EP1489927B1 - Method for manufacturing a top loaded cigarette filler - Google Patents

Method for manufacturing a top loaded cigarette filler Download PDF

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Publication number
EP1489927B1
EP1489927B1 EP03745478.2A EP03745478A EP1489927B1 EP 1489927 B1 EP1489927 B1 EP 1489927B1 EP 03745478 A EP03745478 A EP 03745478A EP 1489927 B1 EP1489927 B1 EP 1489927B1
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EP
European Patent Office
Prior art keywords
tobacco
base layer
fraction
cellulose fibres
slurry
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.)
Expired - Lifetime
Application number
EP03745478.2A
Other languages
German (de)
French (fr)
Other versions
EP1489927A1 (en
Inventor
Steven Dirk Wijers
Josephus Alexander Petrus Franciscus Van Tuyn
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.)
BV Deli-Htl Tabak Mij
Original Assignee
BV Deli-Htl Tabak Mij
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Filing date
Publication date
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Publication of EP1489927A1 publication Critical patent/EP1489927A1/en
Application granted granted Critical
Publication of EP1489927B1 publication Critical patent/EP1489927B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
    • 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
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
    • A24B15/14—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco made of tobacco and a binding agent not derived from tobacco

Definitions

  • This invention relates to a method for manufacturing a tobacco sheet with a top layer of tobacco powder, also referred to as top loaded cigarette filler, wherein a base layer on a basis of a fine fraction of tobacco and cellulose fibres is composed, which base layer is provided on one side with a fraction of coarse tobacco, subsequently the total is submitted to a drying treatment.
  • This invention further relates to a top loaded cigarette filler constituted of a base layer of a fraction of fine tobacco and cellulose fibres and a top load of a fraction of course tobacco.
  • the base layer is obtained from a aqueous slurry with a high solid content, which aqueous slurry contains a fortification agent composed of unrefined short cellulose fibres with an average length of less than 2.0 mm.
  • a unrefined short fibre pulp has a lower apparent viscosity than the commonly known soft wood pulp of the same fibre length allowing the use of the unrefined short fibre formulation at a higher solid content. This results in a need to evaporate less water and accordingly the process can be carried out more economically.
  • the fibres applied in such a method have an average length of less than about 2 mm, preferably varying from 0.5 to about 1.5 mm and a width of 5 to 30 ⁇ m, and they are commonly obtained from essentialy hardwood species, like oak timber and poplar timber.
  • the application of such wood cellulose fibres is mainly intended to improve the tensile or tear properties of the base layer.
  • a drawback of the method described above is that the base layer ultimately used in smoking products contains cellulose having no tobacco origin. This drawback could be overcome by e.g. the use of large amounts of high quality binder during the preparation of the base layer.
  • a disadvantage of such a messure is that the end product will contain a lower tobacco content and will furthermore lead to a deteriorated taste. Both effects are undesired.
  • the application of large amounts of high quality binder results in the increase of the price of the final product, which is also commercially undesired.
  • a method for manufacturing a tobacco sheet is known from the German Offenlegungsschrift 19949983 , wherein a aqueous slurry of tobacco stems is obtained by grinding uncooked stems in presence of guar as binder. Furthermore, a solution of particular chemicals is prepared, being guar as binder, humidifier, e.g. glycerol, preservative, e.g. sodium benzoate, additives, e.g. sugar syrup, said chemical solution being first mixed with tobacco powder en then the solution containing tobacco powder is admixed with the aqueous stem slurry. The resulting mixture is spread on a conveyer via a continuous process and dried to a sheet.
  • humidifier e.g. glycerol
  • preservative e.g. sodium benzoate
  • additives e.g. sugar syrup
  • GB 1 203 939 relates to a process of manufacturing a coherent tobacco product wherein a refined pulp of cellulosic fibers is combined with comminuted tobacco and a water-insoluble cellulose derivative.
  • the first object of this invention is to provide a method for manufacturing a base layer wherein substantially no cellulose not originated from tobacco is incorporated.
  • a second object of this invention is to provide a base layer wherein no large amounts of high quality binders are incorporated and in which the strength of the base layer is maintained and no deteriorated taste results.
  • the method according to the present invention comprises the steps as disclosed in claim 1.
  • a base layer which has a small amount of cellulose not originated from tobacco.
  • Such percentages of cellulose originating from tobacco provide a base layer which satisfies the desired mechanical properties and in which, in addition, the intended tobacco flavour is maintained.
  • large amounts of binders and additives, as used in German Offenlegungsschrift 19949983 can be omitted. It should however be understood that in particular embodiments a certain amount of cellulose fibres from another origin can be used but that the largest part of the cellulose fibres are obtained from tobacco.
  • the composing of the base layer comprises the steps:
  • the tobacco fibres are obtained from fibre containing plant parts of the tobacco plant, especially from the middle veins of tobacco leaves which are released as residual material in the processing of tobacco leaves. Such middle veins are also called tobacco stems.
  • a part of the natural binders e.g. pectin and hemicellulose, goes into solution and the tobacco fibres are rendered lying free.
  • step iii) the slurry subjected to a cooking treatment is admixed with a fraction of fine tobacco and then the thus resulting mixture is dosed on a drying conveyor which is essentially a endless band of steel and subsequently passes through a drying furnace whereby the top load being the fraction of coarse tobacco is spread over the base layer in a regular layer for obtaining the desired end product.
  • a step preceeding step ii) the tobacco leaves veins are crushed and humidified, which decreases the size of the tobacco leaf veins and which promotes the formation of the tobacco leaf veins into a slurry.
  • the cooking treatment according to step ii) is especially carried out under high pressure, particularly at a temperature in the range of 120-200 °C, especially at a temperature of about 150 °C.
  • the dry content of the slurry according to step ii) is especially between 4 and 12 %, preferably between 6 and 10 %.
  • one or more additives selected from the group of plasticizers, binders, diluting agent, fragrances, flavours, preservatives and pH-buffer agents are added to the slurry as obtained in step ii).
  • the slurry as obtained in step ii) after the cooking treatment is subjected to a grinding treatment.
  • a grinding treatment By thus grinding the cellulose fibres in a refiner under wet conditions the fibres are reduced and fibrils are formed on the fibres. Such fibrils insure the cellulose fibres to entangle whereby the desired fortifying performance is optimally imparted.
  • the cellulose fibre content in the slurry as obtained from step ii) is at least 15 %, calculated on dry material.
  • a combination of tobacco material can be mentioned.
  • Such residual materials are preferably choosen from the group of middle veins of tobacco leaves, tobacco stems, veins with parts of tobacco leaves, tobacco leaf parts and fine dust.
  • the middle veins of tobacco leaves are removed from the leaf in stripperies of tobacco companies to obtain the pure tobacco leaf. This material is often referred to as "tobacco stems".
  • tobacco stems The thus stripped tobaccos are cut in a additional treatment wherein small veins with parts of tobacco leaves are formed which are however not suitable for a direct incorporation into the cigarette.
  • Such small veins with parts of tobacco leaves are gravimetrically separated. Furthermore during the overall production process of cigarettes an amount of fine dust is formed, which material is therefore not suitable for direct incorporation into the cigarettes but is suitable however to be used in the present method.
  • the residual materials described above are grinded and screened into two separate fractions being a fine fraction and a coarse fraction whereby the fine fraction is admixed with a slurry of cellulose fibres obtained from tobacco, especially tobacco leaves veins, and dosed on a drying conveyor, additionally provided with a top load of the fraction of course tobacco and subsequently dried for obtaining the desired end product.
  • the present invention further relates to a top loaded cigarette filler constituted of a base layer of a fraction of fine tobacco and cellulose fibres and a top load of a fraction of coarse tobacco obtained according the method according to the present invention wherein, the cellulose fibres in the base layer are for at least 50 %, preferably at least 75%, especially at least 90 %, originated from tobacco, especially tobacco leaf veins wherein the cellulose fibres are obtained by a slurry method, especially as described above.
  • the essence of the present invention is the preparation of a base layer wherein substantially no cellulose not originating from tobacco is incorporated as is commonly used according to the prior art.
  • the present invention especially ensures that in the base layer cellulose fibres originating from tobacco, especially from tobacco leaf veins, are used whereby a base layer is thus obtained which comprises a fine fraction of tobacco and cellulose fibres originating from tobacco.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Tobacco Products (AREA)

Description

  • This invention relates to a method for manufacturing a tobacco sheet with a top layer of tobacco powder, also referred to as top loaded cigarette filler, wherein a base layer on a basis of a fine fraction of tobacco and cellulose fibres is composed, which base layer is provided on one side with a fraction of coarse tobacco, subsequently the total is submitted to a drying treatment. This invention further relates to a top loaded cigarette filler constituted of a base layer of a fraction of fine tobacco and cellulose fibres and a top load of a fraction of course tobacco.
  • The method as referred to in the preamble concerning the manufacturing of the base layer is known from U.S. patent 4,306,578 . According to the method known therefrom the base layer is obtained from a aqueous slurry with a high solid content, which aqueous slurry contains a fortification agent composed of unrefined short cellulose fibres with an average length of less than 2.0 mm. Such a unrefined short fibre pulp has a lower apparent viscosity than the commonly known soft wood pulp of the same fibre length allowing the use of the unrefined short fibre formulation at a higher solid content. This results in a need to evaporate less water and accordingly the process can be carried out more economically. The fibres applied in such a method have an average length of less than about 2 mm, preferably varying from 0.5 to about 1.5 mm and a width of 5 to 30 µm, and they are commonly obtained from essentialy hardwood species, like oak timber and poplar timber. The application of such wood cellulose fibres is mainly intended to improve the tensile or tear properties of the base layer.
  • A drawback of the method described above is that the base layer ultimately used in smoking products contains cellulose having no tobacco origin. This drawback could be overcome by e.g. the use of large amounts of high quality binder during the preparation of the base layer. A disadvantage of such a messure is that the end product will contain a lower tobacco content and will furthermore lead to a deteriorated taste. Both effects are undesired. In addition the application of large amounts of high quality binder results in the increase of the price of the final product, which is also commercially undesired.
  • A method for manufacturing a tobacco sheet is known from the German Offenlegungsschrift 19949983 , wherein a aqueous slurry of tobacco stems is obtained by grinding uncooked stems in presence of guar as binder. Furthermore, a solution of particular chemicals is prepared, being guar as binder, humidifier, e.g. glycerol, preservative, e.g. sodium benzoate, additives, e.g. sugar syrup, said chemical solution being first mixed with tobacco powder en then the solution containing tobacco powder is admixed with the aqueous stem slurry. The resulting mixture is spread on a conveyer via a continuous process and dried to a sheet.
  • GB 1 203 939 relates to a process of manufacturing a coherent tobacco product wherein a refined pulp of cellulosic fibers is combined with comminuted tobacco and a water-insoluble cellulose derivative.
  • The first object of this invention is to provide a method for manufacturing a base layer wherein substantially no cellulose not originated from tobacco is incorporated.
  • A second object of this invention is to provide a base layer wherein no large amounts of high quality binders are incorporated and in which the strength of the base layer is maintained and no deteriorated taste results.
  • The method according to the present invention comprises the steps as disclosed in claim 1.
  • By the use in the present base layer of cellulose fibres originated for at least 50% from tobacco a base layer is thus obtained which has a small amount of cellulose not originated from tobacco. In a particular embodiment it is preferred that for composing the base layer from a fine fraction of tobacco at least 70%, especially at least 90%, of cellulose fibres originating from tobacco is used. Such percentages of cellulose originating from tobacco provide a base layer which satisfies the desired mechanical properties and in which, in addition, the intended tobacco flavour is maintained. Furthermore large amounts of binders and additives, as used in German Offenlegungsschrift 19949983 , can be omitted. It should however be understood that in particular embodiments a certain amount of cellulose fibres from another origin can be used but that the largest part of the cellulose fibres are obtained from tobacco.
  • It is particularly preferred that the composing of the base layer comprises the steps:
    1. i) providing a fine fraction of tobacco,
    2. ii) subjecting tobacco leaf veins to a cooking treatment for forming a slurry of cellulose fibres obtained from tobacco,
    3. iii) combining and mixing the slurry from step ii) with the fine fraction of tobacco from step i), and
    4. iv) dosing the mixture from step iii) on a drying conveyor for forming the base layer.
  • The tobacco fibres are obtained from fibre containing plant parts of the tobacco plant, especially from the middle veins of tobacco leaves which are released as residual material in the processing of tobacco leaves. Such middle veins are also called tobacco stems. By means of the cooking treatment used in step ii) a part of the natural binders, e.g. pectin and hemicellulose, goes into solution and the tobacco fibres are rendered lying free. Subsequently in step iii) the slurry subjected to a cooking treatment is admixed with a fraction of fine tobacco and then the thus resulting mixture is dosed on a drying conveyor which is essentially a endless band of steel and subsequently passes through a drying furnace whereby the top load being the fraction of coarse tobacco is spread over the base layer in a regular layer for obtaining the desired end product.
  • In the present method it is preferred that in a step preceeding step ii) the tobacco leaves veins are crushed and humidified, which decreases the size of the tobacco leaf veins and which promotes the formation of the tobacco leaf veins into a slurry.
  • The cooking treatment according to step ii) is especially carried out under high pressure, particularly at a temperature in the range of 120-200 °C, especially at a temperature of about 150 °C.
  • The dry content of the slurry according to step ii) is especially between 4 and 12 %, preferably between 6 and 10 %.
  • For obtaining optimal properties for the base layer one or more additives selected from the group of plasticizers, binders, diluting agent, fragrances, flavours, preservatives and pH-buffer agents are added to the slurry as obtained in step ii).
  • For the cellulose fibres to impart a good strength to the ultimate base layer it is preferred that the slurry as obtained in step ii) after the cooking treatment is subjected to a grinding treatment. By thus grinding the cellulose fibres in a refiner under wet conditions the fibres are reduced and fibrils are formed on the fibres. Such fibrils insure the cellulose fibres to entangle whereby the desired fortifying performance is optimally imparted.
  • To obtain a sufficient strong base layer it is preferred that the cellulose fibre content in the slurry as obtained from step ii) is at least 15 %, calculated on dry material.
  • As discussed before it is preferred to maintain the amount of cellulose not originated from tobacco in the final base layer at a low level. As appropriate starting material for the present invention a combination of tobacco material can be mentioned. This are generally residual materials from the cigarette industry. Such residual materials are preferably choosen from the group of middle veins of tobacco leaves, tobacco stems, veins with parts of tobacco leaves, tobacco leaf parts and fine dust. The middle veins of tobacco leaves are removed from the leaf in stripperies of tobacco companies to obtain the pure tobacco leaf. This material is often referred to as "tobacco stems". The thus stripped tobaccos are cut in a additional treatment wherein small veins with parts of tobacco leaves are formed which are however not suitable for a direct incorporation into the cigarette. Such small veins with parts of tobacco leaves, also referred to as winnovers, are gravimetrically separated. Furthermore during the overall production process of cigarettes an amount of fine dust is formed, which material is therefore not suitable for direct incorporation into the cigarettes but is suitable however to be used in the present method. The residual materials described above are grinded and screened into two separate fractions being a fine fraction and a coarse fraction whereby the fine fraction is admixed with a slurry of cellulose fibres obtained from tobacco, especially tobacco leaves veins, and dosed on a drying conveyor, additionally provided with a top load of the fraction of course tobacco and subsequently dried for obtaining the desired end product.
  • The present invention further relates to a top loaded cigarette filler constituted of a base layer of a fraction of fine tobacco and cellulose fibres and a top load of a fraction of coarse tobacco obtained according the method according to the present invention wherein, the cellulose fibres in the base layer are for at least 50 %, preferably at least 75%, especially at least 90 %, originated from tobacco, especially tobacco leaf veins wherein the cellulose fibres are obtained by a slurry method, especially as described above.
  • The essence of the present invention is the preparation of a base layer wherein substantially no cellulose not originating from tobacco is incorporated as is commonly used according to the prior art. The present invention especially ensures that in the base layer cellulose fibres originating from tobacco, especially from tobacco leaf veins, are used whereby a base layer is thus obtained which comprises a fine fraction of tobacco and cellulose fibres originating from tobacco.

Claims (15)

  1. A method for manufacturing a top loaded cigarette filler, the method comprising the steps of dosing a slurry composed on a basis of a fraction of fine tobacco and cellulose fibres on a drying conveyor for forming a base layer, spreading over said base layer a fraction of coarse tobacco for forming a top load on said base layer and subsequently subjecting the total to a drying treatment, wherein said cellulose fibres to be used for manufacturing said base layer are for at least 50 % of cellulose fibres originating from tobacco.
  2. A method according to claim 1, characterized in that said cellulose fibres to be used for manufacturing said base layer are for at least 70 %, especially at least 90 %, of cellulose fibres originating from tobacco.
  3. A method according to the claims 1-2, characterized in that composing the base layer comprises the steps of: i) providing a fine fraction of tobacco, ii) subjecting tobacco leaf veins to a cooking treatment for forming a slurry of cellulose fibres obtained from tobacco, m) combining and mixing the slurry from step ii) and the fine fraction of tobacco from step i), and iv) dosing the mixture from step iii) on a drying conveyer for forming of the base layer.
  4. A method according to claim 3, characterized in that the tobacco leaf veins are crushed and humidified in a step preceeding step ii).
  5. A method according to any one of the claims 3-4, characterized in that the cooking treatment according to step ii) is carried out under high pressure.
  6. A method according to any one of claims 3-5, characterized in that the cooking treatment according to step ii) is carried out at a temperature in the range of 120-200°C.
  7. A method according to any one of claims 3-6, characterized in that the dry content of the slurry according to step ii) is between 4 and 12 %, especially between 6 and 10 %.
  8. A method according to any one of the claims 3-7, characterized in that one or more additives are added to the slurry as obtained according to step ii) selected from the group of plasticizers, binders, diluting agents, fragrances, flavours, preservatives and pH-buffer agents.
  9. A method according to any one of the preceeding claims 3-8, characterized in that the slurry obtained in step ii) is subjected to a grinding treatment after the cooking treatment.
  10. A method according to any one of the preceeding claims 3-9, characterized in that the cellulose fibre content in the slurry from step ii) is at least 15 %, calculated on dry material.
  11. A method according to any of the preceeding claims, characterized in that both the fraction of coarse tobacco and the fraction of fine tobacco are originating from residual materials which are obtained by the manufacturing of smoking products.
  12. A method according to claim 11, characterized in that the residual materials are selected from the group of middle veins of tobacco leafs, tobacco stems, veins with parts tobacco leaf, tobacco leaf parts and fine dust.
  13. A top loaded cigarette filler constituted of a base layer of a fraction of fine tobacco and cellulose. fibres and a top load of a fraction of coarse tobacco obtained according to the method as described in any of the claims 1-12, wherein the cellulose fibres in the base layer are for at least 50 % originated from tobacco.
  14. A top loaded cigarette filler according to claim 13, characterized in that said cellulose fibres in the base layer are for at least 70 %, especially for at least 90 %, originated from tobacco.
  15. A top loaded cigarette filler according to claims 13-14, characterized in that said cellulose fibres originate from tobacco leaf veins.
EP03745478.2A 2002-03-29 2003-03-27 Method for manufacturing a top loaded cigarette filler Expired - Lifetime EP1489927B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1020285 2002-03-29
NL1020285A NL1020285C2 (en) 2002-03-29 2002-03-29 Method for manufacturing a 'top-loaded cigarette filler'. Method for manufacturing a 'top-loaded cigarette filler'.
PCT/NL2003/000235 WO2003082030A1 (en) 2002-03-29 2003-03-27 Method for manufacturing a top loaded cigarette filler

Publications (2)

Publication Number Publication Date
EP1489927A1 EP1489927A1 (en) 2004-12-29
EP1489927B1 true EP1489927B1 (en) 2014-04-30

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EP03745478.2A Expired - Lifetime EP1489927B1 (en) 2002-03-29 2003-03-27 Method for manufacturing a top loaded cigarette filler

Country Status (4)

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EP (1) EP1489927B1 (en)
AU (1) AU2003235404A1 (en)
NL (1) NL1020285C2 (en)
WO (1) WO2003082030A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1790240A1 (en) 2005-11-25 2007-05-30 Philip Morris Products S.A. Tobacco slab
EP2606751A1 (en) 2011-12-21 2013-06-26 Reemtsma Cigarettenfabriken GmbH Tobacco-containing article
EP2617299A1 (en) 2012-01-18 2013-07-24 Delfortgroup AG Paper filled with tobacco particles
US10750773B2 (en) 2014-06-24 2020-08-25 Philip Morris Products S.A. Reconstituted tobacco sheets and related methods
NL2014556B1 (en) 2015-03-31 2017-01-25 B V Deli-Htl Tabak Mij Method for manufacturing a film consisting of at least two layers.
NL2022211B1 (en) 2018-12-14 2020-07-03 B V Deli Htl Tabak Mij A hollow rod made from a homogenized tobacco material.
NL2023032B1 (en) 2019-04-30 2020-11-23 Htl Dht B V Apparatus to be used for heating an aerosol generating material to generate an inhalable aerosol and/or gas

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076729A (en) * 1961-05-09 1963-02-05 Gen Cigar Co Tobacco processing and resulting product

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416537A (en) * 1966-12-01 1968-12-17 Gen Cigar Co Tobacco sheet manufacture of high wet strength
CA1113231A (en) * 1978-03-17 1981-12-01 Amf Incorporated Tobacco sheet reinforced with hardwood pulp
US4681126A (en) * 1984-05-21 1987-07-21 Brown & Williamson Tobacco Corporation Process for manufacturing reconstituted tobacco
HRP940578B1 (en) * 1993-10-07 1999-10-31 Hans Noe Rod-shaped smoking article
DE4334222C3 (en) * 1993-10-07 2001-07-26 Reemtsma H F & Ph Stick-shaped smoking product
DE19602405A1 (en) * 1996-01-24 1997-07-31 Brinkmann Tabakfabriken Gmbh Wrapping film containing tobacco extract, added cellulose and additives, used for cigars or cigarillo(s)

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076729A (en) * 1961-05-09 1963-02-05 Gen Cigar Co Tobacco processing and resulting product

Also Published As

Publication number Publication date
WO2003082030A1 (en) 2003-10-09
EP1489927A1 (en) 2004-12-29
AU2003235404A1 (en) 2003-10-13
NL1020285C2 (en) 2003-09-30

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