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US20080216854A1 - Methods of making reconstituted tobacco sheets - Google Patents

Methods of making reconstituted tobacco sheets Download PDF

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Publication number
US20080216854A1
US20080216854A1 US12/073,650 US7365008A US2008216854A1 US 20080216854 A1 US20080216854 A1 US 20080216854A1 US 7365008 A US7365008 A US 7365008A US 2008216854 A1 US2008216854 A1 US 2008216854A1
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US
United States
Prior art keywords
sheet
tobacco
glycerin
aerosol former
incorporating
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.)
Abandoned
Application number
US12/073,650
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English (en)
Inventor
Juan G. Nicholls
Richard G. Uhl
Raquel M. Olegario
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.)
Philip Morris USA Inc
Original Assignee
Philip Morris USA Inc
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 Philip Morris USA Inc filed Critical Philip Morris USA Inc
Priority to US12/073,650 priority Critical patent/US20080216854A1/en
Assigned to PHILIP MORRIS USA INC. reassignment PHILIP MORRIS USA INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NICHOLLS, JUAN G., UHL, RICHARD G., OLEGARIO, RAQUEL M.
Publication of US20080216854A1 publication Critical patent/US20080216854A1/en
Abandoned 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
    • A24B15/10—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
    • 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
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/01—Making cigarettes for simulated smoking devices

Definitions

  • tobacco by-products such as tobacco stems, leaf scraps, and tobacco dust produced during the manufacturing process (i.e., stemming, aging, blending, cutting, drying, cooling, screening, shaping and packaging) can be recycled to reclaim their useful tobacco content.
  • tobacco by-products have been formed into what is known in the industry as reconstituted tobacco sheets.
  • reconstituted tobacco sheets may be cut in a similar fashion as whole leaf tobacco to produce tobacco filler suitable for cigarettes and other smoking articles.
  • Reconstituted tobacco sheets, methods, and/or apparatuses for production are also described in commonly assigned U.S. Pat. No. 4,341,228 (Keritsis et al.), U.S. Pat. No. 5,724,998 (Gellatly et al.), U.S. Pat. No. 5,203,354 (Hickle), U.S. Pat. No. 5,584,306 (Beauman et al.), and U.S. Pat. No. 6,216,706 (Kumar et al.).
  • a process for manufacturing reconstituted tobacco sheets uses a paper-making machine in which water is drained from a fibrous slurry of tobacco particles, and sheet that is formed is subsequently treated and dried.
  • Such paper-making machines are described in U.S. Pat. No. 3,255,706 (Selke), U.S. Pat. No. 4,542,755 (Selke et al.) and U.S. Pat. No. 4,182,349 (Selke).
  • a method of making a reconstituted tobacco sheet comprises preparing an aqueous slurry containing tobacco material.
  • a sheet is formed from the aqueous slurry, followed by reducing a moisture content of the sheet to less than about 50% by weight.
  • An aerosol former is incorporated into the sheet at a temperature below about 40° C., followed by drying the sheet.
  • a method of making a reconstituted tobacco sheet comprises preparing an aqueous slurry containing tobacco material, wherein the tobacco material includes tobacco leaf scraps, tobacco stems, tobacco dust created during tobacco processing, and/or tobacco leaf prime lamina strip.
  • the aqueous slurry is separated into a solubles portion and a fibrous portion.
  • the sheet is formed by a paper-making process from the fibrous portion separated from the aqueous slurry, without incorporating the solubles portion, followed by reducing a moisture content of the sheet to between about 30% and about 50% by weight.
  • An aerosol former comprising a glycerin solution is incorporated into the sheet at a temperature between ambient temperature and below about 40° C.
  • the sheet is dried to provide a reconstituted tobacco sheet having a glycerin content of up to about 50% by weight of the reconstituted tobacco sheet.
  • FIG. 1 is a flow chart illustrating an exemplary embodiment of a method of making reconstituted tobacco sheet.
  • FIG. 2 is a flow chart illustrating a preferred embodiment of a method of making reconstituted tobacco sheet.
  • a method of forming a reconstituted tobacco sheet with a high aerosol forming content can provide the reconstituted sheets with up to about 50% by weight glycerin, while avoiding a tacky surface on the sheet.
  • FIG. 1 shows an exemplary embodiment of a method of making a reconstituted tobacco sheet.
  • step 10 an aqueous slurry containing tobacco materials is prepared.
  • step 20 a tobacco sheet is formed from the aqueous slurry.
  • the moisture content of the aqueous slurry is reduced to under 50% by weight in step 30 .
  • step 40 an aerosol former is incorporated into the tobacco sheet at a temperature of preferably less than about 40° C.
  • step 50 the tobacco sheet undergoes a drying process.
  • FIG. 2 shows a preferred embodiment of the method of making the reconstituted tobacco sheet.
  • tobacco materials 52 and water 54 are mixed to form an aqueous slurry 56 .
  • the tobacco materials 52 can be tobacco leaf scraps, tobacco stems, tobacco dust created during tobacco processing, and/or tobacco leaf prime lamina strip.
  • the tobacco material 52 can contain at least about 50% by weight stems, preferably about 70-80% by weight stems, with the balance containing tobacco leaf scraps and/or tobacco dust.
  • Tobacco materials 52 can include other additives, such as wood cellulose fibers to improve the strength of the reconstituted tobacco sheet and allowing for lower stem content.
  • aqueous slurry 56 is subjected to a pulping process 58 to produce a solubles portion 60 and a fibrous portion 62 .
  • aqueous slurry 56 can be compressed or centrifuged to remove the solubles portion 60 .
  • the solubles portion 60 is not reincorporated into the reconstituted tobacco manufacturing process, but discarded.
  • the fibrous portion 62 is subjected to a refining process 64 to convert the fibrous portion 62 to more closely approximate individual fibers for paper-making.
  • the fibrous portion 62 is formed into tobacco sheets by a paper-making process 66 (e.g., Fourdrinier machine).
  • a paper-making process 66 e.g., Fourdrinier machine.
  • the moisture content of the sheet is reduced by draining excess water through a wire mesh (e.g., Fourdrinier wire).
  • the moisture content can be reduced from a starting moisture content of about 98-99% by weight to about 95% by weight by pure draining.
  • the moisture content can be reduced to about 85% if draining is coupled with vacuuming of moisture.
  • the tobacco sheets are subjected to a moisture reduction process 68 to reduce the moisture content of the sheet.
  • the moisture content is reduced to less than 50% by weight, but greater than 30% by weight.
  • the moisture content is reduced to less than 45% by weight, less than 40% by weight, or less than 35% by weight.
  • the sheets can be placed on a steam-heated metal drum (i.e., Yankee dryer) to reduce the moisture content and optionally followed by smaller steam-heated surface dryers (i.e. can dryers).
  • an aerosol former solution 72 is applied to the sheet.
  • the sheets can be passed through a size press 70 , in which the sheets are fed between two vertical or horizontal rollers, configured to apply an aerosol former solution 72 to both sides of the sheet.
  • the aerosol former solution 72 can include other additives 74 .
  • the aerosol former solution 72 can be sprayed onto the sheet, or the sheet could be immersed in the aerosol former solution 72 .
  • aerosol formers examples include glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and/or oleyl alcohol.
  • an aerosol former solution 72 is incorporated into the sheet at a temperature below about 40° C. In other exemplary embodiments, the aerosol former solution 72 is incorporated into the sheet at temperatures below about 35° C., e.g., below about 30° C. or 25° C., or at ambient temperature.
  • Glycerin is a preferred aerosol former for aerosol former solution 72 .
  • Glycerin forms an inert aerosol of glycerin and water vapor when combusted in a smoking article.
  • the glycerin aerosol former can be incorporated into the sheet as an aqueous glycerin solution containing about 20% to 80% glycerin by volume.
  • the glycerin solution can contain about 50 to 80% glycerin by volume.
  • the aqueous glycerin solution contains between about 75% to about 80% by volume glycerin. Attempts to use a solution of about 100% glycerin results in poor absorption of the glycerin into the tobacco material, resulting in a tacky surface, which can present difficulties in the manufacturing process.
  • the aerosol former solution 72 an also contain other additives 74 , such as flavorants, humectants (other than glycerin), and/or acetate compounds.
  • flavorants include licorice, sugar, isosweet, cocoa, lavender, cinnamon, cardamom, apium graveolens, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oils, cassia, caraway, cognac, jasmine, chamomile, menthol, cassia, ylang-ylang, sage, spearmint, ginger, coriander, coffee and the like.
  • humectants other than glycerin include propylene glycol and the like.
  • Tobacco materials with a higher concentration of glycerin may also contain optional additives.
  • Acetates have been identified as possibly promoting reduction in TPM cytotoxicity of tobacco smoke, especially in combination with glycerin.
  • Acetate compounds may further enhance the reduction of TPM or phenolics in the smoke of a combusted smoking article.
  • the acetate compound includes ammonium acetate, calcium acetate, and/or magnesium acetate.
  • the one or more acetate compounds are added in an amount effective to promote the reduction of catechol, hydroquinone, phenol, or TSNA in the smoke of a combusted smoking article incorporating the sheet as a cut filler.
  • the sheet is exposed to a drying process 76 .
  • the drying process 76 can include passing the sheet through a tunnel or apron dryer.
  • the glycerin solution is added in an amount effective to produce a non-tacky sheet upon drying. In another embodiment, the glycerin solution is added in an amount up to 50% by weight of the tobacco sheet after drying.
  • the ammonium acetate can be incorporated into the tobacco sheet in an amount between about 5 to 20% by weight of the sheet after drying, preferably about 10 to 12%.
  • Calcium acetate can be incorporated in an amount between about 1 to 10% by weight of the sheet after drying, preferably about 4%.
  • Magnesium acetate can incorporated in an amount between about 5-20% by weight of the sheet after drying, preferably about 8 to 10%.
  • step 78 the sheet containing an aerosol former (e.g., glycerin) is thrashed or flayed with mechanical fingers into sized pieces similar to natural tobacco lamina strips or cut into diamond shaped pieces, between about two to four inches on a side.
  • the reconstituted tobacco sheet pieces are blended with natural tobacco strips and the entire blend is shredded into a cut filler and incorporated into a smoking article.
  • the overall reduction in TPM due to the dilution of tar in the tobacco smoke with an inert aerosol is proportional to the amount of glycerin incorporated in a smoking article.
  • the shredded tobacco sheet pieces may comprise approximately 5 to 60% of the blend of tobacco filler that is incorporated into the tobacco rod portion of the smoking article.
  • the elevated glycerin content may tend to spot the wrapper of the tobacco rod, especially in humid conditions.
  • the spotting effect can be ameliorated by selection of a wrapper paper having low spotting-propensity and/or by using a double wrap for the tobacco rod.
  • cigarettes made from blends containing 20-30% STSP (comprising 2 ⁇ 3 base web, 1 ⁇ 3 glycerin) demonstrated that the biological activity, Ames and cytotoxicity, of total particulate matter (TPM), is reduced compared to a control cigarette without STSP, of similar filter construction and similar firmness.
  • STSP may comprise approximately 20% to 30% of the blend filler, wherein the aformentioned reduction in biological activity can be achieved, the tendency for spotting is reduced and unfavorable impact on sensory perceptions from inclusion of the STSP is ameliorated.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Paper (AREA)
US12/073,650 2007-03-09 2008-03-07 Methods of making reconstituted tobacco sheets Abandoned US20080216854A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/073,650 US20080216854A1 (en) 2007-03-09 2008-03-07 Methods of making reconstituted tobacco sheets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90583407P 2007-03-09 2007-03-09
US12/073,650 US20080216854A1 (en) 2007-03-09 2008-03-07 Methods of making reconstituted tobacco sheets

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US (1) US20080216854A1 (ru)
EP (1) EP2134203B1 (ru)
JP (1) JP2010520764A (ru)
KR (1) KR101556023B1 (ru)
CN (1) CN101631478A (ru)
AR (1) AR065663A1 (ru)
AT (1) ATE507733T1 (ru)
AU (1) AU2008224553B2 (ru)
BR (1) BRPI0808671B1 (ru)
CO (1) CO6220923A2 (ru)
DE (1) DE602008006703D1 (ru)
DK (1) DK2134203T3 (ru)
EA (1) EA015099B1 (ru)
ES (1) ES2366073T3 (ru)
MX (1) MX2009009640A (ru)
MY (1) MY147094A (ru)
NZ (1) NZ579393A (ru)
PL (1) PL2134203T3 (ru)
PT (1) PT2134203E (ru)
SI (1) SI2134203T1 (ru)
TW (1) TWI532442B (ru)
UA (1) UA96017C2 (ru)
WO (1) WO2008110932A2 (ru)

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WO2012164009A3 (en) * 2011-05-31 2013-03-21 Philip Morris Products S.A. Rods for use in smoking articles
EP2617299A1 (de) * 2012-01-18 2013-07-24 Delfortgroup AG Mit Tabakpartikeln gefülltes Papier
EP3075266A1 (en) * 2015-04-02 2016-10-05 PT. Gudang Garam Tbk. Method of producing an aerosol-generating article containing reconstituted tobacco material, an aerosol-generating article containing reconstituted tobacco material and use of an aerosol-generating article containing reconstituted tobacco material
WO2017025367A1 (de) * 2015-08-12 2017-02-16 Hauni Maschinenbau Gmbh Verfahren zum bereitstellen von kleinteiligem tabakgut und einrichtung der tabak verarbeitenden industrie
WO2017097840A1 (en) * 2015-12-08 2017-06-15 British American Tobacco (Investments) Limited Tobacco composition
CN106978768A (zh) * 2017-03-09 2017-07-25 广东中烟工业有限责任公司 茉莉花在制备卷烟纸中的应用以及卷烟纸与制备方法
US20180242631A1 (en) * 2015-09-08 2018-08-30 Philip Morris Products S.A. Method of producing high tensile strength homogenized tobacco material
WO2020002585A1 (en) * 2018-06-29 2020-01-02 Nerudia Limited A method for manufacturing reconstituted plant material
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