EP2179666B1 - Rauchlose Tabakzusammensetzungen und Verfahren zur Behandlung von Tabak zu dessen Verwendung darin - Google Patents

Rauchlose Tabakzusammensetzungen und Verfahren zur Behandlung von Tabak zu dessen Verwendung darin Download PDF

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Publication number
EP2179666B1
EP2179666B1 EP10152287A EP10152287A EP2179666B1 EP 2179666 B1 EP2179666 B1 EP 2179666B1 EP 10152287 A EP10152287 A EP 10152287A EP 10152287 A EP10152287 A EP 10152287A EP 2179666 B1 EP2179666 B1 EP 2179666B1
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EP
European Patent Office
Prior art keywords
tobacco
slurry
tobacco material
weight
temperature
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.)
Revoked
Application number
EP10152287A
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English (en)
French (fr)
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EP2179666A2 (de
EP2179666A3 (de
Inventor
John-Paul Mua
Darrell Eugene Holton Jr.
James Neil Figlar
Luis Rosete Monsalud Jr.
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RJ Reynolds Tobacco Co
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RJ Reynolds Tobacco Co
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Priority claimed from US11/781,641 external-priority patent/US7946295B2/en
Priority claimed from US11/781,666 external-priority patent/US8061362B2/en
Priority claimed from US11/781,604 external-priority patent/US7810507B2/en
Priority to EP11157884.5A priority Critical patent/EP2377413B1/de
Application filed by RJ Reynolds Tobacco Co filed Critical RJ Reynolds Tobacco Co
Priority to DK11157884.5T priority patent/DK2377413T3/en
Publication of EP2179666A2 publication Critical patent/EP2179666A2/de
Publication of EP2179666A3 publication Critical patent/EP2179666A3/de
Publication of EP2179666B1 publication Critical patent/EP2179666B1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical

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    • 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
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B13/00—Tobacco for pipes, for cigars, e.g. cigar inserts, or for cigarettes; Chewing tobacco; Snuff
    • 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
    • A24B15/183—Treatment of tobacco products or tobacco substitutes sterilization, preservation or biological decontamination
    • 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
    • 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

Definitions

  • the present invention relates to methods for processing tobacco for use in smokeless tobacco compositions.
  • Cigarettes, cigars and pipes are popular smoking articles that employ tobacco in various forms. Such smoking articles are used by heating or burning tobacco, and aerosol (e.g., smoke) is inhaled by the smoker. Tobacco also may be enjoyed in a so-called "smokeless" form. Particularly popular smokeless tobacco products are employed by inserting some form of processed tobacco or tobacco-containing formulation into the mouth of the user.
  • the present invention relates to processes for preparing a tobacco composition suitable for use in a smokeless tobacco product.
  • the product includes a smokeless tobacco formulation that can take various forms, such as loose moist snuff, loose dry snuff, chewing tobacco, pelletized tobacco pieces, extruded or formed tobacco strips, pieces, rods, or sticks, finely divided ground powders, finely divided or milled agglomerates of powdered pieces and components, flake-like pieces, molded processed tobacco pieces, pieces of tobacco-containing gum, rolls of tape-like films, readily water-dissolvable or water-dispersible films or strips, or capsule-like materials.
  • the smokeless tobacco product is in the form of a tobacco formulation disposed within a moisture-permeable container.
  • the smokeless tobacco formulation preferably includes shredded, granular, or particulate particles of tobacco, and may include other ingredients, such as sweeteners, binders, colorants, pH adjusters, fillers, flavoring agents, disintegration aids, antioxidants, oral care additives, and preservatives.
  • Processes for preparing a tobacco composition suitable for use as a smokeless tobacco composition are provided. These processes of the invention can be characterized as including a heat treatment step that can be viewed as a type of pasteurization adapted to degrade, destroy, or denature at least a portion of the microorganisms within the tobacco composition.
  • the process comprises providing a mixture comprising water and a tobacco material having a high moisture content (e.g., in the form of a slurry), such as a mixture comprising at least about 75% by weight water, based on the total weight of the mixture.
  • the mixture is subjected to a heat treatment step for a time and at a temperature adapted to pasteurize the material (e.g., heating the mixture to a temperature of at least about 60°C for a time sufficient to pasteurize the tobacco material).
  • a temperature adapted to pasteurize the material e.g., heating the mixture to a temperature of at least about 60°C for a time sufficient to pasteurize the tobacco material.
  • an amount of a base is added to the mixture sufficient to raise the pH of the mixture to the alkaline pH range (i.e., above 7.0), thereby forming a pH-adjusted mixture.
  • sufficient base is added to raise the pH of the mixture to at least about 8.5.
  • the base addition step and thereafter it is preferable to continue heating the pH-adjusted mixture (e.g., to a temperature of at least about 60°C) for a time sufficient for the pH of the mixture to drop at least about 0.5 pH unit following the base addition step.
  • the pH-adjusted mixture e.g., to a temperature of at least about 60°C
  • the process can further include the step of adding a salt to the mixture prior to or during the heat treatment.
  • the salt addition step can comprise adding about 1 to about 5% by weight of sodium chloride, based on the dry weight of the tobacco material.
  • the mixture can be cooled (e.g., to a temperature of less than about 35°C).
  • a humectant can be added during or following the cooling step.
  • the pH of the mixture can be readjusted with additional base (e.g., to a pH of about 8.0 or less), and the mixture can be dried (e.g., to a moisture content of no more than about 15% by weight, based on the total weight of the dried tobacco material).
  • Flavorants, sweeteners, and additional moisture can be added to the dried tobacco material as desired (e.g., in an amount sufficient to raise the moisture content of the tobacco material to at least about 25% by weight).
  • the process includes: providing a slurry comprising water and a tobacco material, the slurry comprising at least about 80% by weight water, based on the total weight of the slurry; heating the slurry to a temperature of at least about 70°C for at least about 30 minutes (or other suitable time that effectively provides the desired treatment); adding an amount of a base to the slurry sufficient to raise the pH of the slurry to at least about 9.0, thereby forming a pH-adjusted slurry; continuing to heat the pH-adjusted slurry to a temperature of at least about 60°C for at least about 1.5 hours (or other suitable time that effectively provides the desired treatment); cooling the pH-adjusted slurry to about ambient temperature, the pH-adjusted slurry having a pH of at least about 8 at the time the cooling step begins; adding a humectant to the pH-adjusted slurry during or after the cooling step; and drying the pH-a
  • Yet another exemplary process for preparing a tobacco composition suitable for use as a smokeless tobacco composition is provided.
  • This process also includes a heat treatment step that can be viewed as a type of pasteurization treatment.
  • the process comprises providing a moist tobacco material having a first moisture content (e.g., having a moisture content of at least about 30% by weight, based on the total weight of the moist tobacco material), and heating the moist tobacco at a temperature (e.g., a temperature of at least about 85°C) and for a time sufficient to pasteurize the tobacco material while maintaining the moist tobacco material at the same approximate moisture level (i.e., the first moisture content) or higher (e.g., a moisture content at a level of at least about 30% by weight).
  • a first moisture content e.g., having a moisture content of at least about 30% by weight, based on the total weight of the moist tobacco material
  • a temperature e.g., a temperature of at least about 85°C
  • an amount of a base and water can be added to the moist tobacco material in an amount sufficient to raise the pH of the moist tobacco material to a pH in the alkaline pH range (e.g., at least about 8.7) and raise the moisture content of the tobacco material to a second moisture content (e.g., to at least about 40% by weight), thereby forming a pH-adjusted moist tobacco material.
  • a base and water can be added to the moist tobacco material in an amount sufficient to raise the pH of the moist tobacco material to a pH in the alkaline pH range (e.g., at least about 8.7) and raise the moisture content of the tobacco material to a second moisture content (e.g., to at least about 40% by weight), thereby forming a pH-adjusted moist tobacco material.
  • the process can include continuing to heat the pH-adjusted moist tobacco material at an elevated temperature (e.g., a temperature of at least about 55°C) for a time sufficient for the pH of the moist tobacco material to decrease to a lower level within the alkaline pH range (e.g., to drop to less than about 8.5) while maintaining the moisture content at the same approximate moisture level (i.e., the second moisture content) or higher (e.g., at least about 40% by weight).
  • an elevated temperature e.g., a temperature of at least about 55°C
  • a time sufficient for the pH of the moist tobacco material to decrease to a lower level within the alkaline pH range (e.g., to drop to less than about 8.5) while maintaining the moisture content at the same approximate moisture level (i.e., the second moisture content) or higher (e.g., at least about 40% by weight).
  • the tobacco material can then be dried under suitable conditions of time and temperature to reduce the moisture content of the tobacco material (e.g., at a temperature of at least about 35°C for a time sufficient to reduce the moisture content of the tobacco to less than about 35% by weight) while maintaining a pH in the alkaline range (e.g., at least about 7.6).
  • the process can further comprise the step of adding a sweetener composition to the dried tobacco material.
  • the moist tobacco material can comprise a mixture of a dry tobacco material having a moisture content of less than about 15% by weight and an aqueous solution of a salt, and such a mixture can be prepared by heating the dry tobacco material to an elevated temperature (e.g., at least about 60°C) and adding an aqueous salt solution (e.g., a sodium chloride solution) to the heated tobacco material.
  • an elevated temperature e.g., at least about 60°C
  • an aqueous salt solution e.g., a sodium chloride solution
  • the step of continuing to heat the pH-adjusted moist tobacco material comprises heating the pH-adjusted moist tobacco material at a temperature and moisture level sufficient to maintain a pH reduction rate of about 0.05 to about 0.15 pH units per hour.
  • the invention provides a process for preparing a tobacco composition suitable for use as a smokeless tobacco composition, the process comprising: providing a moist tobacco material comprising a mixture of a tobacco material and a salt solution, the moist tobacco material having a moisture content of about 30% to about 40% by weight, based on the total weight of the moist tobacco material; heating the moist tobacco to a temperature of at least about 90°C for at least about 1 hour (or other suitable time that effectively provides the desired treatment) to pasteurize the tobacco material while maintaining the moisture content at a level of about 30% to about 40% by weight; adding an amount of a base and water to the moist tobacco material sufficient to raise the pH of the slurry to at least about 8.7 and raise the moisture content to at least about 45% by weight, thereby forming a pH-adjusted moist tobacco material; continuing to heat the pH-adjusted moist tobacco material to a temperature of at least about 65°C for at least about 1 hour (or other suitable time that effectively provides the desired treatment)
  • the smokeless tobacco product can include tobacco compositions in other forms and can include additives encapsulated or otherwise segregated from other components of the tobacco formulation using methods other than microencapsulation.
  • the tobacco product 10 includes a moisture-permeable container in the form of a pouch 12, which contains a solid tobacco filler material 14 of a type described herein.
  • the smokeless tobacco product also comprises a plurality of microcapsules 16 dispersed within the tobacco filler material 14, the microcapsules containing an additive such as described in greater detail below.
  • the tobacco product 10 includes a container pouch 20.
  • a preferred pouch comprises a moisture permeable mesh material.
  • the illustrated container pouch 20 is sealed closed along its length at an overlap region 22. The overlap region may be formed by sealing the bottom portion of one edge of the pouch 20 over the top portion of the opposite edge of the pouch (e.g., by heat sealing, suitable adhesive, or other suitable means).
  • a solid tobacco material 14 is disposed within the pouch 20, and a plurality of microcapsules 16 are dispersed within the tobacco material.
  • Also disposed within the pouch 20 is an optional larger spherical capsule 26.
  • the spherical capsule 26 has an outer shell 28 that contains an inner payload 30.
  • the tobacco product 10 includes a container pouch 34.
  • a preferred pouch comprises a moisture permeable mesh material.
  • the illustrated pouch 34 is sealed shut at its ends 36, 38 (e.g., by heat-sealing, a suitable adhesive, or other suitable sealing means).
  • a tobacco material 14 is contained within the pouch 34, and dispersed within the tobacco material are a plurality of microcapsules 16.
  • Also contained within the pouch 34 are two optional larger spherical capsules 40 and 42. Each of the spherical capsules 40, 42 has an outer shell 44, 46 that contains an inner payload 50, 52.
  • An optional dissolvable strip of a flavored material shown as a flavor sheet 56 is included in the pouch as well.
  • a strip of flavored material such as the flavor sheet 56 may be disposed in a pouch 34 without any larger capsules being present.
  • the tobacco product 10 includes an outer pouch 12 and an inner pouch 60.
  • Preferred pouches each comprise a moisture permeable mesh material, and the pouches 12, 60 are illustrated without showing a seam that may be present in pouches containing a flavor agent member such as a larger capsule (e.g., a macro-sized capsule), as well as pouches without larger capsules.
  • the outer pouch 12 forms a continuous container around a tobacco material 14 having microcapsules 16 dispersed therein.
  • the inner pouch 60 is disposed within the outer pouch 12 and is generally surrounded by the tobacco material 14, although the inner pouch 60 may also be in contact with, adhered to, or formed continuously with the outer pouch 12.
  • the inner pouch 60 contains a larger capsule 62 with an outer shell 66 and an inner payload 68. Although the inner pouch 60 is shown with interior space surrounding the capsule 62 for purposes of clarity in illustration, in preferred aspects of this embodiment the inner pouch 60 will be closely fitted around its contents.
  • the inner pouch may contain a flavor strip such as a dissolvable flavor strip (for example, a Cinnamon Oral Care Strip available in Listerine PocketPaks from Pfizer, Inc.).
  • the smokeless tobacco product of the invention can include at least one additive or ingredient of the tobacco composition in a form that physically separates or segregates, to a certain extent, the additive from one or more other components of the tobacco composition.
  • the functional advantage of such a separation can vary, but typically involves the minimization or elimination of chemical interaction between the additive and other components of the tobacco composition during conditions of normal storage and/or use. Separation of certain additives can thus enhance storage stability of the resulting tobacco product and/or preserve the desirable sensory characteristics of the product.
  • the means of separation can take various forms, including encapsulation of the additive or use of the additive in various forms such as beads, pellets, rods, films, strands, layered or laminate structures, sheets, strips, or other shaped items.
  • the additive can be dispersed within a matrix material and shaped into a desired form.
  • the additive can also be physically entrapped or encapsulated within a seam of a pouch housing the tobacco composition.
  • the additive is in an encapsulated form comprising an outer wall or barrier structure and an inner region containing the additive.
  • certain embodiments of the invention include a plurality of microcapsules, the microcapsules including an inner or core region encapsulated by an outer shell region.
  • the inner region includes a payload of an additive either adapted for enhancing one or more sensory characteristics of the smokeless tobacco product, such as taste, mouthfeel, moistness, coolness/heat, and/or fragrance, or adapted for adding an additional functional quality to the smokeless tobacco product, such as addition of an antioxidant or immune system enhancing function.
  • the outer shell or coating of the microcapsules serves as a barrier between the payload and the tobacco composition of the smokeless tobacco product.
  • this barrier can be permanent, meaning it is intended to remain in place as a barrier during the life of the product, or temporary, meaning the barrier is designed to stop serving as a barrier, and thereby release the payload, under certain conditions of product use.
  • the additive in the core region is released when the outer shell undergoes some type of physical destruction, breakage, or other loss of physical integrity (e.g., through disintegration, softening, crushing, application of pressure, or the like), and thereby alters the sensory or functional properties of the smokeless tobacco product during use of the product.
  • the microcapsules may be incorporated within the pouch along with the tobacco formulation, and during use, contact of the microcapsules with moisture present in the user's mouth may cause the microcapsules to soften, lose their physical integrity, and release the additive within the user's mouth.
  • the microcapsules may be purposefully crushed by application of pressure to release the additive.
  • the shell is not designed to release the additive under conditions of normal use, such as in the case of microencapsulated filler materials.
  • the tobacco product 10 is typically used by placing one pouch containing the tobacco formulation in the mouth of a human subject/user.
  • saliva in the mouth of the user causes some of the components of the tobacco formulation to pass through the water-permeable pouch and into the mouth of the user.
  • the pouch preferably is not chewed or swallowed.
  • the user is provided with tobacco flavor and satisfaction, and is not required to spit out any portion of the tobacco formulation.
  • the microcapsules undergo destruction during use of the product, and the contents of the microcapsules are introduced into the mouth of the user.
  • the contents of the microcapsules and substantial amounts of the tobacco formulation have been ingested by the human subject, and the pouch may be removed from the mouth of the human subject for disposal.
  • Exemplary types of additives that can be separated from other components of the tobacco formulation by encapsulation (e.g., included in the payload of microcapsules) or other techniques include water, flavorants, tobacco material (e.g., tobacco material in particulate form or in the form of a tobacco extract), organic and inorganic fillers (e.g., grains, processed grains, puffed grains, maltodextrin, dextrose, calcium carbonate, calcium phosphate, corn starch, lactose, manitol, xylitol, sorbitol, finely divided cellulose, and the like), binders (e.g., povidone, sodium carboxymethylcellulose and other modified cellulosic types of binders, sodium alginate, xanthan gum, starch-based binders, gum arabic, lecithin, and the like), pH adjusters or buffering agents (e.g., metal hydroxides, preferably alkali metal hydroxides such as sodium hydroxide and potassium hydro
  • Exemplary flavorants that can be used are components, or suitable combinations of those components, that act to alter the bitterness, sweetness, sourness, or saltiness of the smokeless tobacco product, enhance the perceived dryness or moistness of the formulation, or the degree of tobacco taste exhibited by the formulation.
  • flavorants include salts (e.g., sodium chloride, potassium chloride, sodium citrate, potassium citrate, sodium acetate, potassium acetate, and the like), natural sweeteners (e.g., fructose, sucrose, glucose, maltose, mannose, galactose, lactose, and the like), artificial sweeteners (e.g., sucralose, saccharin, aspartame, acesulfame K, neotame, and the like); and mixtures thereof.
  • Flavorants may be natural or synthetic, and the character of these flavors imparted thereby may be described, without limitation, as fresh, sweet, herbal, confectionary, floral, fruity or spice.
  • flavors include, but are not limited to, vanilla, coffee, chocolate/cocoa, cream, mint, spearmint, menthol, peppermint, wintergreen, eucalyptus, lavender, cardamon, nutmeg, cinnamon, clove, cascarilla, sandalwood, honey, jasmine, ginger, anise, sage, licorice, lemon, orange, apple, peach, lime, cherry, strawberry, and any combinations thereof. See also, Leffingwell et al., Tobacco Flavoring for Smoking Products, R. J. Reynolds Tobacco Company (1972 ), which is incorporated herein by reference. Flavorings also may include components that are considered moistening, cooling or smoothening agents, such as eucalyptus.
  • These flavors may be provided neat (i.e., alone) or in a composite (e.g., spearmint and menthol, or orange and cinnamon).
  • Composite flavors may be combined in a single microcapsule as a mixture, or as separate components of separate microcapsules.
  • the segregated additive such as an additive in the payload of the microcapsules
  • is a tobacco-based flavorant composition such as a flavorant comprising particulate tobacco material or a tobacco extract (e.g., an aqueous tobacco extract in solid form).
  • a tobacco-based flavorant composition such as a flavorant comprising particulate tobacco material or a tobacco extract (e.g., an aqueous tobacco extract in solid form).
  • a microencapsulated flavorant can provide the smokeless tobacco formulation with extended release flavor characteristics. Some forms of smokeless tobacco formulations deliver a strong sensory profile. By microencapsulating a portion of the tobacco material in the formulation, a milder sensory experience can be achieved.
  • Microencapsulation of a tobacco flavorant can also extend the sensory experience by providing a slow continuous release of tobacco flavor over time as the product resides in the mouth.
  • Preferred microencapsulated tobacco flavorants will provide extended release of the tobacco flavorant under conditions of normal use of the smokeless tobacco product, such as under conditions of a 45% or greater moisture level, based on the total weight of the smokeless tobacco product.
  • Extracts useful as components of the tobacco formulation can be employed. Extracts can be used in solid form (e.g., spray-dried or freeze-dried form), in liquid form, in semi-solid form, or the like.
  • Exemplary tobacco extracts and extraction techniques are set forth, for example, in US Pat. Nos. 4,150,677 to Osborne, Jr. et al. ; 4,967,771 to Fagg et al. ; 5,005,593 to Fagg et al. ; 5,148,819 to Fagg ; and 5,435,325 to Clapp et al. ,.
  • Various tobacco extraction and reconstitution methodologies are set forth in US Pat. Nos.
  • Suitable known reconstituted tobacco processing techniques such as paper-making techniques or casting-type processes, can be employed. See, for example, the types of paper-making processes set forth in US Pat. Nos. 3,398,754 to Tughan ; 3,847,164 to Mattina ; 4,131,117 to Kite ; 4,270,552 to Jenkins ; 4,308,877 to Mattina ; 4,341,228 to Keritsis ; 4,421,126 to Gellatly ; 4,706,692 to Gellatly ; 4,962,774 to Thomasson ; 4,941,484 to Clapp ; 4,987,906 to Young ; 5,056,537 to Brown ; 5,143,097 to Sohn ; 5,159,942 to Brinkley et al.
  • the segregated additive such as an additive in the payload of the microcapsules, comprises vanillin as a flavorant.
  • vanillin as a flavorant.
  • the microencapsulated vanillin can be in the form of a complexed vanillin that releases vanillin over time, such as ethylvanillin glucoside.
  • the microencapsulated vanillin will provide extended release of vanillin during conditions of normal use, such as under conditions of a 45% or greater moisture level.
  • the segregated additive such as an additive in the payload of the microcapsules
  • SUCRASWEET® is a combination of neotame, acesulfame potassium, and maltitol. It is possible for certain sweeteners, particularly sweeteners containing neotame, to exhibit a lack of stability under certain conditions, such as basic pH. Certain sweeteners can chemically breakdown to form byproducts that can alter the sensory characteristics of the smokeless tobacco formulation in an undesirable manner, such as by increasing bitterness.
  • microencapsulated sweetener flavorant By microencapsulating such sweeteners, breakdown of the sweetener flavorant can be reduced or avoided and the desired sensory profile of the smokeless tobacco product can be preserved for a longer period of time.
  • the microencapsulated sweetener flavorant will provide a continuous and extended release of flavorant and exhibit water-solubility during conditions of normal use, such as under conditions of a 45% or greater moisture level.
  • the segregated additive such as an additive in the payload of the microcapsules
  • water which serves to increase the moisture level of the smokeless tobacco product.
  • the microencapsulated water preferably provides a rapid release of water.
  • the outer shell of the microcapsules in this embodiment are preferably designed to rupture during use, such as by crushing of the microcapsules by the user, thereby resulting in rapid release of water in the product at any time during or before use of the product.
  • microencapsulated water is particularly suitable for tobacco formulations having a moisture content, prior to use (e.g., during storage), of less than about 20 weight percent, frequently less than about 15 weight percent, and often less than about 10 weight percent, based on the total weight of the tobacco formulation.
  • a typical moisture content range for the tobacco formulation in this embodiment is about 5 to about 20 weight percent.
  • the additive can also be in the form of isolated components (e.g., oils or extracts) from botanical or herbal sources, such as potato peel, grape seed, ginseng, gingko biloba, Saint John's Wort, saw palmetto, green tea, black tea, black cohosh, cayenne, chamomile, cranberry, echinacea, garlic, evening primrose, feverfew, ginger, goldenseal, hawthorn, kava, licorice, milk thistle, uva ursi, or valerian.
  • botanical or herbal sources such as potato peel, grape seed, ginseng, gingko biloba, Saint John's Wort, saw palmetto, green tea, black tea, black cohosh, cayenne, chamomile, cranberry, echinacea, garlic, evening primrose, feverfew, ginger, goldenseal, hawthorn, kava, licorice, milk thistle, uva ursi, or vale
  • Additives such as the oils and extracts noted above, often include compounds from various classes known to provide certain bioactive effects, such as minerals, vitamins, isoflavones, phytoesterols, allyl sulfides, dithiolthiones, isothiocyanates, indoles, lignans, flavonoids, polyphenols, and carotenoids.
  • Exemplary compounds found in these types of extracts or oils include ascorbic acid, peanut endocarb, resveratrol, sulforaphane, beta-carotene, lycopene, lutein, co-enzyme Q, carnitine, quercetin, kaempferol, and the like.
  • the oil or extract additives used in the present invention may comprise, without limitation, any of the compounds and sources set forth herein, including mixtures thereof.
  • Certain additives of this type are sometimes referred to as dietary supplements, nutraceuticals, "phytochemicals” or "functional foods”.
  • These types of additives are sometimes defined in the art as encompassing substances typically available from naturally-occurring sources (e.g., plant materials) that provide one or more advantageous biological effects (e.g., health promotion, disease prevention, or other medicinal properties), but are not classified or regulated as drugs.
  • the microencapsulated additive can add advantageous biological functions to the product, such as immune system boosting effects, antioxidant effects, and the like. Microencapsulation can increase the probability that the bioactive additive will remain in an active form until the product is used. In preferred embodiments, the microencapsulated bioactive additive will provide a continuous and extended release of the additive and exhibit water-solubility during conditions of normal use, such as at a 45% or greater moisture level.
  • the segregated additive such as an additive in the payload of the microcapsules, may comprise a buffering agent, such as sodium bicarbonate and/or sodium carbonate.
  • a buffering agent such as sodium bicarbonate and/or sodium carbonate.
  • Suitable buffering agents typically buffer at a pH of at least about 6.0, often at least about 7.0, and frequently at least about 7.5.
  • Suitable buffering agents typically buffer at a pH of less than about 10.0, often less than about 9.5, and frequently less than about 9.0.
  • microencapsulated buffering agent that provides extended release can aid in maintaining the product pH in a desired range, which results in a more consistent sensory profile for the product and extends shelf-life.
  • the microencapsulated buffering agent will release buffering agent as the temperature of the product exceeds a certain temperature threshold (e.g., about 80°F or about 27°C) or when the product pH decreases to an undesirably low level (e.g., 7.3 or less).
  • the segregated additive such as an additive in the payload of the microcapsules
  • Certain filler materials can impart less desirable sensory characteristics to the smokeless tobacco product.
  • certain fillers may have a grainy or mealy texture or taste. Microencapsulation, or otherwise achieving physical separation, of the filler can serve to minimize the effect of the sensory characteristics of the filler on the overall sensory profile of the smokeless tobacco product. In this manner, fillers can be advantageously employed when a milder product taste is desired without imparting any taste off-notes.
  • a particularly preferred filler is FIBREX® brand filler available from International Fiber Corporation, which is a fiber material derived from sugar beets.
  • suitable filler materials include oats or other cereal grain, bran fibers, starch, or other modified or natural cellulosic materials.
  • the microencapsulated filler is in a non-water soluble form under conditions of normal use, such as at a moisture level of 45% or greater by weight.
  • the outer shell of the microcapsules it is preferable for the outer shell of the microcapsules to lose physical integrity under conditions of normal use in the mouth of the user, such as under conditions of relatively high moisture (e.g., above 45% moisture based on the total weight of the smokeless tobacco product). In other embodiments, it is preferably for the outer shell of the microcapsules to lose physical integrity when the smokeless tobacco product reaches a certain pH, such as a pH at or below about 7.3, or a certain temperature, such as at or above about 27°C.
  • the microcapsules are designed to rupture when acted upon by physical force or pressure by the user, either through pressure applied by hand prior to insertion of the product in the mouth or through pressure applied after the product is inserted into the oral cavity (e.g., pressure applied by the tongue or teeth).
  • the microcapsule payload can have a form that can vary.
  • the payload has the form of a liquid or gel, although the payload can be in the form of a solid (e.g., a crystalline material or a dry powder).
  • the payload is a mixture of the additive (e.g., a flavoring agent) and a diluting agent or carrier (e.g., water).
  • a preferred diluting agent is a triglyceride, such as a medium chain triglyceride, and more particularly a food grade mixture of medium chain triglycerides. See, for example, Radzuan et al., Porim Bulletin, 39, 33-38 (1999 ).
  • the amount of additive and diluting agent within the microcapsule may vary. In some instances, the diluting agent may be eliminated altogether, and the entire payload can be composed of the additive. Alternatively, the payload can be almost entirely comprised of diluting agent, and only contain a very small amount of relatively potent additive.
  • the composition of the mixture of additive and diluting agent is in the range of about 5 percent to about 99 percent additive, and more preferably in the range of about 5 to about 75 percent additive, and most preferably in the range of about 10 to about 25 percent additive, by weight based on the total weight of the payload, with the balance being diluting agent. The exact amount of additive will depend on several factors including the additive type and the desired sensory profile of the product.
  • the crush strength of the microcapsules is sufficient to allow for normal handling and storage without significant degree of premature or undesirable breakage. Providing capsules that possess both suitable integrity during storage and the ability to rupture or otherwise break down at the time of use can be determined by experimentation, depending upon factors such as capsule size and type, and is a matter of design choice. See, for example, U.S. Pat. Pub. No. 2007/0068540 to Thomas et al. , .
  • An exemplary microcapsule may include an outer shell incorporating a material such as wax, gelatin, cyclodextrin, or alginate, and an inner payload incorporating an aqueous or non-aqueous liquid (e.g., a solution or dispersion of at least one flavoring ingredient within water or an organic liquid such as an alcohol or oil; or a mixture of water and a miscible liquid like alcohol or glycerin).
  • aqueous or non-aqueous liquid e.g., a solution or dispersion of at least one flavoring ingredient within water or an organic liquid such as an alcohol or oil; or a mixture of water and a miscible liquid like alcohol or glycerin.
  • a plurality of such microcapsules may be incorporated within the pouch along with the tobacco formulation; and during use of the product, a crushing or other physical destruction of the microcapsules may allow the microcapsules to release the additive contained therein to provide suitable moistening of components of the tobacco formulation, as well as provide other functional benefits such as enhanced taste.
  • a suitable number of capsules having outer shells comprising a food grade waxy substance and an inner payload comprising water may be incorporated within a pouch such that, upon rupture of those capsules, sufficient water is released to provide a desired moistening effect upon the tobacco formulation.
  • microcapsules used in the smokeless tobacco product of the invention may be uniform or varied in size, weight, and shape, and such properties of the microcapsules will depend upon the desired properties of the smokeless tobacco product.
  • a representative microcapsule is generally spherical in shape.
  • suitable microcapsules may have other types of shapes, such as generally rectilinear, oblong, elliptical, or oval shapes.
  • Exemplary microcapsules may have diameters of less than about 100 microns, such as microcapsules having diameters in the range of about 1 to about 40 microns, or about 1 micron to about 20 microns.
  • the number of microcapsules incorporated into the smokeless tobacco product can vary, depending upon factors such as the size of the microcapsules, the character or nature of the additive in the payload, the desired attributes of the smokeless tobacco product, and the like.
  • the number of microcapsules incorporated within smokeless tobacco product can exceed about 5, can exceed about 10, can exceed about 20, can exceed about 40, and can even exceed about 100. In certain embodiments, the number of capsules can be greater than about 500, and even greater than about 1,000.
  • the total weight of the microcapsules contained within the smokeless tobacco product may vary, but is typically greater than about 10 mg, often greater than about 20 mg, and can be greater than about 30 mg.
  • the total weight of the microcapsules is typically less than about 200 mg, often less than about 100 mg, and can be less than about 50 mg.
  • the relative weight of the microcapsules in the pouch may vary. Typically, the dry weight of the tobacco within the smokeless tobacco product is greater than the weight provided by microcapsule components. However, the weight of microcapsule components can range from about 10 percent to about 75 percent, often about 20 percent to about 50 percent, based on the combined weight of microcapsule components and dry weight of tobacco.
  • microcapsules of different sizes and/or of different types may be incorporated within the product.
  • different microcapsules may be incorporated into the product to provide desired properties (e.g., mouthfeel, flavor, other sensory effect), and/or to provide release of encapsulated components at different times during the use of the product.
  • a first flavoring ingredient may be released from a first set of microcapsules upon initial introduction of the product to a user's mouth, and a second flavoring ingredient, contained in a second set of microcapsules, may not be released until a later time (e.g., a semi-soluble coating of the second capsules takes longer to rupture than the coating of the first capsule set).
  • microcapsules of the invention can be formed using any microencapsulating technology known in the art.
  • the microcapsules can be formed using any of various chemical encapsulation techniques such as solvent evaporation, solvent extraction, organic phase separation, interfacial polymerization, simple and complex coacervation, in-situ polymerization, liposome encapsulation, and nanoencapsulation.
  • chemical encapsulation techniques such as solvent evaporation, solvent extraction, organic phase separation, interfacial polymerization, simple and complex coacervation, in-situ polymerization, liposome encapsulation, and nanoencapsulation.
  • physical methods of encapsulation could be used, such as spray coating, pan coating, fluid bed coating, annular jet coating, spinning disk atomization, spray cooling, spray drying, spray chilling, stationary nozzle coextrusion, centrifugal head coextrusion, or submerged nozzle coextrusion.
  • Coacervation is a colloid phenomenon that begins with a solution of a colloid in an appropriate solvent. Depending on the nature of the colloid, various changes can bring about a reduction of the solubility of the colloid. As a result of this reduction, a significant portion of the colloid can be separated out into a new phase, thus forming a two phase system, with one being rich and the other being poor in colloid concentration.
  • the colloid-rich phase in a dispersed state appears as amorphous liquid droplets called coacervate droplets. Upon standing, these coalesce into one clear homogenous colloid-rich liquid layer, known as the coacervate layer, which can be deposited so as to produce the wall material of the resultant microcapsules.
  • Simple coacervation can be effected either by mixing two colloidal dispersions, one having a high affinity for water, or it can be induced by adding a strongly hydrophilic substance such as alcohol or sodium sulfate.
  • a water soluble polymer is concentrated in water by the action of a water miscible, non-solvent for the emerging polymer (e.g., gelatin) phase.
  • Ethanol, acetone, dioxane, isopropanol and propanol are exemplary solvents that can cause separation of a coacervate such as gelatin, polyvinyl alcohol, or methyl cellulose.
  • Phase separation can be effected by the addition of an electrolyte such as an inorganic salt to an aqueous solution of a polymer such as gelatin, polyvinyl alcohol, or carboxymethylcellulose.
  • Complex coacervation can be induced in systems having two dispersed hydrophilic colloids of opposite electric charges. Neutralization of the overall positive charges on one of the colloids by the negative charge on the other is used to bring about separation of the polymer-rich complex coacervate phase.
  • the gelatin-gum arabic (gum acacia) system is one known complex coacervation system.
  • Organic phase separation is sometimes more simply referred to as "water-in-oil" microencapsulation.
  • the polar core is dispersed into an oily or non-polar continuous medium.
  • the wall material is then dissolved in this continuous medium.
  • the outer wall or shell material and solvents used to form the microcapsules of the invention can vary.
  • Classes of materials that are typically used as wall or shell materials include proteins, polysaccharides, starches, waxes, fats, natural and synthetic polymers, and resins.
  • Exemplary materials for use in the microencapsulation process used to form the microcapsules include gelatin, acacia (gum arabic), polyvinyl acetate, potassium alginate, carob bean gum, potassium citrate, carrageenan, potassium polymetaphosphate, citric acid, potassium tripolyphosphate, dextrin, polyvinyl alcohol, povidone, dimethylpolysiloxane, dimethyl silicone, refined paraffin wax, ethylcellulose, bleached shellac, modified food starch, sodium alginate, guar gum, sodium carboxymethylcellulose, hydroxypropyl cellulose, sodium citrate, hydroxypropylmethylcellulose, sodium ferrocyanide, sodium polyphosphates, locust bean gum, methylcellulose, sodium trimetaphosphate, methyl ethyl cellulose, sodium tripolyphosphate, microcrystalline wax, tannic acid, petroleum wax, terpene resin, tragacanth, polyethylene, xanthan gum, and polyethylene glycol
  • Microcapsules are commercially available, and exemplary types of microcapsule technologies are of the type set forth in Gutcho, Microcapsules and Microencapsulation Techniques (1976 ); Gutcho, Microcapsules and Other Capsules Advances Since 1975 (1979 ); Kondo, Microcapsule Processing and Technology (1979 ); Iwamoto et al., AAPS Pharm. Sci. Tech. 2002 3(3): article 25 ; U.S. Pat. Nos. 3,550,598 to McGlumphy ; 4,889,144 to Tateno et al. ; 5,004,595 to Cherukuri et al. ; 5,690,990 to Bonner ; 5,759,599 to Wampler et al.
  • microcapsules are available from sources such as Microtek Laboratories of Dayton, Ohio.
  • Suitable types of microencapsulating techniques include those marketed under the trade names ULTRASEAL TM and PERMASEAL TM available from Givaudan headquartered in Vernier, Switzerland.
  • embodiments of the smokeless tobacco product may include larger capsules containing any of the additives described herein for use in microcapsules.
  • Exemplary smaller spherical capsules have diameters of at least about 0.5 mm, generally at least about 1 mm, often at least about 2 mm, and frequently at least about 3 mm.
  • Exemplary larger spherical capsules have diameters of less than about 6 mm, and often less than about 5 mm.
  • Exemplary smaller individual capsules weigh at least about 5 mg, often at least about 15 mg, and frequently at least about 25 mg.
  • Exemplary larger individual capsules weigh less than about 75 mg, generally less than about 65 mg, and often less than about 55 mg.
  • capsules are of the type commercially available as “Momints” by Yosha! Enterprises, Inc. and “Ice Breakers Liquid Ice” from The Hershey Company. Representative types of capsules also have been incorporated in chewing gum, such as the type of gum marketed under the tradename "Cinnaburst” by Cadbury Adams USA. Representative types of capsules and components thereof also are set forth in US Pat. Nos. 3,339,558 to Waterbury ; 3,390,686 to Irby, Jr. et al. ; 3,685,521 to Dock ; 3,916,914 to Brooks et al. ; 4,889,144 to Tateno et al. 6,631,722 to MacAdam et al.
  • the capsules may be colored, provided with smooth or rough surfaces, have rigid or pliant shells, have brittle or durable shells, or other desired features or characters.
  • the smokeless tobacco product can include other flavorants in the form of beads, pellets, rods, strands, sheets, strips, or other shaped items designed to deliver a pre-determined, concentrated amount of a flavoring ingredient to the user.
  • Such forms typically include a carrier material (i.e., a matrix material) and a flavorant dispersed therein, and allow for controlled delivery of the flavorant.
  • a carrier material i.e., a matrix material
  • flavorant dispersed therein i.e., a matrix material
  • representative types of materials and ingredients useful for the manufacture of essentially water insoluble flavored beads, strands or pellets may be found within the filters of cigarettes available as Camel Dark Mint, Camel Mandarin Mint, Camel Spice Crema, Camel Izmir Stinger, Camel Spice Twist, Camel Mandalay Lime and Camel Aegean Spice by R. J. Reynolds Tobacco Company.
  • At least one flavored strip, piece or sheet of flavored water dispersible or water soluble material may be disposed within each pouch as shown in FIG. 3 .
  • flavored water dispersible or water soluble material e.g., a breath-freshening edible film type of material
  • Such strips or sheets may be folded or crumpled in order to be readily incorporated within the pouch. See, for example, the types of materials and technologies set forth in US Pat. Nos. 6,887,307 to Scott et al. and 6,923,981 to Leung et al. ; and The EFSA Journal (2004) 85, 1-32 ;
  • At least one larger capsule may be enclosed within a small moisture permeable mesh pouch that is in turn contained within the outer mesh container of the smokeless tobacco product.
  • the tobacco formulation within the pouch may be segregated from at least one of the capsules also contained within that pouch, as shown in FIG. 4 .
  • the tobaccos may include types of tobaccos such as flue-cured tobacco, burley tobacco, Oriental tobacco, Maryland tobacco, dark tobacco, dark-fired tobacco, dark air cured (e.g., passanda, cubano, jatin and bezuki tobaccos) or light air cured (e.g., North Wisconsin and galpoa tobaccos), and Rustica tobaccos, as well as other rare or specialty tobaccos.
  • types of tobaccos such as flue-cured tobacco, burley tobacco, Oriental tobacco, Maryland tobacco, dark tobacco, dark-fired tobacco, dark air cured (e.g., passanda, cubano, jatin and bezuki tobaccos) or light air cured (e.g., North Wisconsin and galpoa tobaccos), and Rustica tobaccos, as well as other rare or specialty tobaccos.
  • Descriptions of various types of tobaccos, growing practices, harvesting practices and curing practices are set forth in Tobacco Production, Chemistry and Technology, Davis et al. (Eds.) (1999 ). See, also
  • the tobacco materials are those that have been appropriately cured and aged.
  • Especially preferred techniques and conditions for curing flue-cured tobacco are set forth in Nestor et al., Beitrage Tabakforsch. Int., 20 (2003) 467-475 and U.S. Pat. No. 6,895,974 to Peele .
  • Representative techniques and conditions for air curing tobacco are set forth in Roton et al., Beitrage Tabakforsch.
  • Tobacco products of the present invention may incorporate a single type of tobacco (e.g., in a so-called "straight grade" form).
  • the tobacco within a tobacco product may be composed solely of flue-cured tobacco (e.g., all of the tobacco may be composed, or derived from, either flue-cured tobacco lamina or a mixture of flue-cured tobacco lamina and flue-cured tobacco stem).
  • the tobacco within a tobacco product also may have a so-called "blended" form.
  • the tobacco within a tobacco product of the present invention may include a mixture of parts or pieces of flue-cured, burley (e.g., Malawi burley tobacco) and Oriental tobaccos (e.g., as tobacco composed of, or derived from, tobacco lamina, or a mixture of tobacco lamina and tobacco stem).
  • a representative blend may incorporate about 30 to about 70 parts burley tobacco (e.g., lamina, or lamina and stem), and about 30 to about 70 parts flue cured tobacco (e.g., stem, lamina, or lamina and stem) on a dry weight basis.
  • exemplary tobacco blends incorporate about 75 parts flue-cured tobacco, about 15 parts burley tobacco, and about 10 parts Oriental tobacco; or about 65 parts flue-cured tobacco, about 25 parts burley tobacco, and about 10 parts Oriental tobacco; or about 65 parts flue-cured tobacco, about 10 parts burley tobacco, and about 25 parts Oriental tobacco; on a dry weight basis.
  • the tobacco material can have the form of processed tobacco parts or pieces, cured and aged tobacco in essentially natural lamina or stem form, a tobacco extract, extracted tobacco pulp (e.g., using water as a solvent), or a mixture of the foregoing (e.g., a mixture that combines extracted tobacco pulp with granulated cured and aged natural tobacco lamina).
  • the tobacco that is used for the tobacco product most preferably includes tobacco lamina, or tobacco lamina and stem mixture. Tobacco mixtures incorporating a predominant amount of tobacco lamina, relative to tobacco stem, are preferred. Most preferably, the tobacco lamina and stem are used in an unextracted form, that is, such that the extractable portion (e.g., the water soluble portion) is present within the unextractable portion (e.g., the tobacco pulp) in a manner comparable to that of natural tobacco provided in a cured and aged form. Most preferably, the tobacco is not provided in a reconstituted form, extruded form, or any form that has resulted from extraction and recombination of components of that tobacco.
  • portions of the tobaccos within the tobacco product may have processed forms, such as processed tobacco stems (e.g., cut-rolled stems, cut-rolled-expanded stems or cut-puffed stems), or volume expanded tobacco (e.g., puffed tobacco, such as dry ice expanded tobacco (DIET)).
  • processed tobacco stems e.g., cut-rolled stems, cut-rolled-expanded stems or cut-puffed stems
  • volume expanded tobacco e.g., puffed tobacco, such as dry ice expanded tobacco (DIET)
  • the tobacco product optionally may incorporate tobacco that has been fermented. See, also, the types of tobacco processing techniques set forth in PCT WO 05/063060 to Atchley et al. , .
  • the tobacco material may be cased and dried, and then ground to the desired form.
  • the tobacco material may be cased with an aqueous casing containing components such as sugars (e.g., fructose, glucose, and sucrose), humectants (e.g., glycerin and propylene glycol), flavoring ingredients (e.g., cocoa and licorice), and the like.
  • Non-aqueous casing components preferably are applied to the tobacco in amounts of about 1 percent to about 15 percent, based on the dry weight of the tobacco.
  • the tobacco used for the manufacture of the tobacco product preferably is provided in a shredded, ground, granulated, fine particulate, or powder form.
  • the tobacco is employed in the form of parts or pieces that have an average particle size less than that of the parts or pieces of shredded tobacco used in so-called "fine cut" tobacco products.
  • the very finely divided tobacco particles or pieces are sized to pass through a screen of about 18 Tyler mesh, generally are sized to pass a screen of about 20 Tyler mesh, often are sized to pass through a screen of about 50 Tyler mesh, frequently are sized to pass through a screen of about 60 Tyler mesh, may even be sized to pass through a screen of 100 Tyler mesh, and further may be sized so as to pass through a screen of 200 Tyler mesh.
  • air classification equipment may be used to ensure that small sized tobacco particles of the desired sizes, or range of sizes, may be collected.
  • the tobacco material is in particulate form sized to pass through an 18 Tyler mesh, but not through a 60 Tyler mesh. If desired, differently sized pieces of granulated tobacco may be mixed together.
  • the very finely divided tobacco particles or pieces suitable for snus products have a particle size greater than -8 Tyler mesh, often -8 to +100 Tyler mesh, frequently -18 to +60 Tyler mesh.
  • tobacco parts or pieces are comminuted, ground or pulverized into a powder type of form using equipment and techniques for grinding, milling, or the like.
  • the tobacco is relatively dry in form during grinding or milling, using equipment such as hammer mills, cutter heads, air control mills, or the like.
  • tobacco parts or pieces may be ground or milled when the moisture content thereof is less than about 15 weight percent to less than about 5 weight percent.
  • the relative amount of tobacco within the tobacco formulation may vary.
  • the amount of tobacco within the tobacco formulation is at least about 25 percent or at least about 30 percent, on a dry weight basis of the formulation.
  • the amounts of other components within the tobacco formulation may exceed about 40 percent, on a dry weight basis.
  • a typical range of tobacco material within the formulation is about 30 to about 40 weight percent.
  • the moisture content of the tobacco formulation prior to use by a consumer of the formulation may vary. Typically, the moisture content of the tobacco formulation, as present within the pouch prior to insertion into the mouth of the user, is less than about 55 weight percent, generally is less than about 50 weight percent, and often is less than about 45 weight percent. Certain types of tobacco formulations have moisture contents, prior to use, of less than about 15 weight percent, frequently less than about 10 weight percent, and often less than about 5 weight percent. For certain tobacco products, such as those incorporating snus-types of tobacco compositions, the moisture content may exceed 20 weight percent, and often may exceed 30 weight percent. For example, a representative snus-type product may possess a tobacco composition exhibiting a moisture content of about 25 weight percent to about 50 weight percent, preferably about 30 weight percent to about 40 weight percent.
  • the manner by which the moisture content of the formulation is controlled may vary.
  • the formulation may be subjected to thermal or convection heating.
  • the formulation may be oven-dried, in warmed air at temperatures of about 40°C to about 95°C, with a preferred temperature range of about 60°C to about 80°C for a length of time appropriate to attain the desired moisture content.
  • tobacco formulations may be moistened using casing drums, conditioning cylinders or drums, liquid spray apparatus, ribbon blenders, mixers available as FKM130, FKM600, FKM1200, FKM2000 and FKM3000 from Littleford Day, Inc., Plough Share types of mixer cylinders, and the like.
  • moist tobacco formulations such as the types of tobacco formulations employed within snus types of products, are subjected to pasteurization or fermentation.
  • Techniques for pasteurizing or fermenting snus types of tobacco products will be apparent to those skilled in the art of snus product design and manufacture.
  • the acidity or alkalinity of the tobacco formulation can vary.
  • the pH of that formulation is at least about 6.5, and preferably at least about 7.5.
  • the pH of that formulation will not exceed about 9, and often will not exceed about 8.5.
  • a representative tobacco formulation exhibits a pH of about 6.8 to about 8.2.
  • a representative technique for determining the pH of a tobacco formulation involves dispersing 5 g of that formulation in 100 ml of high performance liquid chromatography water, and measuring the pH of the resulting suspension/solution (e.g., with a pH meter).
  • the tobacco parts or pieces may be irradiated, or those parts and pieces may be pasteurized, or otherwise subjected to controlled heat treatment.
  • the component materials may be irradiated, or those component materials may be pasteurized, or otherwise subjected to controlled heat treatment.
  • a formulation may be prepared, followed by irradiation or pasteurization, and then flavoring ingredient(s) may be applied to the formulation.
  • the tobacco formulation can be irradiated or pasteurized after the tobacco formulation has been incorporated within a moisture-permeable packet or pouch (e.g., so as to provide individual containers of snus-type smokeless tobacco product.
  • the present invention relates to a tobacco treatment process.
  • the process involves heat treatment of tobacco used in the preparation of a tobacco formulation suitable for use as a smokeless tobacco formulation.
  • the process involves subjecting tobacco material, which most preferably is in moist form, to heat treatment.
  • the heat treatment can be carried out in an enclosed vessel (e.g., one providing for a controlled atmospheric environment, controlled atmospheric components, and a controlled atmospheric pressure), or in a vessel that is essentially open to ambient air.
  • the heat treatment which is provided by subjecting the tobacco material to a sufficiently high temperature for a sufficient length of time, has the ability to alter the overall character or nature of the tobacco material to a desired degree.
  • the heat treatment can be used to provide a desired color or visual character to the tobacco material, desired sensory properties to the tobacco material, or a desired physical nature or texture to the tobacco material.
  • the heat treatment causes the tobacco material to experience a treatment characteristic of a pasteurization type of treatment.
  • certain types and amounts of spores, mold, microbes, bacteria, and the like can be rendered inactive, or the enzymes generated thereby can be denatured or otherwise rendered inactive.
  • Certain components that are rendered inactive, or are otherwise effectively reduced in number, are biological agents (e.g., enzymes) that have the capability of promoting formation of tobacco-specific nitrosamines.
  • Pasteurization techniques are set forth, for example, on the websites of the U.S. Food and Drug Administration and the U.S. Department of Agriculture.
  • the temperature and time of the heat treatment process will vary, and generally, the length of the heat treatment will decrease as the temperature of the heat treatment increases. It is preferably to avoid excessively high heat treatment temperatures, such as temperatures at or above the boiling point of water. However, the temperature of the heat treatment step can be characterized as elevated, meaning the temperature is greater than room temperature (i.e., greater than 25°C).
  • the methods and equipment used to accomplish the heat treatment can vary. The temperature can be controlled by using a jacketed vessel, direct steam injection into the tobacco, bubbling hot air through the tobacco, and the like.
  • the processes of the invention set forth below can be performed using equipment known in the art such as various mixing apparatus, including various jacketed mixing apparatus capable of heating the contents of the mixer, as well as stirring or agitating the contents of the mixer.
  • Exemplary mixing vessels include mixers available from Scott Equipment Company, Littleford Day, Inc., Lödige Process Technology, and the Breddo Likwifier Division of American Ingredients Company.
  • Examples of vessels which provide a pressure controlled environment include high pressure autoclaves available from Berghof/America Inc. of Concord, California, and high pressure reactors available from The Parr Instrument Co. (e.g., Parr Reactor Model Nos. 4522 and 4552 described in U.S. Patent No. 4,882,128 to Hukvari et al. ).
  • Preferred mixers allow for direct steam injection into the contents of the mixer. All process steps noted below can be conducted while the tobacco material is being stirred or agitated.
  • the pressure within the mixing vessel during the process can be atmospheric pressure or elevated pressure (e.g., about 0.69 bar. (10 psig) to about 69 bars (1,000 psig)).
  • the moisture content of the moist tobacco material subjected to heat treatment is at least about 30 percent, often is at least about 35 percent, and frequently is at least about 40 percent, based on the total weight of the tobacco formulation being subjected to heat treatment.
  • the tobacco material can be moisturized by addition of aqueous fluids, such as steam, liquid tap water, aqueous solutions of sodium chloride, and the like.
  • aqueous fluids such as steam, liquid tap water, aqueous solutions of sodium chloride, and the like.
  • the moist tobacco material is contacted with a basic material (e.g., sodium carbonate, sodium bicarbonate, or a mixture thereof) in order to raise the pH to the alkaline pH range.
  • a basic material e.g., sodium carbonate, sodium bicarbonate, or a mixture thereof
  • the moisture content of the tobacco material is at least about 30 percent, often is at least about 35 percent, and frequently is at least about 40 percent, based on the total weight of the tobacco formulation.
  • the tobacco material is cooled somewhat prior to addition of the basic material thereto (e.g., the tobacco can be cooled to below about 75°C, frequently below about 65°C, and often below about 55°C).
  • the tobacco mixture is allowed to interact with the basic material while that tobacco material experiences a sufficiently high moisture level until the pH of the tobacco material drops to about 8 pH units. Then, the tobacco material is cooled and dried.
  • Exemplary flavorant compositions include various top dressing and casing compositions, including those compositions described in US Pat. Nos. 5,121,757 to White et al. ; 5,370,139 to Shu et al. ; 5,318,050 to Gonzalez-Parra et al. ; 5,343,879 to Teague ; 5,413,122 to Shu et al. ; 5,962,662 to Shu et al. ; 6,048,404 to White ; 6,298,858 to Coleman, III, et al. ; 6,325,860 to Coleman, III ; 6,428,624 to Coleman, III, et al.
  • the invention provides various processes for preparing a tobacco material for use in a smokeless tobacco product.
  • the methods of the invention involve heat treatment of the tobacco and adjustment of the pH of the tobacco in a manner adapted for improving the storage stability of the sensory characteristics of the smokeless tobacco product.
  • a tobacco material in a desired form e.g., shredded or particulate form
  • the tobacco material may comprise a blend of various tobacco types, such as a blend of various tobacco lamina materials (e.g., flue-cured lamina, Oriental lamina, and the like) and various stem materials (e.g., Rustica stem, Kurnool stem, Indian Sun-Cured stem, and the like).
  • the blend of tobacco materials is typically provided at a low moisture level, such as about 5 to about 15% by weight (e.g., about 10-12% by weight) based on the total weight of the tobacco material.
  • the tobacco material is preferably combined with a salt material, and the salt material is preferably in aqueous solution form.
  • an aqueous sodium chloride solution is added to the tobacco material and the resulting mixture typically has a moisture content of about 30 to about 50% by weight, often about 30 to about 40% by weight (e.g., 35% by weight).
  • the tobacco material can be heated while the sodium chloride or other salt material is added in order to aid thorough mixing of the salt solution with the tobacco material.
  • the heating can comprise heating the tobacco material to a temperature of at least about 60°C, typically about 60°C to about 65°C.
  • the moist tobacco material with optional salt component is then subjected to a heat treatment step, which involves heating the tobacco material for a time and at a temperature sufficient to pasteurize the tobacco as described above.
  • exemplary heating temperatures include temperatures of about 85°C or higher, such as about 85°C to about 100°C, more typically about 90°C to about 95°C.
  • the time of exposure to the pasteurization temperature can vary, but is typically at least about 1 hour, such as about 1 hour to about 3 hours.
  • the heating of the tobacco is conducted by both raising the jacket temperature of the mixer holding the tobacco material and direct steam injection into the tobacco material. The steam injection will also typically result in an increase in moisture content of the tobacco during the heating step.
  • the moisture content of the tobacco material is maintained during the heating step at essentially a constant moisture level or is allowed to rise slightly, such as a level of at least about 30% by weight, such as about 30% to about 40% by weight (e.g., about 35% by weight).
  • the tobacco is maintained in a relatively moist condition during the heating step.
  • the tobacco material is typically cooled prior to addition of a base intended to raise the pH of the material.
  • the temperature of the tobacco material is typically reduced to about 60°C to about 65°C.
  • a base is then added to the tobacco material and thoroughly mixed with the tobacco material.
  • the base can be any material capable of raising the pH of the tobacco material to an alkaline pH range (e.g., about 9 to about 10).
  • Exemplary bases include alkali metal hydroxides, alkali metal carbonates, alkali metal bicarbonates, and mixtures thereof.
  • Specific base materials that can be used include sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, potassium hydroxide, and mixtures thereof.
  • the base is typically added in the form of an aqueous solution and the base addition step typically results in an increase of moisture content of the tobacco material.
  • sufficient base is added to the tobacco material to result in a tobacco material pH of at least about 8.7, such as a pH of about 8.7 to about 10.
  • the final moisture content is often about 40% to about 55% by weight, frequently about 45% to about 50% by weight.
  • the resulting moist, pH-adjusted tobacco material is heated at an elevated temperature, such as a temperature of at least about 55°C, often at a temperature range of about 55°C to about 95°C, more often about 65°C to about 75°C.
  • an elevated temperature such as a temperature of at least about 55°C, often at a temperature range of about 55°C to about 95°C, more often about 65°C to about 75°C.
  • the moisture level of the tobacco material is held relatively constant or allowed to rise slightly in order to promote the continued reaction between the tobacco material and the base.
  • the moisture level of the tobacco material is preferably maintained at a level of at least about 40% by weight, and typically about 40% to about 55% by weight, frequently about 45% to about 50% by weight.
  • the mixing vessel containing the tobacco material is typically not vented to atmosphere, although a small flow of filtered air can be allowed to pass through the head space of the mixer to remove ammonia that forms as the base reacts with acidic materials in the tobacco material.
  • the heating step following base addition will typically continue for at least about 1 hour, and often will continue for about 1 to about 3 hours. During this step, it is preferable to allow the pH to drop to below about 8.5, such as about 8.0 to about 8.5 (e.g., about 8.1, about 8.2, about 8.3, about 8.4, or about 8.5).
  • about 8.0 to about 8.5 e.g., about 8.1, about 8.2, about 8.3, about 8.4, or about 8.5.
  • the rate of pH reduction is maintained at about 0.05 to about 0.15 pH units per hour, more typically about 0.08 to about 0.10 pH units per hour (e.g., about 0.09 pH units per hour).
  • the moist tobacco material is dried by continued heating of the tobacco material while the mixing vessel is allowed to vent such that water vapor is removed.
  • This step typically involves heating the tobacco material at a moderate elevated temperature, such as at a temperature of at least about 35°C, frequently at a temperature of about 35°C to about 70°C, more often about 55°C to about 65°C.
  • the length of the drying step can vary, but is typically about 20 to about 24 hours.
  • the final moisture content of the tobacco material following drying is often less than about 35% by weight, such as about 25% to about 35% by weight, frequently about 25% to about 30% by weight. It is advantageous to maintain the pH of the material during the drying step in the range of about 7.6 to about 8.2.
  • the tobacco material is initially mixed with a large excess of water to form a mixture having a relatively high moisture content, which can be characterized as a slurry, prior to heat treatment.
  • the slurry typically comprises at least about 75% by weight of water, and often at least about 80% by weight of water. In one embodiment, the tobacco material slurry comprises about 75% to about 95% by weight water.
  • the slurry is mixed with a salt material, such as an aqueous solution of sodium chloride.
  • the salt material is typically added in amount of about 1 to about 8% by weight (e.g., about 1 to about 3% by weight) of the tobacco material, based on the dry weight of the tobacco material.
  • the slurry is heated in order to pasteurize the tobacco material.
  • the heating step typically comprises heating the tobacco material slurry to a temperature of at least about 60°C, such as a temperature of about 60°C to about 100°C, more often about 70°C to about 90°C (e.g., about 75°C).
  • the time of heating can vary, but will typically be at least about 30 minutes, such as about 30 minutes to about 1 hour.
  • a base material is added.
  • the base material is typically in the form of an aqueous solution and the base can be any basic material such as those materials set forth above.
  • the base is added in an amount of about 3 to about 11% by weight based on the dry weight of the tobacco material.
  • Sufficient base is added to raise the pH of the slurry to an alkaline pH range, such as at least about 8.5, and typically at least about 9.0.
  • An exemplary pH range for the slurry following base addition is about 8.5 to about 11, more frequently about 9 to about 10.
  • the slurry is agitated and heated to an elevated temperature, such as a temperature of at least about 60°C, for a period of time sufficient to allow the pH of the slurry to drop at least about 0.5 pH units.
  • the time of heating will typically be at least about 1.5 hours, such as a range of about 1.5 hours to about 3.0 hours.
  • the temperature of the heating step will typically range from about 70°C to about 95°C.
  • the final pH of the slurry following this heating step will typically be in the range of about 8.0 to about 8.5 (e.g., about 8.1, about 8.2, about 8.3, about 8.4, or about 8.5).
  • the slurry can be cooled to ambient temperature, such as a temperature below about 35°C.
  • a humectant such as glycerol, propylene glycol, or sugar alcohol (e.g., maltitol syrup) can be added.
  • the tobacco material is then dried.
  • the drying step involved casting the slurry onto a belt (e.g., a stainless steel belt) and passing the tobacco through a drying zone operated at a temperature of about 85°C to about 285°C.
  • the typical resident time of the tobacco material in the drying zone is about 2 to about 5 minutes.
  • the belt speed through the drying zone or tunnel can range from about 7.6 to 16.8 m/s (about 25 to about 55 feet/min).
  • the final moisture content of the dried tobacco material is typically about 5 to about 15% by weight, often about 10 to about 12% by weight.
  • Tobacco material drying techniques are set forth, for example, in U.S. Pat. Nos. 4,941,484 to Clapp et al. ; 5,005,593 to Fagg et al. ; and 5,234,008 to Fagg .
  • a smokeless tobacco formulation is prepared using tobacco treated in a similar manner to that for a paper process reconstituted tobacco, such as described in US Pat Nos. 5,159,942 and 5,445,169 to Brinkley .
  • tobacco is subjected to an aqueous extraction at an elevated temperature in order to separate the tobacco material into a solids portion and an extract portion, wherein the extract portion typically has a relatively low solids content (e.g., about 3-6% solids).
  • the time and temperature of the extraction can vary, but typically the temperature is at least about 60°C, such as a temperature of about 60°C to about 100°C, more often about 70°C to about 90°C (e.g., about 75°C), and the time is typically about 30 minutes to about 1.5 hours.
  • the aqueous solution used to extract the tobacco material typically contains a salt and a base material, such as about 3 to about 8% by weight of a salt (e.g., sodium chloride) and about 1 to about 5% by weight of a base (e.g., sodium hydroxide), based on the weight of the tobacco.
  • a salt e.g., sodium chloride
  • a base e.g., sodium hydroxide
  • the extract is then preferably cooled down (e.g., cooled to about 65°C) and optionally neutralized by addition of a base (e.g., about 3.5% sodium hydroxide and about 3.5 % potassium carbonate by weight of tobacco).
  • a base e.g., about 3.5% sodium hydroxide and about 3.5 % potassium carbonate by weight of tobacco.
  • the pH of the extract can changes from about 9.0-9.5 to about 8.0-8.5.
  • the extract can be concentrated to form a concentrated extract with a relatively high solids content, such as about 30-35% solids, via vacuum evaporation, for example.
  • the concentrated extract is optionally mixed with a humectant (e.g., about 6% glycerin), and then added back to the extracted solids portion.
  • the resulting tobacco material can be dried to reduce the moisture content, such as to about 10 to about 12% moisture.
  • the drying step can be accomplished, for example, using a forced air oven at a temperature of about 85°C to about
  • the tobacco material is allowed to intimately mix with the base material in a moist environment for a time sufficient to encourage significant interaction between the base and acidic species within the tobacco. Significant drying of the tobacco is prevented until sufficient contact between the tobacco and base has occurred.
  • the above processes lead to greater storage stability of the sensory characteristics of the smokeless tobacco products formed using the tobacco materials treated according to these processes, and in particular, it is believed that greater pH storage stability of the final product can be achieved using the processes of the invention.
  • the resulting tobacco material can be mixed with additional flavorants, including sweeteners.
  • additional flavorants including sweeteners.
  • Various flavorants and water can be added as necessary to adjust flavor and moisture content such that the tobacco material exhibits the desired final moisture range for the product, which can vary as noted above.
  • the moisture content of the tobacco composition is raised to at least about 25% by weight in this step.
  • a typical toasting process which can occur either before or after the above-described heat treatment processes, comprises heating a relatively dry tobacco material (e.g., having a moisture content of about 5% to about 20% by weight) at an elevated temperature (about 85°C to about 300°C) for a time sufficient to toast the tobacco material, such as a period of about 1 to about 3 hours.
  • a relatively dry tobacco material e.g., having a moisture content of about 5% to about 20% by weight
  • an elevated temperature about 85°C to about 300°C
  • the tobacco can be mixed with a base and/or sugars (e.g., glucose, fructose, sucrose, high fructose corn syrup, caramel, rhamnose, or mixtures thereof), or sugar alcohols (e.g., maltitol, mannitol, xylitol, sorbitol, or mixtures thereof), prior to heating in order to promote Maillard reactions during heating.
  • sugars e.g., glucose, fructose, sucrose, high fructose corn syrup, caramel, rhamnose, or mixtures thereof
  • sugar alcohols e.g., maltitol, mannitol, xylitol, sorbitol, or mixtures thereof
  • Exemplary toasting conditions are set forth, for example, in U.S. Pat. Nos. 4,534,372 to White and 4,596,259 to White et al. ,.
  • the tobacco used for the manufacture of the tobacco product also can be processed, blended, formulated, combined and mixed with other materials or ingredients, including non-encapsulated amounts of any of the additives that can be used in the microcapsules discussed herein.
  • the tobacco composition can incorporate salts, sweeteners, binders, colorants, pH adjusters, fillers, oral care additives, flavoring agents, disintegration aids, antioxidants, humectants, and preservatives. See, for example, those representative components, combination of components, relative amounts of those components and ingredients relative to tobacco, and manners and methods for employing those components, set forth in U.S. Pat. App. Pub. Nos. 2007/062549 to Holton, et al. and 2007/186941 to Holton, et al. , each of which is incorporated herein by reference.
  • the relative amounts of the various components within the tobacco formulation may vary.
  • the amounts presented herein are total amounts of each type of additive, and can represent both encapsulated (or otherwise separated forms) and non-encapsulated components.
  • the smokeless tobacco products of the invention can include any of the various amounts of additive solely in the form of a microencapsulated or otherwise separated additive, solely in the form of a non-encapsulated additive, or in the form of a mixture of encapsulated and non-encapsulated additive.
  • a sweetener is most preferably employed in amounts sufficient to provide desired flavor attributes to the tobacco formulation.
  • a representative amount of sweetener whether an artificial sweetener and/or natural sugar, may make up at least about 1 percent to at least about 3 percent, of the total dry weight of the formulation.
  • the amount of sweetener within the formulation will not exceed about 40 percent, often will not exceed about 35 percent, and frequently will not exceed about 30 percent, of the total dry weight of the formulation.
  • a tobacco-containing microencapsulated (or otherwise separated) additive such as particulate tobacco or a tobacco extract, is preferably present in an amount sufficient to provide desired flavor attributes to the tobacco formulation.
  • the tobacco-containing microencapsulated additive is often present in an amount of at least about 5 percent of the total dry weight of the formulation, more typically at least about 10 percent.
  • the amount of tobacco-containing microencapsulated additive is typically less than about 50 weight percent, often less than about 40 weight percent, and frequently less than about 30 weight percent of the total dry weight of the formulation.
  • Embodiments including microencapsulated (or otherwise separated) water typically include an amount of water in microencapsulated form of at least about 10 percent, typically at least about 15 percent, and frequently at least about 20 percent, based on the total weight of the formulation.
  • the amount of microencapsulated water is typically less than about 35 percent, often less than about 30 percent, and frequently less than about 25 percent.
  • An additive derived from an herbal or botanical source is preferably employed in amounts sufficient to provide desired functional attributes to the tobacco formulation and the amount will vary depending on the desired function and the type of herbal or botanical source.
  • a representative amount of additive is at least about 1 percent to at least about 3 percent, of the total dry weight of the formulation.
  • the amount of additive within the formulation will not exceed about 40 percent, often will not exceed about 35 percent, and frequently will not exceed about 30 percent, of the total dry weight of the formulation.
  • a binder may be employed in amounts sufficient to provide the desired physical attributes and physical integrity to the tobacco formulation.
  • a representative amount of binder may make up at least about 1 percent to at least about 3 percent of the total dry weight of the formulation.
  • the amount of binder within the formulation will not exceed about 20 percent of the total dry weight of the formulation.
  • the amount of binder within a desirable formulation will not exceed about 15 percent, and frequently will not exceed about 10 percent, of the total dry weight of the formulation.
  • a disintegration aid may be employed in an amount sufficient to provide control of desired physical attributes of the tobacco formulation such as, for example, by providing loss of physical integrity and dispersion of the various component materials upon contact of the formulation with water (e.g., by undergoing swelling upon contact with water).
  • a representative amount of disintegration aid may make up at least about 1 percent to at least about 10 percent of the total dry weight of the formulation.
  • the amount of disintegration aid within the formulation will not exceed about 50 percent, and frequently will not exceed about 30 percent, of the total dry weight of the formulation.
  • a colorant may be employed in amounts sufficient to provide the desired visual attributes to the tobacco formulation.
  • a representative amount of colorant may make up at least about 1 percent to at least about 3 percent, of the total dry weight of the formulation.
  • the amount of colorant within the formulation will not exceed about 30 percent, and frequently will not exceed about 10 percent, of the total dry weight of the formulation.
  • a filler preferably is employed in amounts sufficient to provide control of desired physical attributes and sensory attributes to the tobacco formulation.
  • a representative amount of filler may make up at least about 5 percent to at least about 15 percent, of the total dry weight of the formulation.
  • the amount of filler within the formulation will not exceed about 60 percent, and frequently will not exceed about 40 percent, of the total dry weight of the formulation.
  • a buffering or pH adjusting agent may be employed in the tobacco formulation.
  • a representative amount of buffering or pH adjusting agent may make up at least about 1 percent to at least about 3 percent of the total dry weight of the formulation.
  • the amount of buffering or pH adjusting agent within the formulation will not exceed about 10 percent, and frequently will not exceed about 5 percent, of the total dry weight of the formulation.
  • a non-sweetener flavorant preferably is employed in amounts sufficient to provide desired sensory attributes to the tobacco formulation.
  • a representative amount of flavorant e.g., vanillin
  • the amount of flavoring ingredient will not exceed about 15 percent, and frequently will not exceed about 5 percent, of the total dry weight of the formulation.
  • a salt may be employed in amounts sufficient to provide desired sensory attributes to the tobacco formulation.
  • a representative amount of salt may make up at least about 1 percent to at least about 3 percent of the total dry weight of the formulation.
  • the amount of salt within the formulation will not exceed about 10 percent, and frequently does not exceed about 5 percent, of the total dry weight of the formulation.
  • An antioxidant may be employed in the tobacco formulation.
  • a representative amount of antioxidant may make up at least about 1 percent to at least about 3 percent, of the total dry weight of the formulation.
  • the amount of antioxidant within the formulation will not exceed about 25 percent, and frequently will not exceed about 10 percent, of the total dry weight of the formulation.
  • a preservative may be employed in the tobacco formulation.
  • a representative amount of preservative may make up at least about 0.1 percent to at least about 1 percent, of the total dry weight of the formulation.
  • the amount of preservative within the formulation will not typically exceed about 5 percent, and frequently will not exceed about 3 percent, of the total dry weight of the formulation.
  • the tobacco formulation can incorporate at least one oral care ingredient (or mixture of such ingredients) that provides the ability to inhibit tooth decay or loss, inhibit gum disease, relieve mouth pain, whiten teeth or otherwise inhibit tooth staining, elicit salivary stimulation, inhibit breath malodor, freshen breath, or the like.
  • oral care ingredient or mixture of such ingredients
  • effective amounts of ingredients such as thyme oil, eucalyptus oil and zinc (e.g., such as the ingredients of formulations commercially available as ZYTEX® from Discus Dental) can be incorporated into the formulation.
  • exemplary ingredients that can be incorporated in desired effective amounts within tobacco-containing formulations can include those that are incorporated within the types of oral care compositions set forth in Takahashi et al., Oral Microbiology and Immunology, 19(1), 61-64 (2004 ); US Pat. No. 6,083,527 to Thistle ; and US Pat. Appl. Pub. Nos. 2006/0210488 to Jakubowski and 2006/02228308 to Cummins et al.
  • Other exemplary ingredients of tobacco containing-formulation include those contained in formulations marketed as MALTISORB® by Roquette and DENTIZYME® by NatraRx.
  • a representative amount of oral care additive is at least about 1 percent, often at least about 3 percent, and frequently at least about 5 percent of the total dry weight of the formulation.
  • the amount of oral care additive within the formulation will not typically exceed about 30 percent, often will not exceed about 25 percent, and frequently will not exceed about 20 percent, of the total dry weight of the formulation.
  • Representative tobacco formulations may incorporate about 25 to about 60 percent tobacco, about 1 to about 5 percent artificial sweetener, about 1 to about 5 percent colorant, about 10 to about 60 percent organic and/or inorganic filler, about 5 to about 20 percent disintegrating aid, about 1 to about 5 percent binder, about 1 to about 5 percent pH-adjusting/buffering agent, flavoring ingredient in an amount of up to about 10 percent, preservative in an amount up to about 2 percent, and salt in an amount up to about 5 percent, based on the total dry weight of the tobacco formulation.
  • the particular percentages and choice of ingredients will vary depending upon the desired flavor, texture, and other characteristics.
  • the manner by which the various components of the tobacco formulation are combined may vary.
  • the various components of the formulation may be contacted, combined, or mixed together in conical-type blenders, mixing drums, ribbon blenders, or the like.
  • the overall mixture of various components with the powdered tobacco components may be relatively uniform in nature. See also, for example, the types of methodologies set forth in U.S. Pat. Nos. 4,148,325 to Solomon et al. ; 6,510,855 to Korte et al. ; and 6,834,654 to Williams , . Manners and methods for formulating snus-type tobacco formulations will be apparent to those skilled in the art of snus tobacco product production.
  • the tobacco composition most preferably is provided in a form that is characteristic of a snus type of product as described with reference to the accompanying drawings
  • the tobacco composition also can have the form of loose moist snuff, loose dry snuff, chewing tobacco, pelletized tobacco pieces, extruded tobacco strips or pieces, finely divided ground powders, finely divided or milled agglomerates of powdered pieces and components, flake-like pieces (e.g., that can be formed by agglomerating tobacco formulation components in a fluidized bed), molded processed tobacco pieces (e.g., formed in the general shape of a coin, cylinder, bean, cube, or the like), pieces of tobacco-containing gum, products incorporating mixtures of edible material combined with tobacco pieces and/or tobacco extract, products incorporating tobacco (e.g., in the form of tobacco extract) carried by a solid inedible substrate, and the like.
  • loose moist snuff loose dry snuff
  • chewing tobacco pelletized tobacco pieces, extrude
  • the tobacco composition can have the form of compressed tobacco pellets, multi-layered extruded pieces, extruded or formed rods or sticks, compositions having one type of tobacco formulation surrounded by a different type of tobacco formulation, rolls of tape-like films, readily water-dissolvable or water-dispersible films or strips (see, for example, US Pat. Appl. Pub. No. 2006/0198873 to Chan et al. ), or capsule-like materials possessing an outer shell (e.g., a pliable or hard outer shell that can be clear, colorless, translucent or highly colored in nature) and an inner region possessing tobacco or tobacco flavor (e.g., a Newtoniam fluid or a thixotropic fluid incorporating tobacco of some form).
  • an outer shell e.g., a pliable or hard outer shell that can be clear, colorless, translucent or highly colored in nature
  • an inner region possessing tobacco or tobacco flavor e.g., a Newtoniam fluid or a thixotropic fluid incorporating tobacco of
  • Processed tobacco compositions such as compressed tobacco pellets can be produced by compacting granulated tobacco and associated formulation components, compacting those components in the form of a pellet, and optionally coating each pellet with an overcoat material.
  • Exemplary granulation devices are available as the FL-M Series granulator equipment (e.g., FL-M-3) from Vector Corporation and as WP 120V and WP 200VN from Alexanderwerk, Inc.
  • Exemplary compaction devices such as compaction presses, are available as Colton 2216 and Colton 2247 from Vector Corporation and as 1200i, 2200i, 3200, 2090, 3090 and 4090 from Fette Compacting.
  • Devices for providing outer coating layers to compacted pelletized tobacco formulations are available as CompuLab 24, CompuLab 36, Accela-Cota 48 and Accela-Cota 60 from Thomas Engineering.
  • Processed tobacco compositions can be manufactured using a wide variety of extrusion techniques.
  • multi-layered tobacco pellets can be manufactured using coextrusion techniques (e.g., using a twin screw extruder).
  • coextrusion techniques e.g., using a twin screw extruder
  • successive wet or dry components or component mixtures can be placed within separate extrusion hoppers.
  • Steam, gases (e.g., ammonia, air, carbon dioxide, and the like), and humectants e.g., glycerin or propylene glycol
  • the various components are processed so as to be very well mixed, and hence, come in complete contact with each other.
  • the contact of components is such that individual components can be well embedded in the extrusion matrix or extrudate.
  • Multilayered materials can have the general form of films, and alternatively, multi-layered generally spherical materials can possess various layers extending from the inside outward.
  • Certain tobacco compositions can incorporate tobacco as the major component thereof.
  • those compositions do not, to any substantial degree, leave any residue in the mouth of the user thereof.
  • those compositions do not provide the user's mouth with slick or slimy sensation (e.g., due to overly high levels of binding agents).
  • Tobacco materials during processing, can be treated with pH adjusters or other suitable agents, so that natural pectins within the tobacco material can be released. Release of natural tobacco pectin can act to reduce the amount of additional gums/hydrocolloids, cellulose-derived, or starch-based binders needed to aid in desired sheet or film tensile strength qualities.
  • fine tobacco powder is cooked in an alkaline pH adjusted solution at elevated temperatures relative to ambient.
  • Such treatment also can provide desirable sensory attributes to the tobacco material. See, for example, US Pat. Nos. 5,099,864 to Young et al. ; 5,339,838 to Young et al. ; and 5,501,237 to Young et al. ,.
  • a representative type of tobacco formulation possesses an outer shell and an inner region in the form of a tobacco formulation.
  • a representative outer shell can be provided by providing a liquid mixture of alginates (e.g., sodium alginates available as Kelvis, Kelgin and Mannucol from International Specialty Products Corp.), rice starch, sucralose, glycerin and flavoring agent (e.g., mint flavor) in water so as to provide a liquid mix exhibiting a Brookfield viscosity at 25°C of about 20,000 to about 25,000 centipoise.
  • alginates e.g., sodium alginates available as Kelvis, Kelgin and Mannucol from International Specialty Products Corp.
  • rice starch e.g., a starch
  • sucralose e.g., glycerin
  • flavoring agent e.g., mint flavor
  • That viscous mixture can be used to form a sheet that can be formed into an outer layer (e.g., using a Villaware Imperia Pasta Machine, Dough Roller 150 equipped with a Villaware Ravioli Attachment for Imperia 150-25, each of which is available through Imperia Trading Company) or semi-circular shells that can be combined (e.g., by exposure to heat) to form an outer layer.
  • an outer layer e.g., using a Villaware Imperia Pasta Machine, Dough Roller 150 equipped with a Villaware Ravioli Attachment for Imperia 150-25, each of which is available through Imperia Trading Company
  • semi-circular shells that can be combined (e.g., by exposure to heat) to form an outer layer.
  • such a viscous mixture can be suitably dried by heating at about 60°C for about 1 hour. Inside that outer shell can be incorporated a wide variety of tobacco formulations.
  • One representative tobacco formulation used as the inner region of such a is a dry or moist mixture of granulated or milled tobacco material that can be mixed with other ingredients, such as flavoring agents, humectants, fillers, pH adjusters, dispersion aids, and the like.
  • One representative tobacco formulation has the form of a gel or soft gel. That tobacco formulation can be provided by mixing granulated or milled tobacco material, kappa-carageenan, Kelvis-type sodium alginate, propylene glycol and flavoring agent (e.g., menthol and cinnamon) in water, such that the moisture content of the formulation is about 40 to about 50 weight percent.
  • One representative tobacco formulation has the form of a fluid.
  • That tobacco formulation can be provided by mixing granulated or milled tobacco material, glycerin, propylene glycol, kappa-carageenan, carboxymethycellulose available as Ticalose 1500 from TIC Gums and micro-crystalline cellulose (e.g., Ticacel HV from TIC Gums) in water, such that the moisture content of the formulation is about 60 to about 70 weight percent.
  • the tobacco in the form of a pellet or other processed form, it may be desirable to treat the tobacco material in the smokeless tobacco product with a bleaching or oxidizing agent in order to alter the color of the tobacco material.
  • a bleaching or oxidizing agent in order to alter the color of the tobacco material.
  • Exemplary bleaching agents include hydrogen peroxide, ozone, and ammonia. Processes for treating tobacco with bleaching agents are discussed, for example, in US Pat. Nos. 787,611 to Daniels, Jr.
  • the type of pouch used to contain the tobacco formulation can vary, and in fact, in certain embodiments, a pouch may be unnecessary.
  • tobacco formulations having the form of a tobacco pellet or other processed form already sized for individual use may not require containment in the form of a pouch. Instead, the pellets or other processed forms of the tobacco formulation could be simply packaged in an outer container without using a pouch to divide the tobacco formulation into individual serving sizes.
  • Suitable packets, pouches or containers of the type used for the manufacture of smokeless tobacco products are available under the tradenames "taboka,” CatchDry, Ettan, General, Granit, Goteborgs Rape, Grovsnus White, Metropol Kaktus, Mocca Anis, Mocca Mint, Mocca Wintergreen, Kicks, Probe, Prince, Skruf, TreAnkrare, Camel Snus Original, Camel Snus Frost and Camel Snus Spice.
  • the tobacco formulation may be contained in pouches and packaged, in a manner and using the types of components used for the manufacture of conventional snus types of products.
  • the pouch or fleece provides a liquid-permeable container of a type that may be considered to be similar in character to the mesh-like type of material that is used for the construction of a tea bag. Components of the loosely arranged, granular tobacco formulation readily diffuse through the pouch and into the mouth of the user.
  • an exemplary pouch may be manufactured from materials, and in such a manner, such that during use by the user, the pouch is undergoes a controlled dispersion or dissolution.
  • Such pouch materials may have the form of a mesh, screen, perforated paper, permeable fabric, or the like.
  • pouch material manufactured from a mesh-like form of rice paper, or perforated rice paper may dissolve in the mouth of the user.
  • the pouch and tobacco formulation each may undergo complete dispersion within the mouth of the user during normal conditions of use, and hence the pouch and tobacco formulation both may be ingested by the user.
  • exemplary pouch materials may be manufactured using water dispersible film forming materials (e.g., binding agents such as alginates, carboxymethylcellulose, xanthan gum, pullulan, and the like), as well as those materials in combination with materials such as ground cellulosics (e.g., fine particle size wood pulp).
  • Preferred pouch materials though water dispersible or dissolvable, may be designed and manufactured such that under conditions of normal use, a significant amount of the tobacco formulation contents permeate through the pouch material prior to the time that the pouch undergoes toss of its physical integrity.
  • flavoring ingredients, disintegration aids, and other desired components may be incorporated within, or applied to, the pouch material.
  • Snus types of products can be manufactured using equipment such as that available as SB 51-1/T, SBL 50 and SB 53-2/T from Merzmaschinen GmBH, which may be suitably modified with a capsule insertion apparatus of the general type set forth in U.S. Pat. Pub. No. 2007/0068540 to Thomas et al.
  • Snus pouches can be provided as individual pouches, or a plurality of pouches (e.g., 2, 4, 5, 10, 12, 15, 20, 25 or 30 pouches) can connected or linked together (e.g., in an end-to-end manner) such that a single pouch or individual portion can be readily removed for use from a one-piece strand or matrix of pouches.
  • the pouches containing the tobacco formulation are preferably packaged in an outer container that is sealed tightly, and is composed of a suitable material, such that the atmospheric conditions within that sealed package are modified and/or controlled. That is, the sealed package can provide a good barrier that inhibits the passage of compositions such as moisture and oxygen therethrough.
  • the atmosphere within the sealed package can be further modified by introducing a selected gaseous species (e.g., nitrogen, argon, or a mixture thereof) into the package prior to sealing.
  • a selected gaseous species e.g., nitrogen, argon, or a mixture thereof
  • the present invention can involve the use of equipment, materials, methodologies and process conditions that are suitably modified in order to provide the packaging and controlled atmospheric conditions for the tobacco products that are packaged pursuant thereto.
  • the atmosphere within the packaging materials can be modified in a variety of ways. For example, a significant amount of the atmosphere within the package can be removed (e.g., by using vacuum packaging types of techniques), or the atmosphere within the package can be altered in a controlled manner (e.g., by using gas flushing types of techniques).
  • the controlled or modified atmospheres within packaged tobacco products of the present invention can vary.
  • tobacco product is vacuum packed or flushed so as to have a controlled or modified atmosphere (e.g., even if the atmosphere is controlled in a manner such that the atmospheric pressure within the sealed package is at a positive pressure relevant to ambient atmospheric pressure)
  • atmospheric conditions within the package are controlled such that a significant amount, and most preferably virtually all of the oxygen present within with package, is removed from that package prior to the time that the package is sealed. That is, less than about 8 percent, and often less than about 6 percent, of the weight of the controlled atmosphere initially present with a sealed outer package is composed of oxygen.
  • the atmosphere present within the package preferably can possess less than about 5 percent oxygen, and most preferably between about 1 percent oxygen and about 5 percent oxygen, based on the weight of the controlled atmosphere initially present within that sealed package.
  • a gaseous species e.g., a selected gas or mixture of gases
  • a significant amount, and most preferably virtually all, of the atmosphere within the sealed package is provided by the desired gaseous species.
  • gaseous species include nitrogen, argon, carbon dioxide, and the like (e.g., high purity gases that are greater than about 99 percent pure, by weight).
  • the atmosphere to which the tobacco product incorporates a relatively high level of a desired gaseous species (e.g., oxygen) in order to introduce the effects of "gas shock" to the tobacco product can be desirable for the introduction of "oxygen shock” for purposes of inhibiting enzymatic discoloration, preventing anaerobic fermentation reactions, and inhibiting aerobic and anaerobic microbial growth).
  • a controlled atmosphere containing an amount of oxygen such that the level of oxygen in that atmosphere greater than about 25 percent by weight, often greater than about 30 percent by weight, can provide conditions suitable for introduction of oxygen shock.
  • Representative equipment useful for carrying out process steps associated with the packaging processes described herein is available from Winpak Ltd. (e.g., systems identified as LD32, L25, L18 and L12); as Linium 300 Series horizontal flow wrapping systems from Doboy Inc. (e.g., Linium Model Nos. 301, 302, 303, 304 or 305); as Hiwrap 504 systems available from Hitech Systems s.r.l.; and as the types of systems available from Rovemamaschinen GmbH.
  • Preferred equipment provides a wrapping material that provides a seal that does not allow passage of gases or moisture therethrough (e.g., a seal that might be considered as "air tight").
  • the pouches containing the tobacco formulation can be packaged within a sealed hard container that serves as the outermost package or container.
  • a representative hard container is the short, rounded edge, generally cylindrical container traditionally used for the marketing of snus types of products. See, for example, the types of representative snuff-box types of designs set forth in PCT WO 2005/016036 to Bjorkholm .
  • Other types of containers that can be suitably modified are plastic or metal type containers set forth in US Pat. No. 7,014,039 to Henson et al. See, also, the types of hard containers used for the commercial distribution of Camel Snus by R. J.
  • the type of container used for the "toboka” product can be adapted to possess a slidable tip lid (e.g., that slides generally parallel to the longitudinal axis of the container) in order that the container can be opened and closed.
  • the container can have an accordion or bellows type of design; and as such, the container can be extended open for filling with smokeless tobacco product during production, and then contracted after filling of the container is complete.
  • containers can be equipped with suitable seals or grommets, such that when an opened container is re-shut, a good seal is provided.
  • the hard container In use, the hard container is opened, the outer package is opened, a pouch is removed therefrom, and the pouch is enjoyed by the consumer.
  • the hard container is manually resealed, and additional pouches are removed from that container by the consumer as desired.
  • the amount of tobacco formulation incorporated within each sealed outer package can vary.
  • loose tobacco composition can be incorporated into an outer package, the package is sealed, and that loose tobacco can be used as loose snuff or chewing tobacco when the outer package is opened.
  • tobacco composition contained within a snus-type pouch or packet is incorporated within the outer package, the package is sealed, and the snus-type product can be used when the outer package is opened.
  • the amount of tobacco formulation within each individual portion is such that there is at least about 50 mg, often at least about 150 mg, and frequently at least about 250 mg, of dry weight tobacco; and less than about 700 mg, often less than about 500 mg, and frequently less than about 300 mg, of dry weight tobacco.
  • snus-type smokeless tobacco products can have the form of so-called "portion snus.”
  • the amount of tobacco formulation within each pouch is between about 100 mg and about 400 mg.
  • One exemplary snus-type product possesses about 1 g of a tobacco formulation having a moisture content of about 35 weight percent; which tobacco formulation is contained in a sealed fleece pouch having an overall length of about 30 mm, a width of about 16 mm, and a height of about 5 mm, wherein the length of the compartment area of that pouch is about 26 mm due to a seal of about 2 mm width at each end of that pouch.
  • Another exemplary snus-type product possesses about 0.5 g of a tobacco formulation having a moisture content of about 35 weight percent; which tobacco formulation is contained in a sealed fleece pouch having an overall length of about 26 mm, a width of about 12 mm, and a height of about 5 mm, wherein the length of the compartment area of that pouch is about 22 mm due to a seal of about 2 mm width at each end of that pouch.
  • Products of the present invention may be packaged and stored in much the same manner that conventional types of smokeless tobacco products are packaged and stored.
  • a plurality of packets or pouches may be contained in a cylindrical container.
  • moist tobacco products e.g., products having moisture contents of more than about 20 weight percent
  • relatively dry tobacco products e.g., products having moisture contents of less than about 15 weight percent
  • relatively dry tobacco products often may be stored under a relatively wide range of temperatures.
  • a moist tobacco formulation suitable for use as a snus type of smokeless tobacco product is provided in the following manner.
  • a pre-blend of several lamina components is made and metered into an AeroFlex Model A115 flexible screw conveyor (Vac-U-Max Company, Belleville, NJ).
  • the flexible screw feeder discharges directly to a Fitzmill Comminutor hammer mill (Fitzpatrick, Elmhurst IL) utilizing a concave with 0.125 inch diameter holes.
  • the milled lamina is then pneumatically conveyed to a Rotex Model 44 screener (Rotex Corporation, Cincinnati, OH) with 2 screens - an 18 Tyler mesh and a 60 Tyler mesh.
  • the material that does not pass through the 18 mesh screen is conveyed back into the infeed hopper for further milling and the material passing the 60 mesh is discarded.
  • the material that passes the 18 mesh and is retained on the 60 mesh is gravity discharged into a container for further use in the process.
  • a plurality of stem fractions (Rustica, Kurnool, and Indian Sun Cured) is milled separately to the same size as the lamina using the same equipment noted above.
  • the tobacco is heated by passing heated water at 97°C through the water jacket on the Scott Mixer to obtain a tobacco temperature of 65°C prior to applying the first casing.
  • Mixer shaft speed is 73 rpm during the heating step.
  • Sodium chloride and water are placed in a Breddo Likwifier Model LORWW mixer and mixed for a minimum time of 3 minutes.
  • the casing is then pumped into the mixer via an ARO air operated Diaphragm pump at a flow rate of 4 gpm.
  • the casing is introduced into the Scott Mixer via a Spraying Systems Corporation Model 1 ⁇ 2 GD SS-16 hydraulic atomizing nozzle.
  • the mixer speed is 73 rpm and the tobacco temperature is controlled at 65°C during this step by applying either hot water or chilled water to the mixer water jacket.
  • the mixer runs for a minimum of 10 minutes to ensure proper mixing of the first casing and the tobacco.
  • Tobacco moisture at the end of this step is 35.95% with a pH of 5.30.
  • the temperature set point on the water jacket is raised to 88°C to minimize condensation during the heating phase.
  • Steam is directly injected into the Scott mixer via two nozzles, one mounted on each end of the vessel. The steam is injected to raise and maintain the tobacco temperature to at least 93°C and is held at this temperature for a minimum of 60 minutes.
  • Mixer speed is 10 rpm during this step.
  • Tobacco moisture at the end of this step is 40.23% with a pH of 5.22.
  • the tobacco is cooled to 65°C prior to applying the second casing.
  • the cooling step is accomplished by both evaporative and convective cooling.
  • a fan is utilized to introduce filtered room air at ambient temperature into the Scott Mixer in order to evaporatively cool the tobacco and chilled water at a temperature of 3°C is introduced to the water jacket to also cool the tobacco.
  • Mixer speed is 10 rpm during this step.
  • a second casing solution comprising water and sodium carbonate is placed in a Breddo Likwifier Model LORWW mixer and mixed for a minimum time of 3 minutes.
  • the casing is then pumped into the mixer via an ARO air operated Diaphragm pump at a flow rate of 4 gpm.
  • the casing is introduced into the Scott Mixer via a Spraying Systems Corporation Model 1 ⁇ 2 GD SS-16 hydraulic atomizing nozzle.
  • the mixer speed is 73 rpm and the tobacco temperature is controlled at 65°C during this step by applying either hot water or chilled water to the mixer water jacket.
  • the mixer runs for a minimum of 5 minutes to ensure proper mixing of the second casing and the tobacco.
  • the tobacco moisture at the end of this step is 51.62% with a pH of 8.72.
  • the Scott mixer After addition of the second casing, the Scott mixer is held at a constant 71°C temperature for 2 hours using the water jacket. A small flow of filtered air is passed through the Scott Mixer to purge the head space. Mixer speed is 10 rpm during this step. Tobacco moisture at the end of this step is 49.36% with a pH of 8.34.
  • the batch is dried at a constant 38°C for a period of 20 hours by passing hot water at 54°C through the water jacket and passing filtered air through the Scott Mixer.
  • Mixer speed is 10 rpm during this step.
  • Tobacco moisture at the end of this step is 31.08% with a pH of 7.90.
  • the tobacco After drying, the tobacco is cooled to 29°C prior to applying the third casing by passing chilled water at 3°C through the water jacket. Mixer speed is 10 rpm during this step. Tobacco moisture at the end of this step is 30.85% with a pH of 7.89.
  • the third casing solution which comprises a sweetener, is placed in a Breddo Likwifier Model LORWW mixer and mixed for a minimum time of 3 minutes.
  • the casing is then pumped into the mixer via an ARO air operated Diaphragm pump at a flow rate of 4 gpm.
  • the casing is introduced into the Scott Mixer via a Spraying Systems Corporation Model 1 ⁇ 2 GD SS-16 hydraulic atomizing nozzle.
  • Mixer speed is 73 rpm and the tobacco temperature is controlled at 29°C during this step by passing chilled water through the mixer water jacket.
  • the mixer runs for a minimum of 15 minutes to ensure proper mixing of the third casing and the tobacco.
  • Tobacco moisture at the end of this step is 34.23% with a pH of 7.87.
  • the tobacco After applying the third casing, the tobacco is maintained at 29°C by passing chilled water at 3°C through the water jacket. Mixer speed is 10 rpm during this step. Tobacco moisture at the end of this step is 34.23% with a pH of 7.87.
  • a top dressing flavorant material is placed in a pressurized blow pot.
  • the top dressing is then pumped into the mixer via air pressure on the blow pot at a flow rate of 4 gpm.
  • the top dressing is introduced into the Scott Mixer via a Spraying Systems Corporation Model 1 ⁇ 2 GD SS-16 hydraulic atomizing nozzle.
  • Mixer speed is 73 rpm and the tobacco temperature is controlled at 29°C during this step by passing chilled water through the mixer water jacket.
  • the mixer runs for a minimum of 15 minutes to ensure proper mixing of the top dressing and the tobacco.
  • Tobacco moisture at the end of this step is 36.53% with a pH of 7.84.
  • the resulting product is stored at 3°C and is ready for pouching.
  • a moist tobacco formulation suitable for use as a snus type of smokeless tobacco product is provided in the following manner.
  • a dry, milled tobacco material blend as set forth in Example 1 is provided.
  • water can be provided in the form of water at ambient temperature or heated.
  • the water can incorporate ingredients dispersed or dissolved therein.
  • a solution of sodium chloride dissolved in water can be added to the dry tobacco mixture in an amount sufficient to achieve an amount of sodium chloride in the tobacco material of about 1 to about 8% by weight, based on the dry weight of the tobacco.
  • sufficient water is added to the tobacco mixture such that the tobacco mixture is in slurry form and has a moisture content of 1 weight part tobacco to about 4 to about 10 weight parts waters (e.g., 1 part tobacco:4 to 5 part water).
  • the tobacco material slurry is heated to about 75°C and mixed at a speed of 24 rpm. Then, the convective and conductive heating of the tobacco mixture is complemented by the addition of steam to the mixture. In particular, steam is blown into contact with the tobacco mixture using nozzles present in the mixer. The temperature of the mixture is held at about 75°C for about 30 minutes to about 45 minutes, while still being mixed at 24 rpm.
  • the moisture content of the tobacco slurry can be controlled during steam treatment by control of the jacket temperature. For example, lowering the jacket temperature during steam treatment can increase the moisture content of the tobacco mixture.
  • a base such as potassium or sodium hydroxide
  • potassium hydroxide is added to the tobacco slurry in the form of an aqueous solution.
  • concentration of potassium hydroxide of about 6% to about 8% by weight, based on the dry weight to of the tobacco.
  • the mixture is maintained at an elevated temperature of about 75°C for about 1.5 hours to 3 hours. During that period, the pH of the mixture drops to about 8.2 to about 8.3.
  • the tobacco slurry is cooled to ambient temperature and, during cooling, glycerol is added in an amount of about 3 to about 8%, based on the dry weight of the tobacco.
  • the resulting mixture is cast onto a hot aluminum or stainless steel belt and dried to a moisture content of about 10-12% by weight by passing the tobacco material through a drying zone operated at a temperature of 85°C to 285°C.
  • the resulting dried tobacco material is placed within a mixer and water and a sweetener are added in order to raise the moisture level to at least about 30% by weight.
  • a final top dressing flavorant is sprayed onto the moist tobacco.
  • the resulting tobacco is cooled to ambient temperature, stored at 3°C, and is ready for pouching.
  • a moist tobacco formulation suitable for use as a snus type of smokeless tobacco product is provided in the following manner.
  • Tobacco is treated in a similar manner to that for a paper process reconstituted tobacco, such as described in US Pat Nos. 5,159,942 and 5,445,169 to Brinkley , with some modification.
  • Tobacco (1 part) is subjected to an aqueous extraction (11 parts water) at 75° C for about 45 min by mixing at 24 rpm, and the solids/fibers are separated by centrifugation from the weak extract (about 3-6% solids).
  • the aqueous solution used to extract the tobacco contains about 3.5 % salt (sodium chloride) and about 1% base (sodium hydroxide) by weight of tobacco.
  • the weak extract is cooled down to about 65°C and then neutralized by addition of a base (e.g., about 3.5% sodium hydroxide and about 3.5 % potassium carbonate by weight of tobacco), while mixing at a speed of 10 rpm for about 1.5 h or more.
  • a base e.g., about 3.5% sodium hydroxide and about 3.5 % potassium carbonate by weight of tobacco
  • the pH of the extract changes from about 9.2 to about 8.2, after which the weak extract is concentrated to an about 30-35% solids strong extract via vacuum evaporation.
  • the strong extract is mixed with about 6% glycerin humectant, and then added back to the extracted fibers, before being dried to about 10 to about 12% moisture in a forced air oven (at a temperature of about 85 to about 100° C).
  • the resulting dried tobacco material is placed within a mixer and water and a sweetener are added in order to raise the moisture level to at least about 30% by weight.
  • a final top dressing flavorant is sprayed onto the moist tobacco.
  • the resulting tobacco is cooled to ambient temperature, stored at 3°C, and is ready for pouching.
  • a smokeless tobacco product configured for insertion into the mouth of a user of the product, the tobacco product comprising a water-permeable pouch containing a tobacco formulation, the tobacco formulation comprising a tobacco material and a plurality of microcapsules dispersed within said tobacco material, the plurality of microcapsules comprising an outer shell encapsulating an internal payload, wherein the outer shell of the microcapsules is rupturable such that rupture of the outer shell exposes the payload to the tobacco material, and wherein the internal payload comprises at least one additive selected from the group consisting of binders, colorants, pH adjusters, buffering agents, fillers, disintegration aids, humectants, antioxidants, oral care ingredients, preservatives, vanillin in a complexed form, and mixtures thereof.
  • a smokeless tobacco product wherein the payload of the microcapsules comprises vanillin in a complexed form.
  • a smokeless tobacco product wherein the payload of the microcapsules comprises a filler material.
  • a smokeless tobacco product wherein the filler material comprises a vegetable fiber material.
  • a smokeless tobacco product wherein the filler material comprises a sugar beet fiber material.
  • a smokeless tobacco product wherein the payload of the microcapsules comprises a buffering agent.
  • a smokeless tobacco product wherein the buffering agent buffers within a pH range of about 6 to about 10.
  • a smokeless tobacco product wherein the payload of the microcapsules further comprises a tobacco-containing flavorant.
  • a smokeless tobacco product wherein the tobacco-containing flavorant comprises a tobacco extract or a particulate tobacco material.
  • a smokeless tobacco product wherein the payload of the microcapsules further comprises a sweetener comprising neotame.
  • a smokeless tobacco product wherein the payload of the microcapsules further comprises an additive derived from an herbal or botanical source.
  • a smokeless tobacco product wherein the outer shell of the microcapsules is water-soluble under conditions of at least about 45 weight percent moisture, based on the total weight of the smokeless tobacco product.

Claims (13)

  1. Verfahren zur Herstellung einer Tabakzusammensetzung, welche zur Verwendung als rauchlose Tabakzusammensetzung geeignet ist, umfassend:
    Bereitstellen einer Mischung von Wasser und einem Tabakmaterial in Form einer Aufschlämmung;
    Erwärmen der Mischung bei einer Temperatur und für eine Zeit, die ausreichend sind, um die Mischung zu pasteurisieren;
    Zugabe einer Base zu der Aufschlämmung in einer Menge, die ausreichend ist, um den pH-Wert der Aufschlämmung auf einen alkalischen pH-Wert anzuheben, so dass eine pH-eingestellte Mischung gebildet wird;
    Weitererwärmen der pH-eingestellten Mischung bei einer Temperatur und für eine Zeit, die ausreichend sind, damit der pH-Wert der pH-eingestellten Mischung mindestens ungefähr 0,5 pH-Einheiten fällt, im Anschluss an den Zugabeschritt, um ein behandeltes Tabakmaterial zu bilden; und
    Inkorporieren des behandelten Tabakmaterials in ein rauchloses Tabakprodukt.
  2. Verfahren nach Anspruch 1, umfassend:
    Bereitstellen einer Aufschlämmung, umfassend Wasser und ein Tabakmaterial, wobei die Aufschlämmung mindestens ungefähr 75 Gew.% Wasser, basierend auf dem Gesamtgewicht der Aufschlämmung, umfasst;
    Erwärmen der Aufschlämmung auf eine Temperatur von mindestens ungefähr 60 °C für eine Zeit, die ausreichend ist, um das Tabakmaterial zu pasteurisieren;
    Zugabe einer Base zu der Aufschlämmung in einer Menge, die ausreichend ist, um den pH-Wert der Aufschlämmung auf mindestens ungefähr 8,5 anzuheben, so dass eine pH-eingestellte Aufschlämmung gebildet wird; und
    Weitererwärmen der pH-eingestellten Aufschlämmung auf eine Temperatur von mindestens ungefähr 60 °C für eine Zeit, die ausreichend ist, damit der pH-Wert der Aufschlämmung mindestens ungefähr 0,5 pH-Einheiten fällt, im Anschluss an den Zugabeschritt.
  3. Verfahren nach Anspruch 2, ferner umfassend den Schritt des Zugebens eines Salzes zu der Aufschlämmung vor dem Schritt des Erwärmens.
  4. Verfahren nach Anspruch 3, wobei der Schritt des Zugebens eines Salzes umfasst: Zugabe von ungefähr 1 bis ungefähr 5 Gew.% Natriumchlorid, basierend auf dem Trockengewicht des Tabakmaterials.
  5. Verfahren nach einem der Ansprüche 2 bis 4, ferner umfassend: Abkühlen der Aufschlämmung auf eine Temperatur von weniger als ungefähr 35 °C.
  6. Verfahren nach Anspruch 5, umfassend den Schritt des Zugebens eines Feuchthaltemittels während oder nach dem Schritt des Abkühlens.
  7. Verfahren nach einem der Ansprüche 2 bis 6, ferner umfassend den Schritt des Trocknens der Aufschlämmung auf einen Feuchtegehalt von nicht mehr als ungefähr 15 Gew.%, basierend auf dem Gesamtgewicht des getrockneten Tabakmaterials.
  8. Verfahren nach Anspruch 7, ferner umfassend den Schritt des Zugebens von einem oder mehreren Flavour-Agenzien und zusätzlicher Feuchte zu dem getrockneten Tabakmaterial in einer Menge, die ausreichend ist, um den Feuchtegehalt des Tabakmaterials auf mindestens ungefähr 25 Gew.% anzuheben.
  9. Verfahren nach einem der Ansprüche 2 bis 8, wobei der Schritt des Zugebens umfasst: Hinzugeben von ausreichend Base, um den pH-Wert der Aufschlämmung auf mindestens ungefähr 9 anzuheben.
  10. Verfahren nach einem der Ansprüche 1 bis 8, umfassend:
    Bereitstellen einer Mischung von Wasser, einem Tabakmaterial und einem Salz in Form einer Aufschlämmung;
    Erwärmen der Mischung bei einer Temperatur und für eine Zeit, die ausreichend sind, um das Tabakmaterial zu pasteurisieren;
    Zugabe einer Base zu der Aufschlämmung in einer Menge, die ausreichend ist, um den pH-Wert der Aufschlämmung auf mindestens ungefähr 8,5 anzuheben, so dass eine pH-eingestellte Aufschlämmung gebildet wird; und
    Weitererwärmen der pH-eingestellten Mischung bei einer Temperatur und für eine Zeit, die ausreichend sind, damit der pH-Wert der pH-eingestellten Mischung mindestens ungefähr 0,5 pH-Einheiten fällt, im Anschluss an den Zugabeschritt, um ein behandeltes Tabakmaterial zu bilden.
  11. Verfahren nach einem der Ansprüche 1 bis 10, umfassend:
    Bereitstellen einer Aufschlämmung, umfassend Wasser und ein Tabakmaterial, wobei die Aufschlämmung mindestens ungefähr 80 Gew.% Wasser, basierend auf dem Gesamtgewicht der Aufschlämmung, umfasst;
    Erwärmen der Aufschlämmung auf eine Temperatur von mindestens ungefähr 70 °C für eine Zeit, die ausreichend ist, um das Tabakmaterial zu pasteurisieren;
    Zugabe einer Base zu der Aufschlämmung in einer Menge, die ausreichend ist, um den pH-Wert der Aufschlämmung auf mindestens ungefähr 9 anzuheben, so dass eine pH-eingestellte Aufschlämmung gebildet wird;
    Weitererwärmen der pH-eingestellten Aufschlämmung auf eine Temperatur von mindestens ungefähr 60 °C für eine Zeit, die ausreichend ist, damit der pH-Wert der Aufschlämmung mindestens ungefähr 0,5 pH-Einheiten fällt, im Anschluss an den Zugabeschritt; und
    Abkühlen der pH-eingestellten Aufschlämmung auf ungefähr Umgebungstemperatur, wobei die pH-eingestellte Aufschlämmung zu der Zeit, zu der der Schritt des Abkühlens beginnt, einen pH-Wert von mindestens ungefähr 8 aufweist.
  12. Verfahren nach einem der Ansprüche 1 bis 11, umfassend:
    Bereitstellen einer Aufschlämmung, umfassend Wasser und ein Tabakmaterial, wobei die Aufschlämmung mindestens ungefähr 80 Gew.% Wasser, basierend auf dem Gesamtgewicht der Aufschlämmung, umfasst;
    Erwärmen der Aufschlämmung auf eine Temperatur von mindestens ungefähr 70 °C für mindestens ungefähr 30 Minuten;
    Zugabe einer Base zu der Aufschlämmung in einer Menge, die ausreichend ist, um den pH-Wert der Aufschlämmung auf mindestens ungefähr 9,5 anzuheben, so dass eine pH-eingestellte Aufschlämmung gebildet wird;
    Weitererwärmen der pH-eingestellten Aufschlämmung auf eine Temperatur von mindestens ungefähr 60 °C für mindestens ungefähr 1,5 Stunden;
    Abkühlen der pH-eingestellten Aufschlämmung auf ungefähr Umgebungstemperatur, wobei die pH-eingestellte Aufschlämmung zu der Zeit, zu der der Schritt des Abkühlens beginnt, einen pH-Wert von mindestens ungefähr 8 aufweist;
    Zugeben eines Feuchthaltemittels zu der pH-eingestellten Aufschlämmung während oder nach dem Schritt des Abkühlens; und
    Trocknen der pH-eingestellten Aufschlämmung bei einer Temperatur und für eine Zeit, die ausreichend sind, um den Feuchtegehalt des Tabakmaterials auf weniger als ungefähr 15 Gew.% zu senken, basierend auf dem Gewicht des feuchten Tabakmaterials.
  13. Verfahren nach einem der Ansprüche 1 bis 8, umfassend:
    Bereitstellen einer Aufschlämmung, umfassend Wasser und ein Tabakmaterial;
    Erwärmen der Aufschlämmung auf eine Temperatur von mindestens ungefähr 60 °C für eine Zeit, die ausreichend ist, um das Tabakmaterial zu pasteurisieren;
    Zugabe einer Base zu der Aufschlämmung in einer Menge, die ausreichend ist, um den pH-Wert der Aufschlämmung auf mindestens ungefähr 8,5 anzuheben, so dass eine pH-eingestellte Aufschlämmung gebildet wird;
    Weitererwärmen der pH-eingestellten Aufschlämmung auf eine Temperatur von mindestens ungefähr 60 °C für eine Zeit, die ausreichend ist, damit der pH-Wert der Aufschlämmung mindestens ungefähr 0,5 pH-Einheiten fällt, nach dem Schritt des Zugebens; und
    Abkühlen der Aufschlämmung auf eine Temperatur von weniger als ungefähr 35 °C,
    wobei das Verfahren ferner den Schritt des Zugebens eines Salzes zu der Aufschlämmung vor dem Schritt des Erwärmens oder des Zugebens eines Feuchthaltemittels während oder nach dem Schritt des Abkühlens umfasst.
EP10152287A 2007-07-23 2008-07-22 Rauchlose Tabakzusammensetzungen und Verfahren zur Behandlung von Tabak zu dessen Verwendung darin Revoked EP2179666B1 (de)

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DK11157884.5T DK2377413T3 (en) 2007-07-23 2008-07-22 Smokeless tobacco compositions and methods of treating tobacco for use therein
EP11157884.5A EP2377413B1 (de) 2007-07-23 2008-07-22 Rauchlose tabakzusammensetzungen und verfahren zur behandlung von tabak zu dessen verwendung darin

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US11/781,641 US7946295B2 (en) 2007-07-23 2007-07-23 Smokeless tobacco composition
US11/781,604 US7810507B2 (en) 2006-02-10 2007-07-23 Smokeless tobacco composition
US11/781,666 US8061362B2 (en) 2007-07-23 2007-07-23 Smokeless tobacco composition
EP08796428.4A EP2173200B1 (de) 2007-07-23 2008-07-22 Rauchfreie tabakzusammensetzungen und verfahren zur behandlung von tabak zur verwendung für diese

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EP2377413B1 (de) 2017-03-01
EP2173200A2 (de) 2010-04-14
EP2377413A1 (de) 2011-10-19
WO2009015142A8 (en) 2010-01-28
WO2009015142A3 (en) 2009-08-27
EP2179666A2 (de) 2010-04-28
CN101873809A (zh) 2010-10-27
DK2377413T3 (en) 2017-05-01
JP2010534475A (ja) 2010-11-11
CN101873809B (zh) 2014-11-12
EP2179666A3 (de) 2010-09-22
WO2009015142A2 (en) 2009-01-29
JP5339635B2 (ja) 2013-11-13
EP2173200B1 (de) 2017-11-15

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