248B2 (en) 2016-07-29 2022-04-05 Altria Client Services Llc Aerosol-generating system including a cartridge containing a gel and a device for heating the cartridge
US11792894B2 (en) 2016-07-29 2023-10-17 Altria Client Services Llc Aerosol-generating system including a cartridge containing a gel
US11839706B2 (en) 2016-07-29 2023-12-12 Altria Client Services Llc Aerosol-generating system including a heated gel container

Also Published As

Publication number Publication date
UA103922C2 (ru) 2013-12-10
ES2417029T3 (es) 2013-08-05
US20120160253A1 (en) 2012-06-28
EP2424392A1 (en) 2012-03-07
NZ595408A (en) 2013-05-31
JP2012525138A (ja) 2012-10-22
GB0907360D0 (en) 2009-06-10
CN102413722A (zh) 2012-04-11
PL2424392T3 (pl) 2013-09-30
GB2469838A (en) 2010-11-03
AU2010243338A1 (en) 2011-10-27
ZA201107447B (en) 2014-03-26
BRPI1014296A2 (pt) 2016-04-05
WO2010125387A1 (en) 2010-11-04
CA2758861A1 (en) 2010-11-04
MX2011011315A (es) 2011-11-18
KR20120009500A (ko) 2012-01-31
CL2011002669A1 (es) 2012-05-25
RU2011148248A (ru) 2013-06-10
AR078038A1 (es) 2011-10-12

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