ES2659715T3 - Smokeless tobacco compositions and methods for treating tobacco for use therein - Google Patents

Abstract

A smokeless tobacco product configured to be inserted into the mouth of a user of the product, the tobacco product comprising a water permeable bag containing a tobacco formulation, the tobacco formulation comprising a tobacco material and a plurality of dispersed microcapsules within said tobacco material, the plurality of microcapsules comprising an outer shell that encapsulates an internal active load, the outer shell of the microcapsules being brittle so that the rupture of the outer shell exposes the active load to the tobacco material, and where Internal active loading comprises a loading material and a flavoring containing tobacco, where the loading material comprises a plant fiber material.

Description

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DESCRIPTION

Smokeless tobacco compositions and methods for treating tobacco for use therein FIELD OF THE INVENTION

The present invention relates to tobacco, and in particular, to the use of tobacco in a smokeless form.

BACKGROUND OF THE INVENTION

WO 2007/037962 A1 describes a smokeless tobacco product that includes a smokeless or granular smokeless tobacco formulation that is contained within a moisture permeable package or bag. At least one capsule is arranged in the bag.

Cigarettes, cigars and pipes are popular smoking items that use tobacco in various ways. Such smoking articles are used by heating or burning the tobacco and the smoker inhales the spray (for example, smoke). Tobacco can also be used in the form called "smokeless". Particularly popular smokeless tobacco products are employed by inserting into the user's mouth some form of processed tobacco or formulation containing tobacco.

Various types of smokeless tobacco products are presented in U.S. Pat. us. 1,376,586 issued to Schwartz; 3,696,917 issued to Levi; 4,513,756 issued to Pittman and others; 4,528,993 issued to Sensabaugh, Jr and others; 4,624,269 issued to Story and others; 4,987,907 issued to Townsend; 5,092,352 issued to Sprinkle. III and others; and 5,387,416, issued to White and others; U.S. patent application publication no. 2005/0244521 issued to Strickland and others; PCT documents WO 04/095959, issued to Arnaro and others; PCT WO 05/063060 issued to Atchley and others; PCT WO 05/004480 issued to Engstrom; PCT WO 05/016036 issued to Bjorkholm, and PCT WO 05/041699 issued to Quinter et al. See also the types of smokeless tobacco formulations, ingredients and processing methodologies set forth in U.S. Pat. us. 6,953,040 issued to Atchley and itros; 7,032,601 issued to Atchley and others; U.S. patent application publications us. 2005/0178398 issued to Breskin and others and 2006/0191548, issued to Strickland and others; PCT documents WO 05/041699; and the publication of the U.S. patent application No. 2008/029117, of Mua et al.

One type of smokeless tobacco product is called "snuff."

Representative types of wet snuff products, commonly called “rapés”, are manufactured in Europe, particularly in Sweden by companies or through companies such as Swedish Match AB, Fiedler & Lundgren AB, Gustavus AB, Skandinavisk Tobakskompagni A / S, and Rocker Production AB. The snuff products available in U.S.A. They are marketed under the trade names Camel Snus Frost, Camel Snus Original and Camel Snus Spice by R.J. Reynolds Tobacco Company. They also market representative smokeless tobacco products under the trade names Oliver Twist House of Oliver Twist A / S; Copenhagen, Skoal, SkoalDry, Rooster, Red Seal, Husky and Revel, U.S. Smokeless Tobacco Co .; "Taboka", Philip Morris USA; and Levi Garrett, Peachy, Taylor's Prode, Kodiak, Hawken Wintergreen, Grizzly, Dental, Kentucky King and Mammoth Cave, Conwood Sales Co., L.P. ; See also, for example, Bryzgalov et al., 1N1800 Life Cycle Assesment, Comoparative Life Cycle Assesment of General Loose and Portion Snus (2005). In addition, certain quality standards associated with the manufacture of rapés have been joined as the so-called GothiaTek standard.

It would be desirable to provide a pleasant form of a smokeless tobacco product and to provide methods for preparing tobacco compositions for use in smokeless tobacco products.

SUMMARY OF THE INVENTION

The present invention relates to a smokeless tobacco product as defined in the claims. Methods for preparing a tobacco composition suitable for use in a smokeless tobacco product are also described. The product includes a formulation that can have various forms, such as loose wet snuff, loose dry snuff, chewing tobacco, pelletized snuff pieces, extruded or shaped tobacco strips, pieces, cylinders or sticks, finely ground powders, finely divided agglomerates or milled pieces and powdered components, pieces of molded processed tobacco, pieces of rubber containing tobacco, rolled tape films, films or strips easily soluble or dispersible in water, or capsule-like material. In one embodiment, the smokeless tobacco product is in the form of a tobacco formulation disposed within a moisture permeable container. Preferably, the smokeless tobacco formulation includes stranded, granular or particulate tobacco and may include other ingredients such as sweeteners, dyes, pH adjusting agents, fillers, flavoring agents, disintegrating aids, antioxidants, oral care additives and preservatives

In one aspect of the invention, the smokeless tobacco product includes at least one additive or ingredient disposed within a tobacco formulation, wherein the additive is in a form adapted to segregate, or otherwise, create physical separation between , the additive and one or more components of the tobacco formulation, during normal storage and / or use conditions. Separating certain additives from other components of the

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Tobacco formulation one or more of several functional advantages can be achieved, such as an increase in storage stability, a reduction in chemical interactions within the tobacco formulation that may shorten the half-life and / or degrade sensory characteristics of the tobacco formulation, a minimization of the effect of certain additives on the sensory characteristics of the tobacco formulation and an increase in the ability to adjust the characteristics of the product (for example, moisture content) at the time of manufacture without sacrificing the storage stability

Thus, the invention provides a smokeless tobacco product configured for insertion into the mouth of a user of the product, the tobacco product comprising a tobacco formulation in a form suitable for insertion into the mouth of a user and at least one additive contained within the tobacco formulation, the additive being present in a form that physically separates the additive from the tobacco formulation. Suitable forms designed to carry out such separation, and therefore promote the inhibition of the interaction of selected components during handling and storage, include encapsulated forms; strips, tablets, films and the like, which have selected ingredients trapped or suspended in them physically or chemically; and the like

An encapsulated form is used to separate the additive, including the encapsulated form a barrier or wall structure that defines an active load or inner region containing the additive. The invention includes a tobacco formulation that includes a plurality of microcapsules containing an additive designed to increase the sensory characteristics of the product or add functional advantages to the product. The use of additives in microencapsulated form can improve the storage stability of the product, particularly the stability of the product's sensory profile, and protect the degradation of certain additives over time. Microencapsulation can also isolate the user from undesirable sensory characteristics associated with the encapsulated ingredient, such as certain fillers, or provide a milder sensory experience by extending the release of certain flavorings over time. Water microencapsulation can lead to the product that is produced, stored and transported at a lower level of humidity, which can reduce storage and transport costs and improve product storage stability. Examples of additives that can be microencapsulated or otherwise segregated within a tobacco formulation, include water, flavorings (eg, sweeteners or flavorings containing tobacco), binders, colorants, pH regulators, buffering agents, fillers, adjuvants disintegration, humectants, antioxidants, oral care ingredients, preservatives and additives derived from herbal or botanical sources.

A representative microcapsule embodiment has an outer shell, envelope or liner, which envelops a liquid or solid core region, and in certain embodiments, the microcapsule may have a generally spherical shape. By encapsulating an additive within the core region of a microcapsule, the ability of the additive to interact with other components of the tobacco formulation is reduced or eliminated, which can increase the storage stability of the resulting product. The core region, which typically releases the additive when the outer shell suffers some kind of physical destruction, breakage or other loss of physical integrity (for example, by dispersion, softening, crushing, pressure application, or the like), thus provides the alteration of the sensory properties of the smokeless tobacco product. Thus, in many embodiments, the outer shell of the microcapsules is designed to break during use, or is soluble in water under conditions of normal use, such as under conditions of at least about 45 weight percent moisture based on weight. Total smokeless tobacco product. However, in other embodiments, the wrap region is not intended to break during use, and in fact, maintains its integrity and does not release the contents of the core region. The outermost moisture-permeable container preferably has the shape of a sack or bag, such as the type commonly used for the manufacture of snuff products.

In one embodiment, a smokeless tobacco product is provided, configured for insertion into the mouth of a product user, the tobacco product comprising a water-permeable bag, containing a tobacco formulation, the tobacco formulation comprising a tobacco material and a plurality of microcapsules dispersed within the tobacco material. The microcapsules preferably comprise an outer shell that encapsulates an internal active load comprising an additive, such as water, flavorings (eg, sweeteners or flavorings containing tobacco), binders, colorants, pH regulators, buffering agents, oral care additives , fillers, disintegration aids, humectants, antioxidants, preservatives, additives derived from herbal or botanical sources, or mixtures thereof.

In another embodiment, a smokeless tobacco product is provided, configured for insertion into the mouth of a product user, the tobacco product comprising a water permeable bag, containing a tobacco formulation, the tobacco formulation comprising a tobacco material and a plurality of microcapsules dispersed within the tobacco material, the plurality of microcapsules comprising an outer shell that encapsulates an internal active load comprising an additive selected from the group consisting of water, a flavoring and mixtures thereof. Preferred microencapsulated flavoring agents include tobacco-containing flavorings, such as tobacco extracts or tobacco material in the form of particles, sweeteners, (eg, sweeteners containing neotame), and vanillin (optionally in a complexed form). When the microencapsulated additive is water, the moisture content of the tobacco formulation

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before use it is preferably less than about 20 percent by weight based on the total weight of the formulation, more preferably less than about 15 percent by weight, and most preferably, less than about 10 percent by weight.

In yet another embodiment, the present invention provides a smokeless tobacco product comprising a water permeable bag containing a tobacco formulation, the tobacco formulation comprising a material and a plurality of microcapsules dispersed within the tobacco material, comprising the plurality of microcapsules an outer shell encapsulating an internal active load comprising a flavoring selected from a group consisting of a sweetener composition comprising neotame, a tobacco-containing flavoring and mixtures thereof, where the microencapsulated flavoring is present in an amount of less about 1 percent based on the weight of the dry tobacco formulation, and where the outer shell of the microcapsules is water soluble under conditions of at least about 45 percent by weight moisture, based on the total weight of the formulation .

In yet another embodiment, the invention provides a smokeless tobacco product comprising a water permeable bag containing a tobacco formulation, the tobacco formulation comprising a tobacco material and a plurality of breakable microcapsules dispersed within the material. of tobacco, comprising the plurality of microcapsules that can be broken, an outer envelope that encapsulates an active internal load comprising water, where the moisture content of the tobacco formulation before the microcapsules break is not more than about 20 per weight percent based on the total weight of the formulation.

In yet another embodiment, a smokeless tobacco product is provided comprising a water permeable bag, which contains a tobacco formulation, the tobacco formulation comprising a tobacco material and a plurality of microcapsules dispersed within the tobacco material, the plurality of microcapsules comprising an outer shell encapsulating an internal active load comprising an additive selected from the group consisting of a filler material, a buffering agent, an additive derived from an herbal or botanical source and mixtures thereof.

Loading materials include plant fiber materials such as sugar beet fiber materials, corn flakes or other cereal grains, bran fibers, starch or other natural or modified cellulosic materials. The microencapsulated filler material is typically present in an amount of at least about 5 percent based on the weight of the dry formulation.

Preferred buffering agents buffer within a pH range of about 6 to about 10, and examples of buffering agents include metal hydroxides, metal carbonates, metal bicarbonates or mixtures thereof. The microencapsulated buffering agent is typically present in an amount of at least about 1 percent based on the dry weight of the formulation.

Additives derived from herbal or botanical sources suitable for use in the invention are often in the form of an oil or extract. Examples of compounds that may be present in such additives include minerals, vitamins, isoflavones, phytosterols, allyl sulfides, dithiolthiones, isothiocyanates, idols, lignans, flavonoids, polyphenols and carotenoids.

In a further embodiment, the invention provides a smokeless tobacco product comprising a water permeable bag containing a tobacco formulation, the tobacco formulation comprising a tobacco material and a plurality of microcapsules dispersed within the tobacco material, comprising the plurality of microcapsules an outer shell that encapsulates an active internal load comprising a filler material, where the outer shell of the microcapsules is not soluble in water under conditions of at least about 45 percent by weight moisture, based on weight Total formulation.

In many of the embodiments indicated above, the part containing the tobacco (for example, extruded or shaped tobacco products, tobacco contained in a bag and the like) is intended to be placed in the mouth of the tobacco user, so that The formulation of tobacco within the part containing tobacco is enjoyed by the user. During the use of certain embodiments of the product of the present invention, the outer shell of the microcapsules within the tobacco-containing part, can be activated by moisture inside the user's mouth, breaking, crushing or otherwise acting to release their contents. After the tobacco user has finished using the smokeless tobacco product, the moisture-permeable outer bag, if any, can be removed from the user's mouth for disposal. Alternatively, this other bag, if any, can be manufactured from a material that can be dissolved or dispersed, so that the tobacco formulation and the bag can be ingested by the user. Residual components of the outer shell of the microcapsules can be dispersed inside the user's mouth for ingestion or remain inside the bag used for disposal.

Methods are provided for preparing a tobacco composition suitable for use as a composition of

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smokeless tobacco These methods can be characterized as including a heat treatment step that can be considered as a type of pasteurization adapted to degrade, destroy or denature at least a part of the microorganisms of the tobacco composition. In one embodiment, the method comprises providing a mixture comprising water and a tobacco material having a high moisture content (for example in the form of a dispersion), such as a mixture comprising at least about 75% by weight of water. in relation to the total weight of the mixture. The mixture is subjected to a heat treatment stage for a time and at a temperature adapted to pasteurize the material (for example, heating the mixture at a temperature of at least about 60 ° C for a sufficient time for the material to be pasteurized ). Subsequently, an amount of a base sufficient to raise the pH of the mixture to the alkaline pH range (ie, above 7.0) is added to the mixture, thus forming a mixture of adjusted pH. In one embodiment, sufficient base is added to raise the pH of the mixture to at least about 8.5. During and after the step of adding the base, it is preferable to continue heating the adjusted pH mixture (for example at a temperature of at least 60 ° C) for a time sufficient for the pH of the mixture to fall at least 0, 5 pH units after the base addition step.

The method may also include the step of adding a salt to the mixture before or during the heat treatment. For example, the step of adding the base may comprise the addition of about 1% to about 5% by weight of sodium chloride in relation to the dry weight of the tobacco material.

After the step of adding the base, the mixture can be cooled (for example at a temperature below about 35 ° C). A moisturizer can be added during or after the cooling stage. Then, if desired, the pH of the mixture can be readjusted with an additional base (for example at a pH of about 8.0 or less) and the mixture can be dried (for example at a moisture content of not more than approximately 15% by weight in relation to the total weight of the dry tobacco material). If desired, flavoring agents, sweeteners and additional moisture (for example, in an amount sufficient to increase the moisture content of the tobacco material to at least about 25% by weight) can be added to the dried tobacco material.

In a particular embodiment of the method, the method includes: providing a suspension comprising water and a tobacco material, suspension comprising at least about 80% water in relation to the total weight of the suspension; heating the suspension at a temperature of at least about 70 ° C for at least 30 min (or another suitable time for a desired treatment); adding an amount of a base to the suspension, sufficient to raise the pH of the mixture to approximately 9.0, thus forming a suspension of adjusted pH; continue heating the adjusted pH suspension to a temperature of at least about 60 ° C; for at least 1.5 h (or another suitable time that effectively provides the desired treatment); cooling the adjusted pH suspension to approximately room temperature, the adjusted pH suspension having a pH of approximately 8 at the time the cooling stage begins; and drying the adjusted pH suspension at a temperature and for a time sufficient to lower the moisture level of the tobacco material to less than about 15% by weight in relation to the weight of the wet tobacco material.

Another exemplary method is provided for preparing a tobacco composition suitable for use as a smokeless tobacco composition. The method also includes a heat treatment stage that can be considered as a type of pasteurization treatment. In one embodiment, the method comprises providing a wet tobacco material having a first moisture content (for example, having a moisture content of at least about 30% by weight relative to the total weight of the wet tobacco material) and heating the wet tobacco at a temperature (for example, at a temperature of at least about 85 ° C) for a sufficient time to pasteurize the tobacco material while maintaining the wet tobacco material at approximately the same humidity level (this is, the initial moisture content) or higher (for example, a moisture content at a level of at least about 30% by weight). Thereafter, an amount of a base and water can be added to the wet tobacco material in an amount sufficient to raise the pH of the wet tobacco material to a pH in the alkaline range (for example at approximately 8.7 at least) and increase the moisture content of the tobacco material at a second moisture content (for example at least about 40% by weight), thus forming a wet tobacco material of adjusted pH. The method may include heating the wet tobacco material of pH adjusted to an elevated temperature (for example at a temperature of at least about 55 ° C) for a sufficient time so that the pH of the wet tobacco material drops to a lower level within the alkaline range (for example, a drop to less than about 8.5) while maintaining the moisture content at approximately the same moisture level (i.e., the second moisture content) or higher (for example, 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 (for example at a temperature of at least 35 ° C for a time sufficient to reduce the moisture content of the tobacco material tobacco at less than about 35% by weight) while the pH is maintained in the alkaline range (for example at least 7.6). The method may further comprise the step of adding a sweetener composition to the dried tobacco material.

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In one embodiment, the wet tobacco material may comprise a mixture of dry tobacco material having a moisture content of less than about 15% by weight and an aqueous solution of a salt, which mixture can be prepared by heating the tobacco material dry at an elevated temperature (for example, at least at about 60 ° C) and adding an aqueous salt solution (for example sodium chloride solution) to the heated tobacco material.

In one embodiment, the step of continuing to heat the adjusted pH wet tobacco material comprises heating the adjusted pH wet tobacco material to a temperature and humidity level sufficient to maintain a pH reduction rate of about 0.05 a 0.15 units per hour.

In a particular embodiment, a method for preparing a tobacco composition suitable for use as a smokeless tobacco composition is described, method comprising: providing a wet tobacco material comprising a mixture of tobacco material and a salt solution, material of wet tobacco having a moisture content of about 30% to about 40% by weight in relation to the total weight of the wet tobacco material; heating the wet tobacco at a temperature of at least about 90 ° C for at least about 1 hour (or other suitable time that you effectively provide the desired treatment) to pasteurize the tobacco material while maintaining the moisture content at a level of about 30% to about 40% by weight; add to the wet tobacco material an amount of a base and water sufficient to raise the pH of the suspension to at least 8.7 and increase the moisture content to at least about 45% by weight, thus forming a wet tobacco material of pH adjusted; continue heating the wet tobacco material of pH adjusted to a temperature of at least about 65 ° C for at least about 1 hour (or other suitable time that you effectively provide the desired treatment) while maintaining a moisture content of at least about 45% by weight and a pH of at least about 8; and drying the adjusted pH tobacco material 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 of at least about 7 6.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to provide an understanding of embodiments of the invention, reference is made to annexed drawings, which are not necessarily drawn to scale, and in which reference numbers refer to components of the embodiments of the invention described by way of example. The drawings are by way of example only and should not be construed as limiting the invention.

Figure 1 is a cross-sectional view of an embodiment of smokeless tobacco taken according to the width of the product, showing an outer bag filled with tobacco material and microcapsules arranged in the tobacco material.

Figure 2 is a cross-sectional view of a second smokeless tobacco product taken according to the width of the product, showing an outer bag, tobacco material contained in the bag, with microcapsules and a larger spherical capsule (also seen in section transverse) also contained in the bag.

Figure 3 is a cross-sectional view of a third smokeless tobacco product taken along the product, showing an outer bag and tobacco material, microcapsules, a flavoring sheet and two larger spherical capsules (also seen in cross-section. ) contained in the bag, and Figure 4 is a cross-sectional view of a fourth smokeless tobacco product taken along the product, showing an outer bag, an inner bag, tobacco material and microcapsules, with a capsule greater contained in the inner bag.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The present invention will be described in more detail in the following with reference to the accompanying drawings. Inventions can be made in many different ways and should not be construed to be limited to the embodiments presented; rather, these embodiments are provided so that this description will satisfy the legal requirements. Throughout the document, equal numbers refer to equal elements. As used herein and the claims, the singular forms "a", "one and" the "include plural referents unless the context dictates otherwise.

Certain embodiments of the invention will be described with reference to the accompanying drawings, and these described embodiments involve snuff products that have an outer bag and that contain capsules within the tobacco formulation. As explained in detail below, such embodiments are only exemplary and the smokeless tobacco product may include tobacco compositions with other forms and include additives encapsulated or otherwise segregated from other components of the tobacco formulation and using methods other than microencapsulation

As for Figure 1, a first embodiment of a smokeless tobacco product 10 is shown. The tobacco product 10 includes a moisture permeable container in the form of a bag 12 containing a filler material

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of tobacco 14 of a type described here. The smokeless tobacco product also comprises a plurality of microcapsules 16 dispersed within the tobacco filler material 14, microcapsules containing an additive as described in more detail below.

Figure 2 shows a second embodiment of a smokeless tobacco product 10. The tobacco product 10 includes a container bag 20. A preferred bag comprises a moisture-permeable mesh-shaped material. The container bag 20 shown is closed along an overlapping region 22. The overlapping region can be formed by closing the bottom portion of an edge of the bag 20 with the top portion of the opposite edge of the bag (for example, by heat sealing, with a suitable adhesive or by other suitable means). A solid tobacco material 14 is placed inside the bag 20 and a plurality of microcapsules 16 are dispersed in the tobacco material. An optional larger spherical capsule 26 is also placed inside the bag 20. The spherical capsule 26 has an outer cover 28 containing an active inner load 30.

Figure 3 shows a third embodiment of a smokeless tobacco product 10. The tobacco product 10 includes a container bag 34. A preferred container bag comprises a moisture permeable mesh material. The illustrated bag 34 is closed at its ends 36, 38 (for example, by heat, with a suitable adhesive or by any other suitable sealing method). Inside the bag 34 there is a tobacco material 14 and dispersed within the tobacco material there is a plurality of microcapsules 16. The bag 34 also contains two larger optional spherical capsules, 40 and 42. Each of the spherical capsules 40, 42 has an outer envelope 44, 46 containing an active inner load 50.52. Also included in the bag is an optional soluble strip of a material having an aroma, represented as an aromatic sheet 56. In certain alternative embodiments, a strip of aromatic material, such as aromatic sheet 56, may be disposed in a bag 34 without any major capsules

Figure 4 shows a fourth embodiment of a smokeless tobacco product 10. The tobacco product 10 includes an outer wrap 12 and an inner wrap 60. Each of the preferred bags comprises a moisture permeable mesh material, and each One of the bags 12, 60 is illustrated without showing a seam that may be present in bags containing a flavoring agent member such as a larger capsule (for example, a large capsule), as well as bags without larger capsules. The outer bag 12 forms a continuous container around a tobacco material 14 containing dispersed microcapsules 16. The inner bag 60 is located inside the outer bag 12 and is generally surrounded by the tobacco material 14, although the inner bag 60 may also be in contact with the outer bag 12, adhered thereto or joined continuously. The inner bag 60 contains a large capsule 62 with an outer shell 66 and an inner active load 68. Although the inner bag 60 is shown with the inner space surrounding the capsule 62 in order to clarify the illustration, in preferred aspects of this embodiment the inner bag 60 will be surrounding its contents intimately. In an alternative embodiment, the inner bag may contain a flavoring strip such as a soluble flavored strip (eg, a Cinnamon Oral Care tape, Listerine PocketPaks of Pfizer, inc.).

The smokeless tobacco product of the invention may include at least one additive or ingredient of the tobacco composition in a form that physically separates or segregates the additive from a certain amount or other components of the tobacco composition to some extent. The functional advantage of such separation may vary, but typically involves minimizing or eliminating the chemical interaction between the additive and other components of the tobacco composition under storage and / or use conditions. The separation of certain additives can thus intensify the storage stability of the resulting tobacco product and / or the maintenance of the desirable sensory characteristics of the product. The separation means can be diverse, including the encapsulation of the additive or the use of the additive in different forms such as beads, pellets, bars, strand films, chains, lamellar structures or sheets, sheets, strips or other forms. The additive may also be trapped or encapsulated within a seam of a bag containing the tobacco composition.

In one embodiment, the additive is in an encapsulated form comprising a barrier structure or outer wall and an internal region containing the additive. For example, certain embodiments of the invention, such as those described in Figures 1-4, include a plurality of microcapsules, microcapsules that include an inner region or core encapsulated by an outer shell region. The inner region includes a load of an additive adapted to intensify one or more sensory characteristics of the smokeless tobacco product, such as taste, mouthfeel, moisture, coldness / heat, and / or fragrance, or adapted to add a quality additional functional to the smokeless tobacco product, such as the addition of an antioxidant or an immune system that enhances function. The outer shell or coating of the microcapsules serves as a barrier between the active load and the tobacco composition of the smokeless tobacco product. Depending on the desired application, this barrier can be permanent, being understood as such that it is intended to remain in place as a barrier during the life of the product, or temporary, which means that the barrier is designed to stop serving as a barrier and , therefore, to release the load under certain conditions of use of the product.

In many embodiments, the additive is released into the core region when the outer shell experiences some kind of physical destruction, breakage or other loss of physical integrity (e.g., by disintegration, softening, shredding, pressure application or the like) and they are altered. therefore the sensory or functional properties of

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Smokeless tobacco product during the use of the product, Thus, for example, the microcapsules can be incorporated into the bag together with the tobacco formulation and, during use, the contact of the microcapsules with the moisture present in the mouth of the user can cause the capsules to soften, lose their physical integrity and release the additive in the user's mouth. Alternatively, the microcapsules can be deliberately crushed by pressure application to release the additive. This release of the additive can alter or intensify the taste or other sensory characteristics of the product, extend the period of time that the user can enjoy the product or provide other functional advantages. In other embodiments, the wrapper is not designed to release the additive under normal use conditions, as in the case of encapsulated fillers.

Tobacco product 10 is typically used by putting a bag containing the tobacco formulation in the mouth of a person / user. During use, saliva causes in the mouth of the user that some of the components of the tobacco formulation pass through the water permeable bag to the user's mouth. Preferably, the bag is not chewed or swallowed. To the user tobacco flavor and satisfaction is provided and it is not necessary to spit a part of the tobacco formulation. In addition, in many embodiments, the microcapsules are destroyed during the use of the product and the contents of the microcapsules are introduced into the user's mouth. After about 10 minutes to 60 minutes, preferably after about 15 to 45 minutes of use / enjoyment, the person has ingested the contents of the microcapsules and substantial amounts of the tobacco formulation and can be removed from the person's mouth. bag as waste.

Exemplary types of additives that can be separated from other components of the tobacco formulation by encapsulation (for example, included in the microcapsule filler) or other techniques include water, flavoring agents, tobacco material (e.g. tobacco material in the form of particles or in the form of tobacco extract), organic and inorganic fillers (for example, processed grains, bulging beans, maltodextrin, dextrose, calcium carbonate, calcium phosphate, corn starch, lactose, mannitol, xylitol, sorbitol, cellulose finely divided and the like), binders (for example povidone, carboxymethyl cellulose and other types of modified cellulose binders, gum arabic, lecithin and the like), pH adjusting agents or buffers (e.g., metal hydroxides, preferably alkali metals, such as sodium hydroxide and potassium hydroxide, and other alkali metal buffers such as metal carbonates, preferably potassium carbonate or sodium carbonate, or metal bicarbonates such as sodium bicarbonate, and the like), dyes (for example, dyes (dyes and pigments, including caramel dyes and titanium dioxide), humectants (for example glycerin, propylene glycol and the like), additives for oral care, preservatives (for example potassium sorbate and the like), syrups (for example honey, fructose corn syrup and the like, used as flavoring agents), disintegration aids (for example, microcrystalline cellulose, croscarmellose sodium, crospovidone , sodium starch glycolate, pregelatinized corn starch and the like), additives derived from herbal or botanical sources, and mixtures thereof. Representative types of active load components are presented in U.S. Pat. no. 5,387,416, issued to White and others; US patent application no. 2005/0244521, issued to Strickland and others; US patent application no. 2004/0261807 issued to Dube et al., And PCT document WO 05/041699 issued to Quinter et al.

Examples of flavoring agents that can be used are components, or suitable combinations of those components, which act to alter the bitterness, sweetness, sour taste, or bitter taste of the smokeless tobacco product, intensify the dryness or moisture of the formulation or the degree of tobacco flavor exhibited by the formulation. Among the types of flavoring agents are 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 (for example, sucralose, saccharin, aspartame, acesulfame K, neotame and the like; and mixtures thereof. Flavoring agents can be natural or synthetic and the character of these flavors imparted by them can be Describe, without limitation, as fresh, sweet, herbal, confectionery, floral, fruit or space.A specific types of flavors include, but are not limited to, vanilla, coffee, chocolate / cocoa, cream, mint, spearmint, menthol , peppermint, gaulteria, eucalyptus, lavender, cardamom, nutmeg, cinnamon, cloves, husks, sandalwood, honey, jasmine, ginger, anise, sage, licorice, lemon, orange, apple , peach, cherry lime, strawberry and any combinations thereof. See, also, Leffingwell et al., Tobacco Flavoring for Smoking Products, R.J. Reynolds Tobacco Company (1972). Flavoring agents may also include components that are considered humectants, softening or cooling agents, such as eucalyptus. These flavoring agents can be provided net (i.e., alone) or as a composite material, for example, spearmint and menthol, or orange and cinnamon). The compound flavoring agents can be combined in a single capsule as a mixture or as separate components of separate microcapsules.

In a preferred embodiment, the segregated additive, such as an additive in the active loading of the microcapsules, is a flavoring composition based on tobacco, such as a flavoring comprising particulate tobacco material or a tobacco extract (for example an extract of tobacco in solid form). As a microencapsulated flavoring agent, any class of the materials mentioned herein could be used. The use of a microencapsulated tobacco flavoring agent can provide the smokeless tobacco formulation with extensive flavor release characteristics. Some forms of smokeless tobacco tobacco formulations provide a strong sensory profile. Microencapsulating a portion of the tobacco material of the formulation can achieve a

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softer sensory experience. Microencapsulation of a tobacco flavoring agent can also extend the sensory experience by providing a slow continuous release over time of tobacco flavor as the product remains in the mouth. Preferred microencapsulated flavoring agents will provide an extensive release of the tobacco flavor under normal use conditions of the tobacco product, such as under conditions of 45% or more moisture in relation to the total weight of the smokeless tobacco product.

Useful tobacco extracts can be used as components of the tobacco formulation and, in particular, extracts suitable for use as a segregated additive. The extracts can be used in solid form (for example, in spray-dried or freeze-dried form), in semi-solid form or the like. Examples of tobacco extracts and extraction techniques are given in, for example, US Pat. 4,150,677, issued to Osborne, Jr. and others; 4,967,771 issued to Fagg and others; 5,005,593 issued to Fagg and others; 5,148,819 issued to Fagg, and 5,435,325 issued to Clapp et al. In US patents nos. 5,065,775 issued to Fag; 5,360,022 issued to Newton, and 5,131,414 issued to Fagg, all of which are incorporated herein by reference, various methodologies for tobacco extraction and reconstitution are given. See also the tobacco extract treatment methodologies set forth in US Pat. 5,131,415 issued to Munoz and others, and 5,318,050 issued to Gonzalez-Parra.

Known techniques for processing reconstituted tobacco, such as papermaking techniques or methods of laundry type, can be employed. See, for example, the types of paper production methods considered in US Pat. 3,398,754 issued to Tughan; 3,847,164 issued to Mattina; 4,131,117 issued to Kite; 4,270,552 issued to Jenkins; 4,308,877 issued to Mattina; 4,341,228 issued to Keritsis; 4,421,126 issued to Gellatly; 4,706,692 issued to Gellatly; 4,962,774 issued to Thomasson; 4,941,484 issued to Clapp; 4,987,906 issued to Young; 5,056,537 issued to Brown; 5,143,097 issued to Sohn; 5,159,942 issued to Brinkley and others; 5,325,877 issued to Young; 5,445,169 issued to Brinkley; 5,501,237 issued to Young; 5,533,530 issued to Young; which are incorporated here by reference. See, for example, the casting methods set forth in US Patent Nos. 3,353,541 issued to Hind; 3,399,454 issued to Hind; 3,483,874 issued to Hind; 3,760,815 issued to Deszyck; 4,674,519 issued to Keritsis; 4,972,854 issued to Kiernam; 5,023,354 issued to Hickle; 5,099,864 issued to Young; 5,101,839 issued to Jakob; 5,203,354 issued to Hickle; 5,327,917 issued to Lekwauwa; 5,339,838 issued to Young; 5,598,866 issued to Jakob; 5,715,844 issued to Young; 5,724,998 issued to Gellatly, and 6,216,706 issued to Kumar; and EPO 565360, EPO 1055375 and PCT WO 98/01233. Extracts, extracted materials and suspensions used in traditional types of reconstituted tobacco methods can be used as ingredients in tobacco formulations for smokeless tobacco products described herein.

In another embodiment, the segregated asset, such as an active microcapsule load, comprises vanilla as a flavoring agent. Under certain conditions, such as at a basic pH, the presence of vanilla in a smokeless tobacco formulation can lead to a reddish spot on the bag over time. By microencapsulating the vanilla, the vanilla is stabilized in the smokeless tobacco product and the possibility of staining the bag is reduced. In certain embodiments, the microencapsulated vanilla may be in the form of complex vanilla that releases vanilla over time, such as in the form of ethyl vanilla glycoside. In preferred embodiments, the microencapsulated vanilla will provide prolonged vanilla release during normal use conditions, such as under conditions of a humidity level of 45% or more.

In another embodiment, the segregated additive, such as a microcapsule filler additive, is a natural and / or artificial sweetener, such as the SUCRASWEET® brand sweetener, available from Sweetener Solutions Company. SUCRASWEET® is a combination of neotame, acesufamopotasio and maltitol. It is possible that certain sweeteners, in particular sweeteners that contain neotame, have a lack of stability under certain conditions, such as at basic pH. Certain sweeteners can be chemically decomposed into by-products that can alter the sensory characteristics of the smokeless tobacco formulation in an undesirable manner, for example, by increasing the sour taste. By microencapsulating such sweeteners, the decomposition of the sweet-tasting agent can be reduced or prevented and the desired sensory profile of the smokeless tobacco product can be protected for a longer time. In preferred embodiments, the microencapsulated sweet flavoring agent will provide a continuous and prolonged release of flavoring and will be soluble in water under normal use conditions such as under conditions of a relative humidity level of 45% or more.

In yet another embodiment, the segregated additive, such as a microcapsule filler additive, is water that serves to increase the moisture level of the smokeless tobacco product. Adding microencapsulated or otherwise segregated water to the smokeless tobacco product can reduce the moisture level of the product during storage. After putting the product in the mouth, preferably the microencapsulated water provides a rapid release of water. Preferably in this embodiment, the outer shell of the microcapsules is not designed to dissolve during use of the product, but to break it during use, such as by crushing by the user, which provides a rapid release of water. on the product at any time during or before using the product. The ability to pack, store and transport a tobacco product at a lower humidity level reduces transport costs (for example.

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it is not necessary to cool) and increases the life until the product expires. The use of microencapsulated water is particularly suitable for tobacco formulations that have a moisture content, before use (for example during storage) of less than about 20% by weight, often less than 15% by weight and often , less than about 10% by weight in relation to the total weight of the tobacco formulation. A typical humidity range for the tobacco formulation is from about 5 to about 20% by weight.

The additive may also be in the form of isolated components (for example, oils or extracts) from botanical or herbal sources such as potato skin, grape seed, ginseng, gingko biloba, St. John's wort, saw palmetto, green tea, tea black, black cohosh, chamomile, cranberry, echinacea, garlic, onagro, tansy, gin. goldenseal herb, crataegs, kava, milk thistle, ursi and valerian grapes. Often, additives such as the oils and extracts indicated above include compounds of various kinds that are known to provide certain bioactive effects, such as minerals, vitamins, isoflavones, phytosterols, allyl sulfides, dithiolthiones, isocyanates, indoles, lignans, flavonoids, polyphenols and carotenoids. Examples of these types of extracts and oils include ascorbic acid, peanut endocarp, resveratrol, sulforaphane, beta-carotene, lycopene, lutein, coenzyme Q, carnitine, quercetin, canferol and the like. See, for example, Santhosh and others. Phytomedicine, 12 (2005) 216-220. The oil additives or extracts used in the present invention may comprise, without limitation, any compounds or sources mentioned herein, including mixtures thereof. Certain additives of this type are sometimes defined in the art as dietary, nutraceutical, "phytochemical" or "functional food" supplements. They are sometimes defined in the art as encompassing substances typically obtainable from natural sources (e.g., from plants) that provide one or more favorable biological effects (e.g., health promotion, disease prevention or other medical properties) but They are not classified or regulated as drugs.

In embodiments of the invention that include a microencapsulated or otherwise segregated component, derived or isolated from a botanical or herbal source, the microencapsulated additive may add biological functions to the product, such as reinforcing effects, antioxidant effects and the like. Microencapsulation may increase the likelihood that the bioactive additive will remain active until the product is used. In preferred embodiments, the microencapsulated bioactive additive will provide a continuous and prolonged release of the additive and will be soluble in water under normal use conditions, such as at a relative humidity level of 45% or more.

In yet another embodiment, the segregated additive, which may be an additive of the active microcapsule filler, may comprise a buffering agent, such as sodium bicarbonate and / or sodium carbonate. Suitable 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 Typically, suitable buffer agents buffer at a pH of less than about 10.0 often less than about 9.5 and often less than about 9.0. For optimal sensory characteristics, it is preferable to maintain the pH of smokeless tobacco formulations above about 7.5. However, over time it is possible for the pH of the smokeless tobacco formulation to decline, in particular at temperatures above room temperature. The use of a microencapsulated buffering agent that provides prolonged release can help keep the product in the desired pH range, resulting in a more consistent product sensory profile and prolonging life to expiration. In certain preferred embodiments, the microencapsulated buffering agent will release the buffering agent as the temperature of the product exceeds a certain temperature threshold (for example, about 80 ° F or about 27 ° C) or when the pH of the product decreases to an undesirably low level (for example at 7.3 or less).

According to the invention, a segregated additive, such as an additive of the active loading of the microcapsules, is a filler and comprises a plant fiber material. Certain fillers may impart less desirable sensory characteristics to the smokeless tobacco product. For example, certain loads may have a grainy or foody texture or taste. Microencapsulation or another way to achieve physical separation of the load can serve to minimize the effect of the sensory characteristics of the load on the overall sensory profile of the smokeless tobacco product. In this way, loads can be advantageously employed when a softer product is desired without imparting any discordant flavor features. A particularly preferred load is the FIBREX® brand load, available from International Fiber Corporation, which is a fibrous material derived from sugar beet. Other suitable fillers include corn flakes or other cereal grains, bran fibers, starch or other modified or unmodified cellulose materials. In preferred embodiments, the microencapsulated filler is a non-water soluble form under normal use conditions, such as a moisture level of 45% or more by weight.

As previously indicated, for many embodiments it is preferable that the outer shell of the microcapsules lose their physical integrity under conditions of normal use in the user's mouth, such as conditions of high relative humidity (for example, more than 45% of humidity in relation to the total weight of the smokeless tobacco product). In other embodiments it is preferable that the outer shell of the microcapsules lose their physical integrity when the smokeless tobacco product reaches a certain pH value, such as a value

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less than about 7.3, or a certain temperature, such as may be equal to or greater than about 27 ° C. In yet other embodiments, the microcapsules are designed to break after the user exerts a force of physical oppression, either by a pressure applied by hand before inserting the product into the mouth or by a pressure exerted after inserting the product into the oral cavity (for example, pressure applied by the tongue or with the teeth).

The active load of the microcapsule may have a shape that can vary. Typically, the filler has the form of a liquid or gel, although the filler can be in the form of a solid (for example, a crystalline material or a dry powder). In one embodiment, the filler is a mixture of the additive (for example, a flavoring agent and a diluting agent or carrier (for example water)). A preferred diluting agent is a triglyceride, such as a medium chain triglyceride and, more particularly, a feed quality 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 cases, the diluting agent can be completely removed and the entire charge may be constituted by the additive. Alternatively, the active filler may consist almost entirely of diluting agent and contain only a very small amount of relatively potent additive. In one embodiment, the composition of the mixture of additive and diluting agent is in the range of about 5% to about 99% and, more preferably, in the range of about 5% to about 75% of additive and, most preferably, of about 10 to about 25% by weight of additive in relation to the total weight of the active filler, the remainder being a diluting agent. The exact amount of additive will depend on several factors, including the type of additive and the desired sensory profile of the product.

The resistance to crushing of the microcapsules is sufficient for normal handling and storage without a significant degree of premature or unwanted breakage. The supply of capsules that have adequate integrity during storage and the ability to break or otherwise decompose during use can be determined by experimentation, depending on factors such as the size and type of the capsule. See, for example, U.S. Patent Publication no. 2007/0068540, issued to Thomas and others, which is incorporated herein by reference.

An example of a microcapsule may include an outer shell that incorporates a material such as wax, gelatin, cyclodextrin or alginate, and an active inner charge that incorporates an aqueous or non-aqueous liquid (for example, a solution or dispersion of at least one flavoring ingredient with water or an organic liquid such as an alcohol or oil; or a mixture of water and a miscible liquid such as alcohol or glycerin). Thus, for example, a plurality of such microcapsules can be incorporated into the bag together with the tobacco formulation; and during use of the product, crushing or other destruction of the microcapsules may allow the microcapsules to release the additive contained therein to provide adequate wetting of components of the tobacco formulation, as well as to provide other functional benefits such as a taste intensified For example, a suitable number of capsules having outer shells comprising a food grade waxy substance and an inner active load comprising water can be incorporated into the bag, so that, after such capsules break, water is released sufficient providing the effect of a desired wetting of the tobacco formulation.

The microcapsules used in the smokeless tobacco product of the invention may have a uniform or varied size, weight and shape, and the desired properties of the smokeless tobacco product will depend on such properties of the microcapsules. Generally, a representative microcapsule is spherical in shape. But suitable microcapsules can have other types of shapes such as generally rectilinear, oblong, elliptical or oval shapes. Exemplary microcapsules may have diameters of less than about 100 micrometers, such microcapsules having diameters in the range of about 1 to about 40 micrometers, or about 1 micrometer to about 20 micrometers,

The number of microcapsules incorporated into the smokeless tobacco product may vary depending on factors such as the size of the microcapsules, the character of the smokeless tobacco product and the like. The number of microcapsules incorporated into the smokeless tobacco product may exceed approximately 5, may exceed approximately 10, may exceed approximately 20, may exceed approximately 40, and may even exceed approximately 100. In certain embodiments, the number of capsules It can be greater than approximately 500 and even greater than approximately 1000.

The total weight of the microcapsules contained in the tobacco product may vary, but is typically greater than about 10 mg, often greater than about 20 mg and may 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 may be less than about 50 mg.

The relative weight of the microcapsules in the bag may vary. Typically, the dry weight of tobacco within the tobacco product is greater than the weight provided by the microcapsule components. However the

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The weight of the microcapsule components may vary from about 10% to about 75%, often from about 20% to about 50% in relation to the combined weight of microcapsule components and dry tobacco weight.

If desired, microcapsules of different sizes and / or different types (for example, of different wrapping materials, different wrapping properties such as shape or hardness and / or different components contained in the capsule) can be incorporated into the product. In this way, different microcapsules can be incorporated into the product to obtain the desired properties (e.g., mouthfeel, taste, other sensory effect) and / or provide the release of the encapsulated components at different times during the use of the product. . For example, a first set of microcapsules may supply a first flavoring ingredient after initially introducing the product into the 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 break than the coating of the first set of capsules).

The microcapsules of the invention can be formed using any microencapsulation technology known in the art. For example, microcapsules can be formed using any of the 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. Alternatively, physical encapsulation methods could be used, such as spray coating, tray coating, fluid bed coating, annular jet coating, rotating disk atomization, atomization cooling, atomization drying, rapid atomization cooling, stationary coextrusion with nozzle, coextrusion with centrifugal head or coextrusion with submerged nozzle.

Coacervation is a colloidal phenomenon that begins with a solution of a colloid in an appropriate solvent. Depending on the nature of the colloid, several changes can be made about reducing the solubility of the colloid. As a result of this reduction, a significant portion of the colloid can be separated into a new phase, thus forming a biphasic system, being a phase rich in colloid concentration and the other poor in colloid concentration. The colloid-rich phase in the dispersed state appears as droplets of amorphous liquid, called coacervated droplets. After resting, they coalesce in a homogeneous liquid layer rich in colloid, known as a coacervated layer, which can be deposited to produce the wall material of the resulting microcapsules.

Simple coacervation can be done by mixing two colloidal dispersions, one that has a high affinity for water, or that 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 phase, not a solvent of the emerging polymer (eg, gelatin). Ethanol, acetone, dioxane, isopropanol and propanol are examples of solvents that can cause the separation of a coacervant such as gelatin, polyvinyl alcohol or methylcellulose. Phase separation can be accomplished by adding an electrolyte such as an inorganic salt to an aqueous solution of a polymer such as gelatin, polyvinyl alcohol or carboxymethyl cellulose.

Complex coacervation can be induced in systems that have two dispersed hydrophilic colloids of opposite electrical charges. The neutralization of the overall positive charges of one of the colloids by the negative charge of the other is used to perform the separation of the complex coacervated phase rich in colloid. The jelly-gum arabic system is a known complex coacervation system.

The organic phase separation is sometimes simply called "oil in water" microencapsulation. In this case, the polar core is dispersed in an oily or non-polar continuous medium. The wall material is then dissolved in this continuous medium.

Regardless of the encapsulation methodology employed, the outer wall material or wrapping material and the solvents used to form the microcapsules of the invention may vary. Among the kinds of materials that are typically used as wall or wrapping materials are proteins, polysaccharides, starches, waxes, fats, natural and synthetic polymers and resins. Examples of materials for use in the encapsulation process used to form the microcapsules include gelatin, gum arabic, polyvinyl acetate, potassium alginate, locust bean gum, potassium citrate, carrageenan, potassium polymetaphosphate, citric acid, potassium tripolyphosphate, dextrin, polyvinyl alcohol, povidone, dimethylpolysiloxane, dimethylsilicone, refined paraffin wax, ethyl cellulose, bleached shellac, modified feed starch, sodium alginate, guar gum, sodium carboxymethylcellulose, hydroxypropylcellulose, hydroxypropylcellulose, hydroxypropylcellulose, hydroxypropyl cellulose sodium ferrocyanide, sodium polyphosphates, carob flour, methyl cellulose, sodium trimetaphosphate, methyl ethyl cellulose, sodium tripolyphosphate, microcrystalline wax, tannic acid, petroleum wax, terpene resin, tragacanth, polyethylene, xanthan gum and polyethylene.

Microcapsules are commercially available and are exemplary types of microcapsulation technologies.

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of the type presented by Gutcho, Microcapsules and Microencapsulaction Techniques (1976); Gutcho, Microcapsules and Other Capsules Advances Since 1975 (1979); Kondo, Microcapsule Processing and Technology (1979); Iwamoto and others, AAPS Pharm. Sci. Texch. 2002 3 (3); article 25; U.S. patents US 3,550,598 issued to McGlumphy; 4,889,144 issued to Tateno and others; 5,004,595 issued to Cherukuri and others; 5,690,990 issued to Bonner; 5,759,599 issued to Wampler and others; 6,039,901 issued to Soper and others; 6,045,835 issued to Soper and others; 6,056,992 issued to Lew; 6,106,875 issued to Soper and others; 6,117,455 issued to Takada and others; 6,325,859 issued to DeRoos and others; 6,482,433 issued to DeRoos and others; 6,612,429 issued Dennen; and 6,929,814 issued to Bowmeesters and others; U.S. patent publications us. 2006/0174901 issued to Karles and others and 2007/0095357 issued to Besso and others; and PCT document WO2007 / 037962 issued to Holton and. Suitable types of microcapsules are available from sources such as Microtek Laboratories of Dayton, Ohio. Exemplary types of commercially available microencapsulation types include those marketed under the trade names ULTRASEALMC and PERMASEALmc available in Givaudan, domiciled in Vernier, Switzerland.

As shown in Figures 2-4, embodiments of the smokeless tobacco product may include larger capsules containing any of the additives described herein for use in microcapsules. Exemplary minor spherical capsules have diameters of at least about 0.5 mm, generally at least about 1 mm, often at least about 2 mm and often 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 minor individual capsules weigh at least about 5 mg, often at least about 15 mg and often at least about 25 mg. Exemplary major individual capsules weigh less than about 75 mg, generally less than about 65 mg and often less than about 55 mg.

Representative capsule types are commercially available as "Momints" at Yoshai Enterproises, Inc. and "Ice Breakers Liquid Ice" at The Hershey Company. Representative types of capsules have also been incorporated in chewing gum, such as that sold under the trademark "Cinnaburst" by Cadbury Adams USA. Representative types of capsules and components thereof are also presented in U.S. Pat. us. 3,339,558 issued to Waterbury; 3,390,686 issued to Irby, Jr. and others; 3,685,521 issued to Dock; 3,916,914 issued Brooks and others; 4,889,144 issued to Tateno and others; 6,631,722 issued to MacAdam and others, and 7,115,085 issued to Dube and others; US Patent Publication Nos. 2004/0261807 issued to Dube and others; 2006/0272663 issued to Dube and others; 2006/01330961 issued to Luan and others; 2006/0144412 issued to Mishra and others; 2007/0012327 issued to Karles and others, and 2007/0068540 issued to Thomas and others; PCT documents WO 03/009711 issued to Kim; PCT WO 2006/136197 issued to Hartmann and others; PCT WO 2006/136199 issued to Mane and others; PCT WO 2007/010407 and PCT WO 2007/060543, as well as within filter cigarettes that have been marketed under the trade name "Camel Lights with Mentol Boost" by R.J. Reynolds Tobacco Company. See also the types of capsules and their components considered in U.S. Pat. us. 5,223,185 issued to Takei and others; 5,387,093, issued to Takei; 5,882,680 issued to Suzuki and others; 6,719,933 issued to Nakamura and others and 6,949,256 issued to Fonkwe and others; and U.S. patent application publications No. 2004/0224020 issued to Schoenhard; 2005/0123601 issued to Mane et al .; 2005/0196437 issued to Bednarz and others and 2005/0249676 issued to Scott and others. The capsules may be colored, provided with smooth or rough surfaces, have rigid or collapsible envelopes, have fragile or durable envelopes or other desired features or characters.

The smokeless tobacco product may include other flavoring agents in the form of pearls, pellets, bars, strands, leaves, strips or other objects designed to deliver a predetermined, concentrated amount of a flavoring ingredient to the user. Such forms typically include a carrier material (for example a matrix material), and a flavoring agent dispersed therein, and allow controlled supply of the flavoring agent. For example, representative types of materials and ingredients useful for the manufacture of essentially water insoluble savory beds, strands or pellets can be found within the available cigarette filters such as Camel Dark Mint, Camel Mandarin Mint, Camel Spice Cream, Camel Izmir Stinger, Camel Spice Twist, Camel Mandalay Lime and Camel Aegean Spice from RJ Reynolds Tobacco Company. For example, at least one strip, piece or sheet savored, dispersible or soluble in water (for example a type of edible film that refreshes breathing) can be arranged inside each bag as shown in Figure 3. Such strips or sheets can be folded or squeezed in order to easily incorporate them into the bag, see, for example, the types of materials and technologies considered in US Pat. us. 6,887,307, issued to Scott and others, and 6,923,981 issued to Leung and others; and The EPSA Journal (2004) 85, 1-32.

Although less preferred, a large capsule may be included within a small moisture-permeable net bag, the bag may itself be contained within the outer mesh container of the smokeless tobacco product. In such an embodiment, the tobacco formulation that is inside the bag can be segregated from at least one of the capsules also contained within that bag, as shown in Figure 4.

The tobacco used for the manufacture of tobacco products corresponding to the present invention may vary. Tobacco may include types of tobacco such as hot air cured tobacco, slightly tobacco

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air cured, eastern tobacco, Maryland tobacco, dark tobacco, dark roasted tobacco, air dried dark tobacco (for example, passanda, Cuban, jatín and bezuki tobacco) or light air cured tobacco (for example North Wisconsin tobacco and gallop), and Rustica tobacco, as well as other rare or special tobacco. Various types of tobacco, cultivation practices and harvesting and curing practices are described in Tabacco Production, Chemistry and Technology, Davis and others (editors) (1999). See also the types of tobacco considered in U.S. Pat. US 4,660,577 issued to Sensabaugh, Jr. and others; 5,387,416 issued to White and others, and 6,730,832 issued to Dominguez and others. Most preferably, tobacco materials are those that have been cured and aged properly. Preferred techniques and conditions for curing hot air tobacco by Nestor et al. Are presented in Beitrage Tabakforsch. Int., 20 (2003) 467-475 and in U.S. Pat. no. 6,895,974 issued to Peele. Representative techniques and conditions for curing tobacco in the air are presented by Roton and others, Beitrage Tabakforsch. Int. 21 (2005) 305-320 and Staaf et al. Beitrage Tabakforsch. Int., 21 (2005) 321-330. Certain types of unusual or rare tobacco can be dried in the sun. The ways and methods of improving the smoking quality of oriental tobacco are considered in U.S. Pat. no. 7,025,066 issued to Lawson and others. Representative oriental tobacco includes the katerini, prelip, komotini, xanthi and yambol tobacco. Tobacco compositions that include dark air cured tobacco are considered in U.S. application. Serial No. 11 / 696,416 issued to Marshall et al., Filed April 4, 2007.

The tobacco products of the present invention, such as the embodiments illustrated in Figures 1-4, may incorporate an individual type of tobacco (for example, in the so-called "direct quality" form). For example, tobacco inside a tobacco product may be composed solely of hot air cured tobacco (for example, all tobacco may be composed, or derived, of hot air cured sheets or a mixture of tobacco sheets hot air cured and hot air cured tobacco branches). Tobacco inside a tobacco product may also have a so-called "mixed" form. For example, tobacco inside a tobacco product of the present invention may include a mixture of parts or pieces of hot-cured, slightly air-cured tobacco (e.g., slightly air-cured Malawi tobacco) and oriental tobacco (for example, tobacco composed of, or derived from, tobacco leaflets, or a mixture of tobacco leaflets and tobacco branches). For example, a representative mixture may incorporate about 30 to about 70 parts of lightly air cured tobacco (e.g., sheets or sheets and branches), and

approximately 30 to 70 parts of hot air cured tobacco (for example, branches, sheets, or sheets and

branches) based on dry weight. Other exemplary tobacco blends incorporate about 75 parts of hot air cured tobacco, about 15 parts of lightly cured tobacco and about 10 parts of Eastern tobacco; or about 65 parts of hot air cured tobacco, about 25 parts of lightly cured tobacco and about 10 parts of tobacco

East; or about 65 parts of hot air cured tobacco, about 10 parts of tobacco

lightly cured in air and approximately 25 parts of eastern tobacco, based on dry weight.

The tobacco material may be in the form of parts or pieces of processed tobacco, cured and aged tobacco in essentially natural form of sheets or branch, an extract of tobacco, pulp of extracted tobacco (for example, using water as solvent), or a mixture of the above (for example, a mixture that combines pulp of extracted tobacco with granulated sheets of cured and aged granulated tobacco).

The tobacco that is used for the tobacco product most preferably includes tobacco leaflets or a mixture of tobacco leaflets and branches. Tobacco blends that incorporate a predominant amount of tobacco sheets with respect to branches are preferred. Most preferably, the tobacco sheets and branches are used in a non-extracted form, that is, so that the removable portion (for example the water-soluble portion), is present within the non-removable portion (e.g., the pulp of tobacco) in a manner comparable to that of natural tobacco supplied in a cured and aged form. Most preferably, the tobacco is not supplied in a reconstituted form, extracted form or any form that results from the extraction and recombination of components of that tobacco. However, portions of the tobacco product tobacco may have processed forms, such as processed branches. of tobacco (for example, cut coiled branches, twisted expanded branches with cut or cut domed branches), or expanded volume tobacco (for example, expanded tobacco, such as expanded dry ice tobacco (DIET)). In addition, the tobacco product may optionally incorporate tobacco that has been fermented. See also the types of tobacco processing techniques presented in PCT WO 05/063060 issued to Atchley et al.

If desired, the tobacco material can be reformed and dried and then ground to the desired shape. For example, the tobacco material may be coated with an aqueous solution containing components such as sugars (for example fructose, glucose and sucrose), humectants (for example glycerin and propylene glycol), flavoring ingredients (for example, cocoa and licorice) and Similar. The non-aqueous coating components are preferably applied to tobacco in the amount of about 1% to about 15% by weight in relation to the dry weight of the tobacco.

The tobacco used for the manufacture of the tobacco product is preferably supplied in a shredded, ground, granulated, fine particle or powder form. Most preferably, the tobacco is used in the form of parts or pieces having an average particle size smaller than that of the pieces or pieces of shredded tobacco used in

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Tobacco products called "fine cut". Typically, finely divided tobacco particles or pieces have sizes to pass through a sieve of approximately Tyler 18 mesh, generally have a size to pass through a sieve of approximately Tyler 20 mesh, often have a size to pass to through a sieve of approximately Tyler 50 mesh, they often have a size to pass through a Tyler 60 mesh sieve, they can even have a size to pass through a Tyler 100 mesh sieve, and they can also have a size to pass through a sieve Tyler 200 mesh. If desired, to ensure that small particles of the desired size, or size ranges, can be collected, air sorting equipment can be used. In one embodiment, the tobacco material is in the form of particles of a size capable of passing through a Tyler 18 mesh sieve but not through a Tyler 60 mesh sieve. If desired, pieces of different sizes of granulated tobacco. Typically, very finely divided particles or pieces suitable for snuff products have a particle size greater than Tyler -8 mesh, often a Tyler mesh of -8 to +100 and, frequently, a Tyler mesh of -18 to +60 .

The way in which tobacco is supplied in a finely divided or powder type may vary. Preferably, the tobacco parts or pieces are crushed, ground or pulverized in powder form using crushing, grinding and similar equipment and techniques. Most preferably, the tobacco is relatively dry during crushing or grinding, using equipment such as hammer mills, cutting heads and control mills, or the like. For example, parts or pieces of tobacco can be crushed or ground when the moisture content is less than about 15% by weight to less than about 5% by weight.

The relative amount of tobacco in the tobacco formulation may vary. Preferably, the amount of tobacco in the tobacco formulation is at least about 25% or at least about 30%, based on the dry weight of the formulation. In certain cases, the amounts of other components of the tobacco formulation may exceed approximately 40% based on dry weight. A typical range of tobacco material in the formulation is from about 30 to about 40% by weight.

The moisture content of the tobacco formulation before consumer use of the formulation may vary. Typically, the moisture content of the tobacco formulation, which is present inside the bag before it is introduced into the user's mouth, is less than about 55% by weight, generally less than about 50% by weight, and is often less than about 45% by weight. Certain types of tobacco formulations have a moisture content, before use, of less than about 15% by weight, often less than about 10%, and often less than about 5% by weight. For certain tobacco products, such as those incorporating snuff-type tobacco formulations, the moisture content may exceed 20% by weight, and often exceeds 30% by weight. For example, a representative product of the snuff type may have a tobacco composition having a moisture content of about 25% by weight to about 50% by weight, preferably from about 30% by weight to about 40% by weight.

The way to control the moisture content of the formulation may vary. For example, the formulation can be subjected to thermal or convection heating. As a specific example, the formulation can be oven dried, in hot air, at temperatures of about 40 ° C to about 95 ° C, with a preferred temperature range of about 60 ° C to 80 ° C for an appropriate time for Reach the desired moisture content. Alternatively, tobacco formulations can be moistened using adjustment drums, conditioning cylinders or drums, liquid atomization apparatus, belt mixers, mixers available as FKM130, FKM600, FKM1200, FKM2000 and FKM3000 from Littleford Day, Inc., Plow types Share of mixing cylinders, and the like. Most wet tobacco formulations, such as the types of tobacco formulations used in the types of snuff products, are subsequently subjected to pasteurization or fermentation. The methods for pasteurizing or fermenting types of tobacco products will be known to those skilled in the art of designing and manufacturing snuff products.

The acidity or alkalinity of the tobacco formulation, which is often characterized by pH, may vary. Typically the pH of that formulation is at least about 6.5 and, preferably, at least about 7.5. Typically, the pH of that formulation will not exceed approximately 9 and will often not exceed approximately 8.5. A representative formulation of tobacco has 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 water for high performance chromatography and measuring the pH of the resulting suspension / solution (for example, with a pH-meter)

As indicated before, the tobacco parts or pieces can be irradiated before preparing the tobacco formulation, or those parts or pieces can be pasteurized or otherwise subjected to a controlled heat treatment. In addition, if desired, after preparing all or part of the formulation, the component materials can be irradiated, or such component materials can be pasteurized or otherwise subjected to a controlled heat treatment. For example, a formulation can be prepared, followed by irradiation or pasteurization, and then flavoring ingredient (s) can be applied to the formulation. Alternatively, the tobacco formulation can be irradiated or pasteurized after incorporating the tobacco formulation into

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of a moisture-permeable package or bag (for example, providing individual containers of snuff-type tobacco product of snuff type).

In one aspect, the present invention concerns a method of tobacco treatment. The method involves heat treatment of tobacco used in the preparation of a tobacco formulation suitable for use as a smokeless tobacco formulation. The method involves subjecting the tobacco material, which is preferably in a wet form, to heat treatment. The heat treatment can be carried out in a closed container (for example, one suitable for a controlled atmospheric environment, controlled atmospheric components and a controlled atmospheric pressure), or in a container that is essentially open to atmospheric air. The heat treatment, which is performed by subjecting the tobacco material to a sufficiently high temperature for a sufficient time, has the ability to alter the overall character or nature of the tobacco material in the desired manner. For example, heat treatment can be used to provide the tobacco material with a desired color or visual character, or a desired nature or physical texture. In addition, heat treatment causes the tobacco material to undergo a treatment with a treatment characteristic of the type of pasteurization treatment. As such, certain types and certain amounts of spores, molds, microbes, bacteria and the like may be denatured or otherwise inactivated. Certain components that are inactivated, or that decrease in number, are biological agents (for example, enzymes) that have the ability to promote the formation of tobacco-specific nitrosamines. Pasteurization techniques are presented, for example, in U.S. networks. 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 duration of the heat treatment will decrease as the temperature of the heat treatment increases. It is preferable to avoid excessively high heat treatment temperatures, such as the boiling point of water or higher. However, the temperature of the heat treatment stage can be characterized as high, which means that the temperature is higher than the ambient (for example, greater than 25 ° C). The methods and equipment used to perform the heat treatment may vary. The temperature can be controlled using a jacketed container, direct steam injection into tobacco, hot air bubbling through tobacco and the like. The methods of the invention set forth below can be performed using equipment known in the art such as various mixing devices, including jacketed mixing devices capable of heating the contents of the mixer as well as stirring its contents. Different controlled or aerated pressure mixing containers can be used. Examples of mixers include affordable mixers from Scott Equipment Company, Littleford Day, Inc., Lodige Process Technology and the Bredo Likwifier Division of American Ingredients Company. Examples of containers that provide a controlled pressure 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 models No. 4522 and 4552 described in US Patent No. 4,882,128 issued to Hukvari et al.). Preferred mixers allow direct injection of water vapor into the contents of the mixer. All the steps indicated below can be performed while the tobacco material is stirred or removed. The pressure in the mixing vessel during the process may be atmospheric pressure or elevated pressure, for example, from about 0.69 bar to 69 bar (about 10 psig to about 1,000 psig).

Preferably, the moisture content of the wet tobacco material subjected to heat treatment is at least about 30%, often at least about 35% and, frequently, at least about 40% in relation to the total weight of the formulation of tobacco that undergoes heat treatment. The tobacco material can be moistened by adding aqueous fluids such as water vapor, liquid running water, aqueous sodium chloride solutions and the like. At least to a certain extent the heat treatment step is completed, the wet tobacco material is contacted with a basic material (for example, sodium carbonate, sodium bicarbonate or a mixture thereof) in order to raise the pH to the interval alkaline. When in contact with the basic material, the moisture content of the tobacco material is at least about 30%, often at least about 35% and often at least about 40% in relation to the total weight of the Tobacco formulation Preferably, the tobacco material is cooled somewhat before adding the basic material (for example, it can be cooled to less than about 75 ° C, often less than about 65 ° C, and often less than about 55 ° C). The tobacco mixture is allowed to interact with the basic material while the tobacco material reaches a sufficiently high humidity level until the pH of the tobacco material falls to approximately 8 pH units. The tobacco material is then cooled and dried.

During heat treatment, various flavoring materials may be added to the tobacco material. Exemplary flavoring compositions include various formulations for seasoning and coating, including compositions described in U.S. Pat. us. 5,121,757 issued to White and others; 5,370,139 issued to Shu and others; 5,318,050 issued to Gonzalez-Parra and others; 5,343,879 issued to Teague; 5,413,122 issued to Shu and others; 5,962,662 to Shu and others; 6,048,404 issued to White; 6,298,858 issued to Coleman, III and others; 6,325,860 issued to Coleman, III; 6,428,624 issued to Coleman, III and others; 6,591,841 issued to White and others, and 6,695,924 issued to Dube and others; and in U.S. Patent Application Publication no. 2004/0173228 issued to Coleman, III. Additionally, during the heat treatment processes described here

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in the tobacco composition, several other additives indicated in the patent application publication U, S can be introduced. no. 2004/0250821 issued to Perfetti and others.

Thus, the invention provides several methods for preparing a tobacco material for use in a smokeless tobacco product. In particular, the methods of the invention involve the heat treatment of tobacco and the adjustment of the pH of the tobacco in an adapted manner to improve the storage stability of the sensory characteristics of the smokeless tobacco product. In a method of the invention, a tobacco material is provided in a desired form (for example, in strands or in particles). The tobacco material may comprise a mixture of various types of tobacco, such as a mixture of various sheet tobacco materials (for example, cured sheets, oriental tobacco sheets and the like) and various branch materials (for example, Rustic branch , Kurnool branch, sun-cured Indian branch and the like). The mixture of tobacco materials is typically supplied at a low humidity level, such as from about 5 to about 15% by weight (for example from about 10-12% by weight) in relation to the total weight of tobacco material.

Preferably the tobacco material is combined with a saline material and preferably the saline material is in the form of an aqueous solution. In one embodiment, an aqueous solution of sodium chloride 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 (for example, 35% by weight). If desired, the tobacco material can be heated while the sodium chloride or other salt is added in order to assist by mixing the saline solution with the tobacco material. For example, heating may comprise heating the tobacco material to a temperature of at least about 60 ° C, typically from about 60 ° C to about 65 ° C.

The wet tobacco material with the optional saline component is then subjected to a heat treatment step that involves heating the tobacco material for a time and at a temperature sufficient to pasteurize the tobacco as described above. Examples of heating temperatures are temperatures of about 85 ° C and above, such as from about 85 ° C to 100 ° C, more typically from about 90 ° C to about 95 ° C. The exposure time to the temperature of Pasteurization may vary, but typically it is at least about 1 hour, as it can be from about 1 hour to about 3 hours. In one embodiment, the heating of the tobacco is carried out by increasing the temperature of the jacket of the mixer maintaining the tobacco material and directly injecting water vapor to the tobacco material. Water vapor injection will typically result in an increase in the moisture content of tobacco during the heating stage. Typically, the moisture content of the tobacco material is maintained during the heating stage at a constant humidity level or allowed to rise slightly, such as a level of at least about 30% by weight, such as about 30% at about 40% by weight (for example, about 35% by weight). In other words, tobacco is kept in a wet state during the heating stage.

Following the heat treatment stage, the tobacco material is typically cooled before adding a base in order to increase the pH of the material. The temperature of the tobacco material is typically reduced to about 60 ° C to about 65 ° C. Then a base is added to the tobacco material and mixed intimately with the tobacco material. The base can be any material capable of raising the pH of the tobacco material to an alkaline pH range (for example from about 9 to about 10). Examples of bases include alkali metal hydroxides, alkali metal carbonates, alkali metal bicarbonates and mixtures thereof. Specific basic materials that can be used include sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, potassium hydroxide and mixtures thereof.

Typically the base is added in the form of an aqueous solution and the base addition step typically results in an increase in the moisture content of the tobacco material. In one embodiment, sufficient base is added to the tobacco material so that the pH of the tobacco material is at least about 8.7, such as a pH of about 8.7 to about 10. Often, the final moisture content is from about 40% to about 55% by weight, often from about 45% by weight to about 50% by weight.

After the addition of the base and water, the resulting wet tobacco material, of adjusted pH, is heated to an elevated temperature, such as a temperature of at least about 55 ° C, often at a temperature in the range of about 55 ° C to about 95 ° C, more frequently from about 65 ° C to about 75 ° C. During the heating stage, the moisture level of the tobacco material is kept relatively constant or allowed to rise slightly in order to promote it 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, from about 40% to about 55% by weight, often from about 45% by weight to about 50% by weight. . In order to prevent a significant loss of moisture during this stage, the mixing vessel containing the tobacco material, typically, is not vented with the atmosphere, although it may be allowed to pass

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Small stream of filtered air through the header space of the mixer to remove the ammonia that forms as the base reacts with the acidic materials of the tobacco material.

The heating step following the base addition will typically continue for at least about 1 hour and will often continue from about 1 hour to about 3 hours. During this step it is preferable to allow the pH to fall below about 8.5, such as from about 8.0 to about 8.5 (for example, about 8.1, about 8.2, about 8.3, about 8.4 or about 8.5). Typically, by following and controlling the level of humidity and temperature of the tobacco during this heating stage, it is possible to maintain a reasonable pH decrease rate as the base continues to react with the acidic materials of the wet tobacco. In one embodiment, the rate of pH decrease is maintained at about 0.05 to about 0.15 pH units per hour, more typically from about 0.08 to about 0.10 pH units per hour (for example, at approximately 0.09 pH units per hour).

After the previous heating stage, the wet tobacco material is dried by continuously heating the tobacco material while the mixing vessel is purged so that water vapor is removed. Typically this step involves heating the tobacco material to a moderately high temperature, such as a temperature of at least about 35 ° C, often from about 35 ° C to about 70 ° C, more frequently from about 55 ° C to about 65 ° C. The duration of the drying step may vary, but typically it is from about 20 hours to about 24 hours. The final moisture content of the tobacco material after drying is often less than about 35% by weight, such as from about 25% to about 35% by weight, often from 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.

In an alternative method, the tobacco material is initially mixed with a large excess of water to form a mixture that has a relatively high moisture content, which can be characterized as a suspension, before heat treatment. Typically, the suspension contains at least about 75% by weight of water and, frequently, at least about 80% by weight of water. In one embodiment, the suspension of the tobacco material comprises from about 75% to about 95% by weight of water. Optionally, the suspension is mixed with a saline material such as an aqueous solution of sodium chloride. The saline material is typically added in an amount of about 1 to about 8% by weight (for example, about 1% to about 3% by weight) of the tobacco material, based on the weight of the dry tobacco material.

Following the optional addition of a saline material, the suspension is heated in order to pasteurize the tobacco material. The heating step typically comprises heating the tobacco suspension to a temperature of at least about 60 ° C, such as a temperature of about 60 ° C to about 100 ° C, more frequently from about 70 ° C to about 90 ° C ( for example, at about 75 ° C). The duration of the heating may vary, but will typically be at least about 30 minutes, such as from about 30 minutes to about 1 hour.

After the heating stage and, typically while the suspension is still at high temperature, a basic material is added. As indicated above, the basic material is typically in the form of an aqueous solution and the base can be any basic material, such as the materials mentioned above. In one embodiment, the base is added in an amount of about 3 to about 11% by weight in relation to the dry weight of the tobacco material. Sufficient base is added so that the pH of the suspension reaches a pH in the alkaline range, such as at least about 8.5 and, typically, at least about 9.0. An exemplary pH range for the resulting suspension after adding the base is from about 8.5 to about 11, more frequently from about 9 to about 10. After the addition of a base, the suspension is stirred and heated to a high temperature, such as at least about 60 ° C, for a time sufficient for the pH of the suspension to drop approximately 0.5 pH units. Typically, the heating time will be at least about 1.5 hours, such as a time in the range of about 1.5 hours to about 3.0 hours. The temperature of the heating stage will typically be in the range of about 70 ° C to about 95 ° C. The final pH of the suspension after this heating stage will be in the range of about 8.0 to about 8.5 ( for example, about 8.1, about 8.2, about 8.3, about 8.4 or about 8.5). Without implying any operational theory, it is believed that adjusting the pH of the tobacco material while in the form of an aqueous suspension results in a greater interaction between acidic materials of the tobacco and the added base, which in turn increases the pH storage stability of the final smokeless tobacco product.

Subsequently, the suspension can be cooled to room temperature, such as at a temperature below about 35 ° C. If desired, during or after cooling a humectant such as glycerol, propylene glycol or sugar alcohol can be added (for example, maltitol syrup). Then the tobacco material is dried. In

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one embodiment, the drying step that involves casting the suspension on a conveyor belt (for example, a stainless steel belt) and passing the tobacco through a drying zone that operates at a temperature of about 85 ° C to about 285 ° C. The typical residence time of the tobacco material in the drying zone is about 2 to about 5 minutes. Alternatively, the speed of the belt through the drying zone or tunnel can be 7.6 m / min to 16.8 m / min (approximately 25 to approximately 55 feet / min). The final moisture content of the dried tobacco material is typically from about 5 to about 15% by weight, often from about 10% to about 12% by weight. Drying techniques for tobacco material are indicated, for example, in U.S. Pat. us. 4,941,484, issued to Clapp and others; 5,005,593, issued to Fagg et al., And 5,234,008 issued to Fagg.

In another example of a heat treatment method of a tobacco mixture having a high moisture content, a smokeless tobacco formulation is prepared using tobacco treated in a manner similar to that of a reconstituted tobacco paper method, such as described in US patents us. 5,159,942 and 5,445,169 issued to Brinkley. In this method, the tobacco is subjected to high temperature aqueous extraction in order to separate the tobacco material into a solid portion and an extract portion, in which the extract portion typically has a relatively low solids content ( for example about 3-6% solids). The extraction time and temperature may vary, but typically the temperature is at least about 60 ° C, such as a temperature of about 60 ° C to about 100 ° C, more frequently from about 70 ° C to about 90 ° C (for example, from about 75 ° C), and the time is typically from about 30 minutes to about 1.5 hours. The aqueous solution used to extract the tobacco material typically contains a salt and a basic material, such as about 3 to about 8% by weight of a salt (for example sodium chloride) and about 1 to about 5% by weight of a base (for example, sodium hydroxide), in relation to the weight of tobacco. Then, preferably the extract is cooled (for example to about 65 ° C) and optionally neutralized by adding a base (for example, about 3.5% sodium hydroxide and about 3.5% potassium carbonate by weight of tobacco). After the neutralization step, the pH of the extract can change from about 9.0-9.5 to about 8.0-8.5. Subsequently, the extract can be concentrated, for example by evaporation in vacuo, forming a concentrated extract with a relatively high solids content, such as about 30-35% solids. After evaporation, the concentrated extract is optionally mixed with a humectant (for example, approximately 6% glycerin and then added to the portion of solids extracted. The resulting tobacco material can be dried to reduce the moisture content, by example at about 10 to about 12% humidity The drying step can be performed, for example, using a forced air oven at a temperature of about 85 ° C to about 100 ° C.

Using any of the thermal treatment methods indicated above, the tobacco material is allowed to mix intimately with the basic material in a humid environment for a sufficient time to promote a significant interaction between the acidic and basic species within the tobacco. Significant drying of tobacco is avoided until there has been sufficient contact between the tobacco and the base. As a result, it is believed that the above methods lead to greater stability in maintaining the sensory characteristics of tobacco products formed using tobacco materials treated in accordance with these methods and, in particular, it is believed that using the methods of invention, greater storage stability of the pH of the final product can be achieved.

Following any of the methods described above, the resulting tobacco material can be mixed with additional flavoring agents, including sweeteners. Various flavoring agents and water may be added as necessary to adjust the taste and moisture content so that the tobacco material has the desired moisture content of the final product, which can be varied as indicated above. In one embodiment, the moisture content of the tobacco composition is raised to at least 25% by weight at this stage.

If desired, all tobacco material, or part thereof, used in the smokeless tobacco products of the invention can be roasted to favorably alter the sensory characteristics of the resulting product. A typical roasting method, which can be performed before or after the thermal method described above, comprises heating a relatively dry tobacco material (for example, having a moisture content of about 5% to about 20% by weight) to a elevated temperature (from about 85 ° C to about 300 ° C) for a time sufficient to toast the tobacco material, such as a period of about 1 hour to about 3 hours. The tobacco can be mixed with a base and / or sugars (for example, glucose, fructose, sucrose, high fructose corn syrup, caramel, rhamnose, or mixtures thereof), or sugar alcohols (for example, maltitol, mannitol, xylitol, sorbitol and mixtures thereof) before heating in order to promote Maillard reactions during heating. See exemplary roasting conditions in for example, U.S. Pat. us. 4,534,372 issued to White and 4,596,259 issued to White and others.

The tobacco used for the manufacture of the tobacco product can also be processed, mixed, formulated, combined and mixed with other materials or ingredients, including non-encapsulated amounts of any of the additives

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which can be used in the microcapsules discussed here. For example, the tobacco composition may incorporate salts, sweeteners, binders, colorants, pH adjustment agents, fillers, oral care additives, flavoring agents, disintegration aids, antioxidants, humectants and preservatives. See, for example, the components, combinations of components, relative amounts of those components and representative ingredients relating to tobacco, and ways and methods for employing those components set forth in PCT application WO2007 / 037962.

The relative amounts of the various components of the tobacco formulation, including the amount of the additive within the core region of the microcapsules, may vary. The amounts presented here are total amounts of each type of additive and may represent encapsulated components (or forms otherwise separated) and non-encapsulated components. In other words, the smokeless tobacco products of the invention can include any of the various amounts of additive only in the form of a non-encapsulated additive, or in the form of a mixture of encapsulated and non-encapsulated additive.

Most preferably, a sweetener is used in sufficient amounts to provide the desired flavor characteristics to the tobacco formulation. When present, a representative amount of sweetener, be it an artificial sweetener and / or natural sugar, can be at least about 1% to about 3% of the total dry weight of the formulation. Preferably, the amount of sweetener in the formulation will not exceed about 40%, often will not exceed about 35% and often will not exceed about 30% by weight of the total weight of the formulation.

A microencapsulated additive (or otherwise separated) containing tobacco, such as particulate tobacco or a tobacco extract, is preferably present in sufficient quantity to provide the desired attributes to the tobacco formulation. The microencapsulated tobacco-containing additive is often present in an amount of at least about 5% of the total dry weight of the formulation, more typically at least 10%. The amount of microencapsulated additive containing tobacco is typically less than about 50% by weight, often less than about 40% by weight, and often less than about 30% by weight of the total dry weight of the formulation.

Embodiments of the invention that include encapsulated (or otherwise separated) water typically include a quantity of water in microencapsulated form of at least about 10%, typically of at least about 15% and, frequently, of at least about 20%, in relation to the total weight of the formulation. The amount of microencapsulated water is typically less than about 35%, often less than less than about 30%, and often less than about 25%.

Preferably, an additive derived from a herbal or botanical source is used in an amount sufficient to supply the 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. When present, a representative amount of additive is at least about 1% to about 3% of the total dry weight of the formulation. Preferably, the amount of additive in the formulation will not exceed about 40%, often will not exceed about 35% and, frequently, will not exceed about 30% of the total dry weight of the formulation.

A binder in sufficient quantity can be used to provide physical attributes and physical integrity to the formulation. When present, a representative amount of binder may be at least about 1% to at least about 3% of the total dry weight of the formulation. Preferably, the amount of binder in the formulation will not exceed about 20% of the total dry weight of the formulation. Frequently, the amount of binder in a desirable formulation will not exceed approximately 15% and, frequently, will not exceed approximately 10% of the total dry weight of the formulation.

A disintegration aid in sufficient quantity can also be employed to control the desired physical attributes of the tobacco formulation, such as, for example, by providing loss of physical integrity and dispersion of the various component materials after contacting the formulation. with water (for example, by swelling after contact with water). When present, a representative amount of disintegration aid can be at least about 1% to at least about 10% of the total dry weight of the formulation. Preferably, the amount of disintegration aid in the formulation will not exceed about 50% and often will not exceed about 30% of the total dry weight of the formulation.

A dye in sufficient quantity can be used to impart the desired visual attributes to the tobacco formulation. When present, a representative amount of dye may be at least about 1% to at least about 3% of the total dry weight of the formulation. Preferably, the amount of dye in the formulation will not exceed about 30% and often will not exceed about 10% of the total dry weight of the formulation.

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Preferably a charge in sufficient quantity is used to provide the tobacco formulation with the control of desired physical attributes and sensory attributes. When present, be it an organic and / or inorganic filler, a representative amount of filler can be at least about 5% to at least about 15% of the total dry weight of the formulation. Preferably, the amount of filler in the formulation will not exceed about 60% and often will not exceed about 40% of the total dry weight of the formulation.

A buffer or pH adjusting agent can be used in the tobacco formulation. When present, a representative amount of buffer or pH adjusting agent may be at least about 1% to at least about 3% of the total dry weight of the formulation. Preferably, the amount of buffer or pH adjusting agent in the formulation will not exceed about 10% and often will not exceed about 5% of the total dry weight of the formulation.

Preferably a non-sweetening flavoring agent is used in an amount sufficient to supply the desired sensory attributes to the tobacco formulation. When present, a representative amount of flavoring agent (eg, vanilla) may be at least about 1% to at least about 3% of the total dry weight of the formulation. Preferably, the amount of flavoring ingredient will not exceed about 15% and often will not exceed about 5% of the total dry weight of the formulation.

A salt in sufficient quantity can be used to supply the desired sensory attributes to the tobacco formulation. When present, a representative amount of salt may be at least about 1% to at least about 3% of the total dry weight of the formulation. Preferably, the amount of salt will not exceed about 10% and often will not exceed about 5% of the total dry weight of the formulation.

An antioxidant can be used in the tobacco formulation. When present, a representative amount of antioxidant may be at least about 1% to at least about 3% of the total dry weight of the formulation. Preferably, the amount of antioxidant will not exceed about 25% and often will not exceed about 10% of the total dry weight of the formulation.

A preservative can be used in the tobacco formulation. When present, a representative amount of salt preservative may be at least about 0.1% to at least about 1% of the total dry weight of the formulation. Preferably, the amount of preservative will not exceed about 5% and often will not exceed about 3% of the total dry weight of the formulation.

The tobacco formulation may incorporate at least one ingredient for oral care (or a mixture of such ingredients) that provides the ability to inhibit tooth decay or death, inhibit gum disease, relieve mouth pain, whiten teeth or otherwise inhibit the fouling of teeth, promote salivary stimulation, inhibit bad smell of breath, refresh breathing or the like. For example, effective amounts of ingredients such as thymol oil, eucalyptus oil and zinc (for example, such as commercially available ingredients such as ZYTEX® from Discus Dental) can be incorporated into the formulation. Other exemplary ingredients that can be incorporated in effective amounts in tobacco-containing formulations include those that are incorporated into the oral care types indicated by Takahashi et al., In Oral Microbiology and Immunology, 19 (1), 61-64 ( 2004); U.S. patent no. 6,083,527 issued to Thistle; and U.S. patent application publications us. 2006/0210488 issued to Jakubowski and 2006/02228308 issued to Cummings and others. Examples of other ingredients of a formulation containing tobacco include those contained in formulations marketed as MALTISORB® by Roquette and DENTIZYME® by NatraRx. When present, a representative amount of the care additive is at least about 1%, often at least about 3%, and often at least 5% of the total dry weight of the formulation. Preferably, The amount of oral care additive in the formulation will typically not exceed about 30%, often will not exceed about 25% and often will not exceed about 20% of the total dry weight of the formulation.

Representative tobacco formulations may incorporate about 25 to about 60% tobacco, about 1 to about 5% of an artificial sweetener, about 1 to about 5% dye, about 10 to about 60% organic filler and / or inorganic, from about 5 to about 20% disintegrant adjuvant, from about 1 to about 5% binder, from about 1 to about 5% of a pH adjusting agent / buffer, a flavoring ingredient in an amount of up to approximately 10%, preservative in an amount of up to 2% and salt in amount of up to 5%, in relation to the total dry weight of the tobacco formulation. The particular percentages and the choice of ingredients will vary depending on the flavor, texture and other desired characteristics.

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The manner in which the various components of the tobacco formulation can be combined may vary. The various components of the formulation can be contacted, combined to be mixed together in conical type mixers, mixing drums, belt mixers or the like. Thus, the overall mixing of the various components with the components of the tobacco powder can be relatively uniform in nature. See, for example, the types of methodologies set forth in U.S. Pat. no. 4,148,325 issued to Solomon and others; 6,510,855 issued to Korte and others; and 6,834,654 issued to Williams. Modes and methods for formulating snuff-type snuff formulations will be known to those skilled in the art of snuff snuff production.

Although the tobacco composition is most preferably supplied in a manner that is characteristic of the snuff-type product as defined with reference to the accompanying drawings, the tobacco composition may also have the form of wet loose snuff, dry loose snuff, tobacco for chewing, pieces of pelletized tobacco, strips or pieces of extruded tobacco, finely divided ground powders, finely divided or crushed agglomerates of pieces and powdered parts, pieces in the form of scales (for example, which can be formed by agglomeration of components of a formulation of fluidized bed tobacco), pieces of molded processed tobacco (for example, generally shaped as coins, cylinders, beams, cubes or the like), rubber pieces containing tobacco, products incorporating mixtures of edible material with pieces of tobacco and / or tobacco extract, products incorporating tobacco (for example in the form of tobacco extract) supported by a sub non-edible solid ato, and the like. For example, the tobacco composition may be in the form of compressed tobacco pellets, multilamellar extrudates, extruded rods or sticks, compositions having a type of tobacco formulation surrounded by a different type of tobacco formulation, tape type film cylinders , films or strips easily soluble or dispersible in water (see, for example, publication of US patent application No. 2006/0198873 issued to Chan et al.), or capsule-type materials having an outer shell (for example, a hard or foldable outer wrap that can be transparent, colorless, translucent or very colored in natural color), and an inner region that has tobacco or tobacco flavor (for example, a Newtonian fluid or a thixotropic fluid that incorporates some form of tobacco) .

Thixotropic tobacco compositions, such as compressed tobacco pellets, can be produced by compacting granulated tobacco and associated formulation components, compacting these components to pellets and optionally coating each pellet with a covering material. Exemplary granulation devices are available such as the FL-M series of granulation equipment (eg FL-M-3) from Vector Corporation, and as Wp 120V and WP 200VN from Alexanderwek, Inc. Compaction devices are available, by for example, compaction presses such as Colton 2216 and Colton 2247 from Vector Corporation and as 1200i, 2200i, 3200, 2090, 3090 and 4090 from Fette Compacting. Devices are available to provide outer coating layers to pelletized tobacco formulations, such as those designated CompuLab 24, CompuLab 36, Accela-Cota 48 and Accela-Cota 60, from Thomas Engineering.

Processed tobacco compositions, such as multilayered tobacco pellets, can be manufactured using a wide variety of extrusion techniques. For example, multilamellar tobacco pellets can be manufactured using coextrusion techniques (for example, using a double shaft extruder). In such a situation, successive components, or mixtures of components, wet or dry, can be placed inside the extrusion hopper. Water vapor, gases (for example, ammonia, air, carbon dioxide and the like) and humectants (for example, glycerin or propylene glycol) can be injected into the extrusion drum as each dry mixture is propelled, plasticized and cooked. Thus, the various components are processed so that they mix well and, therefore, are completely in contact with each other. For example, the contact of the components is such that the individual components may be well embedded in the extrusion die or the extrudate. See, for example, U.S. Pat. no. 4,821,749 issued to Toft and others. Multilamellar materials can have the general form of films and, alternatively, generally spherical multilamellar materials can have several layers that extend from the inside out.

Certain tobacco compositions may incorporate tobacco as the main component. Preferably, these compositions leave no residue, in any case in substantial amount, in the user's mouth. Preferably, these compositions do not leave a slippery or viscous sensation in the mouth of the user (due to an excessively high level of binders). Tobacco materials can be treated during processing with buffers or other suitable agents so that natural pectins can be released from the tobacco material. The release of natural tobacco pectin can act by reducing the amount of additional gums / hydrocolloids, cellulose-derived or starch-based binders, necessary to assist in achieving the desired tensile strengths of the sheet or film. For example, to release pectin, fine tobacco powder is subjected to cooking in a solution with alkaline adjusted pH at elevated temperatures relative to room temperature. Such treatment can also provide desired sensory attributes to the tobacco material. See, for example, U.S. Pat. us. 5,099,864 issued to Young and others; 5,339,838 issued to Young and others, and 5,501,237 issued to Young and others.

A representative type of tobacco formulation has an envelope and an inner region in the form of a tobacco formulation. A representative outer shell can be achieved by providing a liquid mixture of alginates.

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(for example, sodium alginates available as Kelvis, Kelgin and Mannucol from International Specialty Products Corp.), rice starch, sucralose, glycerin and flavoring agent (for example, mint flavor) in water to result in a liquid mixture presenting a liquid Brookfield viscosity at 25 ° C from about 20,000 to about 25,000 centipoise. The viscous mixture can be used in the form of a sheet that can be shaped as an outer layer (for example, using a Villaware Imperia Pasta Machine, Dough Roller 150 equipped with a Villaware Ravioli accessory for Imperia 150-25, each available at through Imperia Trading Company), or semicircular wraps that can be combined (for example, by exposure to heat) forming an outer layer. Typically, such a viscous mixture can be suitably dried by heating at about 60 ° C for about 1 hour. A wide variety of tobacco formulations can be incorporated into that outer shell. A representative tobacco formulation used as an interior region is a wet or dry mixture of granulated or ground tobacco material that can be mixed with other ingredients, such as flavoring agents, humectants, fillers, pH adjusting agents, dispersive aids and the like.

A representative tobacco formulation is in the form of a soft gel or gel. That tobacco formulation can be obtained by mixing granulated or ground tobacco material, kappa-carcinogen, Kelvis-type sodium alginate, propylene glycol and flavoring agent (e.g. menthol and cinnamon) in water, so that the moisture content of the formulation is about 40 to about 50% by weight.

A representative tobacco formulation is in the form of a fluid. This tobacco formulation can be obtained by mixing granulated or ground tobacco material, glycerin, propylene glycol, kappa-carcinogen, carboxymethylcellulose available as Ticalose 1500 from TIC Gums and microcrystalline cellulose (for example, Ticacel HV from TIC Gums) in water, so that The moisture content of the formulation is from about 60 to about 70% by weight.

In certain embodiments, in particular when the tobacco is in the form of a pellet or other processed form, it may be desirable to treat the tobacco material of the smokeless tobacco product with a bleaching or oxidizing agent in order to alter the color of the material of tobacco. In some embodiments, it may be desirable to bleach the tobacco to a lighter color so that any residue left in the user's mouth after using the product is less visible and less likely to stain fibrous materials such as clothing that may have contact. With the residue Examples of bleaching materials include hydrogen peroxide, ozone or ammonia. Methods for treating tobacco with bleaching agents are discussed in, for example, U.S. Pat. us. 787,611 issued to Daniels, Jr .; 1,086,306 issued to Oelenheinz; 1,437,095 issued to Delling; 1,757,477 issued to Rosenhoch; 2,122,421 issued to Hawkinson; 2,148,147 issued to Baier; 2,170,107 issued to Baier; 2,274,649 issued to Baier; 2,770,239 issued to Prats and others; 3,612,065 issued to Rosen; 3,851,653 issued to Rosen; 3,889,689 issued to Rosen; 4,143,666 issued to Rainer; 4,194,514 issued to Campbell; 4,366,824 issued to Rainer and others; 4,388,933 issued to Rainwer and others; and 4,641,667 issued to Schmekel et al .; and PCT document wO 96/31255 issued to Giolvas.

The type of bag used to contain the tobacco formulation may vary and, in fact, in certain embodiments a bag may be unnecessary. For example, tobacco formulations that are in the form of a tobacco pellet or other processed form of a size already established for individual use may not require to be contained in a bag. Instead, the pellets or other processed forms can simply be packaged in an outer container without using a tobacco bag by dividing the tobacco formulation into individual sizes.

Packages, bags or containers of the type used to manufacture smokeless tobacco products are available under the trade names "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 bags and packaged using the types of components used for the manufacture of conventional snuff product types. The wool bag provides a liquid permeable container of a type that can be considered to have a character similar to a type of mesh type material that is used to make a tea bag. The components of a loose granular tobacco formulation readily diffused through the bag to the user's mouth.

In certain embodiments, an exemplary bag can be manufactured from materials, and in such a way, that during use by the user the bag experiences a controlled dispersion or dissolution. Such bag materials may have the form of mesh, net, perforated paper, permeable fabric or the like. For example, the bag material made from mesh-type rice paper, or perforated rice paper, can dissolve in the user's mouth. As a result, the bag and the formulation of tobacco, each of them, can undergo a complete dispersion in the mouth of the user under normal conditions of use and, therefore, the user can ingest them. Other exemplary bag materials can be manufactured using water-dispersible film-forming materials (for example, binder materials such as alginates, carboxymethyl cellulose, xanthan gum, pululane and the like), as well as materials in combination with materials such as ground cellulosic compounds (for example, wood pulp with a fine particle size). Preferred bag materials, although dispersible or

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soluble in water, they can be designed and manufactured in such a way that, under normal use, a significant amount of the content of the tobacco formulation permeates through the material of the bag before the time in which the bag loses its physical integrity. If desired, flavoring ingredients, disintegration aids and other desired components may be incorporated into the bag, or they may be applied to the bag material.

In the publication of the U.S. patent application no. 2004/0118422 issued to Lundin and others, various types of products and components of them are described. See also, for example, U.S. Pat. US 4,607,479 issued to Lundin; 4,631,899 issued to Nielsen; 5,346,734 issued to Wydick, and 6,162,516 issued to Der .; and U.S. patent application publication no. 2005/0061339 issued to Hansson and others. See also the types of representative bags and the material of the bag or wool in U.S. Pat. no. 5,167,244 issued to Kjerstad. Types of product snuff can be manufactured using equipment such as SB 51-1 / T, SBL 50 and SB 53-2 / T from Merz Verpackungsmaschinen GmbH, which can be suitably modified with a capsule insertion apparatus of the general type described in US patent application publication no. 2007/0068540 issued to Thomas and others. The snuff bags can be supplied as individual bags or a plurality of bags can be connected or connected (for example, 2, 4, 5, 10, 12, 15, 20, 25 or 30 bags), (for example in an extreme manner at the end) an individual bag or portion of a string or matrix of bags can be easily separated for use.

The bags containing the tobacco formulation are preferably packaged in an outer container that is tightly closed, made of a suitable material such that the atmospheric conditions within the package are modified and / or controlled. That is, the closed container can provide a good barrier that inhibits the passage through it of compositions such as moisture and oxygen. In addition, the atmosphere inside the closed container can be modified by introducing into the package, before closing, a selected gaseous species (for example, nitrogen, argon or a mixture thereof). Thus, the atmospheric conditions to which the tobacco composition is exposed are controlled during preparation, packaging, storage and handling.

The present invention may involve the use of equipment, materials, methodologies and process conditions that are suitably modified in order to provide controlled packaging and atmospheric conditions for the tobacco products that are packaged. The atmosphere within the packaging materials can be modified in different ways. For example, a significant amount of the atmosphere inside the container can be removed (for example, using vacuum packaging techniques), or the atmosphere within the atmosphere can be altered in a controlled manner (for example using purge techniques with gas streams) container. Representative aspects of various technologies associated with modified atmosphere packaging and controlled atmosphere packaging are presented in Analysis and Evaluation of Microbial Hazards on Fresh and Fresh-Cut Product; Chapter VI; Microbiological Safety of Controlled and Modified Atmosphere Packaging of Fresh and Fresh-Cut Product; U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition (Sept. 30, 2001).

Controlled or modified atmospheres within the packaged tobacco products of the present invention may vary. Typically, when the tobacco product is vacuum packed or gas purged to achieve a controlled or modified atmosphere (for example, even if the atmosphere is controlled so that the atmospheric pressure inside the closed container is positive with respect to atmospheric pressure ), the atmospheric conditions within the package are controlled so that a significant amount and, most preferably, all of the oxygen present inside the package is removed from that package before the container is closed. This is, less than about 8% and, frequently, less than about 6%, of the weight of the controlled atmosphere initially present in a closed outer container is composed of oxygen. For example, when the container is closed, the atmosphere present inside the package can preferably have less than about 5% oxygen, and most preferably between about 1% oxygen and about 5% oxygen, relative to the weight of the controlled atmosphere initially present inside the closed container. Typically, when the tobacco product is purged with a gaseous species (for example, a selected gas or a selected gas mixture), a significant amount and, most preferably virtually all, of the atmosphere inside the closed container has been supplied. by the desired gaseous species. Examples of gas species include nitrogen, argon, carbon dioxide and the like (for example, high purity gases, of a purity of more than about 99% by weight). Alternatively, the atmosphere at which the tobacco product incorporates a relatively high level of a desired gaseous species (eg oxygen) in order to introduce the effects of "gas shock" to the tobacco product (for example, may be desirable relatively high levels of oxygen in the atmosphere for the introduction of "gas shock" in order to inhibit enzymatic discoloration, prevent anaerobic fermentation reactions and inhibit anaerobic microbial growth). For example, a controlled atmosphere containing an amount of oxygen such that the level of oxygen in that atmosphere, greater than about 25% by weight, often greater than about 30% by weight, can provide adequate conditions to introduce the "oxygen shock "

Representative equipment useful for performing the process steps associated with the packaging methods described herein is available from Winpak Ltd. (for example, systems identified as LD32, L25, L18 and L12); such as Linium 300 horizontal development packaging systems from Doboy Inc. (for example, Linium models nos. 301, 302, 303, 304 or 305); as Hiwrap 504 systems available from Hitech Systems s.r.l .; and as the types of systems

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available at Rovema Verpackungsmaschinen GmbH. Preferred equipment supplies a packaging material that provides a closure that does not allow the passage of gases or moisture through it (for example, a seal that can be considered "air impermeable").

Bags containing the tobacco formulation, whether optionally closed in an air-impermeable outer container as discussed above, or not, can be packaged in a hard container that serves as the outermost container or container. A representative hard container is the short, rounded edge container, generally cylindrical, traditionally used for the marketing of snuff-type products. See, for example, representative types of "snuff packs" of designs considered in PCT WO 2005/016036 issued to Bjorholm. Other types of containers that can be modified appropriately are metal or plastic containers presented in U.S. Pat. no. 7,014,039 issued to Hanson and others. See also the types of hard containers used for commercial distribution of Camel Snus by R.J. Reynolds Tobacco Company; Revel Mint Tobacco Packs of smokeless tobacco product by U.S. Smokeless Tobacco Corporation; SkoalDry by U.S. Smokeless Tobacco Co., and "taboka" by Philip Morris USA. If desired, the type of container used for the "taboka" product can be adapted to have a sliding type lid (for example, which generally slides parallel to the longitudinal axis of the container) so that the container is I can open and close. If desired, the container may have an accordion or bellows design type; in this way, the container can be extended to fill it with the smokeless tobacco product during production and then contract it after filling it. If desired, the containers can be equipped with suitable closures or eyelets so that, when an open container is closed again, a good closure is had.

When using it, the hard container is opened, the outer container is opened, a bag is taken out of it and the consumer enjoys the bag. The hard container is manually closed again and additional bags are removed to suit the consumer.

The amount of tobacco formulation incorporated into the closed outer container may vary. In one aspect, the loose tobacco composition can be incorporated into the outer container, the container is closed and the loose tobacco can be used as a loose snuff or as chewing tobacco when the container is opened. In another aspect, but preferred, the tobacco composition contained in the snuff-type bag or package is incorporated in the outer package, the container is closed and the snuff-type product can be used when the outer container is opened.

Typically, the amount of tobacco formulation in each individual portion (eg, in each bag) is such that there is at least about 50 mg, often at least about 150 mg and, frequently, at least about 250 mg of dried tobacco; and less than about 700 mg, often less than about 500 mg, and often less than about 300 mg of dry tobacco weight. For example, snuff-type tobacco products of the snuff type may have the form of the so-called "snuff portion". In a typical embodiment, the amount of tobacco formulation in each bag is between about 100 mg and about 400 mg.

An exemplary snuff type product has approximately 1 g of a tobacco formulation having a moisture content of approximately 35% by weight; formulation of tobacco contained in a wool bag that has a total length of approximately 30 mm, a width of approximately 16 mm and a height of approximately 5 mm, the length of the compartment area of that bag being approximately 26 mm due to a closure of a width of approximately 2 mm at each end of that bag. Another exemplary product of the snuff type product has about 0.5 g of a tobacco formulation having a moisture content of about 35% by weight; Tobacco formulation that is contained in a sealed wool bag that has a total length of approximately 26 mm, a width of approximately 12 mm and a height of approximately 5 mm, the length of the compartment area of that bag being approximately 22 mm due to a closure of a width of approximately 2 mm at each end of that bag.

Various components of snuff types of products and their components are described, as well as of packing structures for snuff products in U.S. Patent Application Publication. 2004/0118422 issued to Lundin and others, which is incorporated herein by reference. See also, for example, U.S. Pat. us. 4,607,479 issued to Linden; 4,631,899 issued to Nielsen; 5,346,734 issued to Widick et al .; and 6,162,516 issued to Der .; U.S. patent application publications us. 2005/0061339 issued to Hansson and others; 2007/0095356 issued to Winterson and others; and 2007/0062549 issued to Holton, Jr. and others; PCT document WO 2007/057789 issued to Sweeney and others; Wo 2007/057791 issued to Neidle and others; and PCT application WO 2008/016520. See also the types of bags considered in U.S. Pat. no. 5,167,244 to Kjerstad.

The products of the present invention can be packaged and stored in the same manner as conventional types of smokeless tobacco products are packaged and stored. For example, a cylindrical container may contain a plurality of packages or bags. If desired, wet tobacco products (for example, products having a moisture content of more than about 20% by weight) can be refrigerated (for example, at temperatures below about 10 ° C, often below about 8 ° C and sometimes less than about 5 ° C). Alternatively, frequently relatively tobacco products

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Dried (products that have moisture contents of less than about 15% by weight) can be stored at a wide range of temperatures.

The following examples are presented to illustrate other aspects associated with the present invention, but should not be construed as limiting the scope thereof. Unless otherwise indicated, all parts and percentages are by weight.

EXPERIMENTAL ASPECTS Example 1

A wet tobacco formulation suitable for use as a snuff type of a smokeless tobacco product is prepared as follows.

Various types of tobacco material are combined. A premix of several sheet components is made and placed in an AeroFlex Model A115 flexible screw conveyor (Vac-U-Max Company, Belleville, NJ). The flexible screw feeder unloads directly into a Fitzmill Comminutor hammer mill (Fitzpatrick, Elmhurst IL) using a concave device with holes of 3,175 mm (0.125 inches) in diameter. The sheet is then pneumatically driven to a Rotex Model 44 sieve (Rotex Corporation, Cincinnati, OH) with 2 sieves - an 18 Tyler mesh and a 60 Tyler sheet. The material that does not pass through the mesh screen 18 is returned to the milling feed hopper and the material that passes through the mesh 60 is discarded. The material that passes through the mesh 18 and is retained in the mesh 60 It is discharged by gravity into a container for later use in the process. A plurality of branch fractions (Rustica, Kurnool and Indian Sun Cured) are milled separately to the same size as the sheets using the same equipment indicated above.

An amount of each material (sheets, Indian Sun Cured Stem, Rustica Stem, Kurnool Stem) is loaded into a Scott mixer. The shaft of the mixer rotates at 73 rpm for at least 5 minutes during the mixing stage. The humidity of tobacco is 11.43% (by weight) with a pH of 5.23.

The tobacco is heated by passing heated steam at 97 ° C through the water jacket of the Scott mixer to obtain a tobacco temperature of 65 ° C before applying the first coating. The shaft speed of the mixer is 73 rpm during the heating stage.

Sodium chloride and water are placed in a Breddo Likwifer Model LORWW mixer and mixed for a minimum of 3 minutes. The coating agent is then pumped into the mixer using a Diaphragm pump that operates with ARO air at a flow rate of 4gpm. The coating is introduced into the Scott mixer using a Spraying Systems Corporation Model ^ GD SS-16 hydraulic spray nozzle. The speed of the mixer is 73 rpm and the temperature of the tobacco is controlled at 65 ° C during this stage by applying hot water or cold water to the water jacket of the mixer. The mixer operates for at least 10 minutes to ensure proper mixing of the first coating and tobacco. The humidity of tobacco at the end of this stage 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. Water vapor is injected directly into the Scott mixer through two nozzles, one mounted at each end of the vessel. Water vapor is injected to raise and maintain the temperature of the tobacco to at least 93 ° C and is maintained at this level for at least 60 minutes. The speed of the mixer is 10 rpm during this stage. The humidity of tobacco at the end of this stage is 40.23% with a pH of 5.22.

After pasteurization, the tobacco is cooled to 65 ° C before applying the second coating. The cooling stage is carried out by evaporation and convection cooling. A fan is used to introduce filtered air from the room at room temperature into the Scott mixer in order to cool the tobacco by evaporation and cold water is introduced at a temperature of 3 ° C in the water jacket to also cool the tobacco. The speed of the mixer is 10 rpm during this stage.

In the Breddo Likwifier model LORWW mixer, a second coating solution comprising water and sodium carbonate is placed and mixed for at least 3 minutes. The coating solution is introduced into the mixer by an ARO air operated diaphragm pump at a flow rate of 4 gpm. The coating solution is introduced into the Scott mixer by a Spraying Systems Corporation hydraulic spray nozzle model ^ GD SS -16. The speed of the mixer is 73 rpm and the temperature of the tobacco is controlled at 65 ° C during this stage by applying hot water or cold water to the water jacket of the mixer. The mixer operates for a minimum of 5 minutes to ensure proper mixing of the second coating solution and tobacco. The humidity of tobacco at the end of this stage is 51.62% with a pH of 8.72.

After adding the second coating solution, the constant temperature of the Scott mixer is maintained at 71 ° C for 2 hours using the water jacket. A stream of Scott is passed through the mixer

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filtered air to purge the header space. The speed of the mixer during this stage is 10 rpm. The humidity of tobacco at the end of this stage is 49.36% with a pH of 8.34.

At the end of the previous stage, the batch is dried at a constant temperature of 38 ° C for 20 hours by passing hot water at 54 ° C through the water jacket and passing filtered air through the Scott mixer. The speed of the mixer is 10 rpm during this stage. The humidity of tobacco at the end of this stage is 31.08% with a pH of 7.90.

After drying, the tobacco is cooled to 29 ° C before applying the third coating solution by running cold water at 3 ° C through the water jacket. The mixing speed is 10 rpm during this stage. The humidity of tobacco at the end of this stage is 30.85% with a pH of 7.89.

The third coating solution, which comprises a sweetener, is placed in a Breddo Likwifier model LORWW mixer and mixed for at least 3 minutes. The coating solution is then pumped into the mixer using an ARO air operated diaphragm pump at a flow rate of 4 gpm. The coating solution is introduced into the Scott mixer by a Spraying Systems Corporation hydraulic spray nozzle model ^ GD SS -16. The speed of the mixer is 73 rpm and the temperature of the tobacco is controlled at 29 ° C during this stage by passing hot or cold water through the water jacket of the mixer. The mixer operates for a minimum of 15 minutes to ensure proper mixing of the third coating solution and tobacco. The humidity of tobacco at the end of this stage is 34.23% with a pH of 7.87.

After applying the third coating, the tobacco is maintained at 29 ° C by passing cold water at 3 ° C through the water jacket. The speed of the mixer is 10 rpm during this stage. At the end of this stage the humidity of tobacco is 34.23% with a pH of 7.87.

A flavoring dressing material is placed to coat in a pressure blown vessel. The dressing is then pumped into the mixer by means of pressurized air from the blowing vessel at a flow rate of 4 gpm. The dressing is introduced into the Scott mixer through a Spraying Systems Corporation hydraulic spray nozzle model ^ GD SS-16. The speed of the mixer is 73 rpm and the temperature of the tobacco is controlled at 29 ° C during this stage by passing cold water through the water jacket of the mixer. The mixer operates for at least 15 minutes to ensure an appropriate mixture of dressing and tobacco. The humidity of tobacco at the end of this stage is 36.53% with a pH of 7.84. The resulting product is stored at 3 ° C and is ready to be placed in the bags.

Example 2

A wet tobacco formulation suitable for use as a snuff type of a smokeless tobacco product is prepared as follows.

A mixture of dried, ground tobacco material is supplied, as in Example 1. Water is added to the dried tobacco mixture. Moisture can be supplied in the form of water at room temperature or heated. Water can incorporate dispersed or dissolved ingredients. For example, a solution of sodium chloride in water can be added to the 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 in relation to the dry weight of the tobacco. For this, sufficient water is added to the tobacco mixture, so that a suspension of the tobacco mixture is formed, the moisture content being 1 part by weight of tobacco for approximately 4 to 10 parts by weight of water (for example , 1 part of tobacco for 4 to 5 parts of water).

The tobacco material suspension is heated to approximately 75 ° C and mixed at a speed of 24 rpm. The heating by convection and conduction of the tobacco mixture is then complemented by adding water vapor to the mixture. In particular, water vapor is blown in contact with the tobacco mixture using nozzles present in the mixer. The temperature of the mixture is maintained at approximately 75 ° C for approximately 30 to approximately 45 minutes while mixing at 24 rpm. The moisture content of the tobacco suspension can be controlled during steam treatment by controlling the temperature of the jacket. For example, lowering the jacket temperature during steam treatment can increase the moisture content of the tobacco mixture.

To the tobacco suspension a base, such as potassium or sodium hydroxide, is added as an aqueous solution. For example, to achieve a suspension with a pH of about 10, sufficient potassium hydroxide is added to achieve a concentration of potassium hydroxide of about 6% to about 8% by weight in relation to the dry weight of tobacco. The mixture is maintained at an elevated temperature of approximately 75 ° C for approximately 1.5 hours to 3 hours. During this time, the pH of the mixture drops to approximately 8.2 to approximately 8.3.

The tobacco suspension is cooled to room temperature and glycerol is added in the amount during cooling

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from 3 to about 8% in relation to the weight of dry tobacco. The resulting mixture is cast on a hot aluminum or stainless steel tape and dried to a moisture content of approximately 10-12% by weight by passing the tobacco material through a drying zone that is at a temperature of 85 ° C at 285 ° C.

The resulting dried tobacco material is loaded into a mixer and water and a sweetener are added in order to raise the humidity level to at least about 30% by weight. A final seasoning flavoring agent is spread on the wet tobacco. The resulting tobacco is cooled to room temperature and stored at 3 ° C, being prepared for packaging.

Example 3

A wet tobacco formulation suitable for use as a snuff smokeless tobacco product is prepared as follows.

Tobacco is treated in a manner similar to that of a tobacco reconstituted by a paper method, such as that described in U.S. Pat. us. 5,159,942 and 5,445,169 issued to Brinkley, with some modification. Tobacco (1 part) is subjected to an aqueous extraction (11 parts of water) at 75 ° C for approximately 45 minutes mixing at 24 rpm and the solids / fibers are separated by centrifugation of the weak extract (approximately 3-6% solids) . The aqueous solution used to extract tobacco contains approximately 3.5% salt (sodium chloride) and approximately 1% of a base (sodium hydroxide) by weight of tobacco. The weak extract is cooled to about 65 ° C and then neutralized by adding a base (for example, about 3.5% sodium hydroxide and about 3.5% potassium hydroxide by weight of tobacco), while mixing at a 10 rpm speed for 1.5 hours or more. During mixing, the pH of the extract changes from about 9.2 to about 8.2, after which the weak extract is concentrated to a strong extract of 30-35% solids by vacuum evaporation. After evaporation, the strong extract is mixed with approximately 6% of the glycerin humectant and then returned to the extracted fibers having previously dried to approximately 10 to 12% moisture in an oven with forced air circulation (at a temperature of approximately 85% at approximately 100 ° C).

The resulting dried tobacco material is placed in a mixer and water and a sweetener are added in order to raise the humidity level to at least about 30% by weight. A final seasoning flavoring agent is spread on the wet tobacco and stored at 3 ° C being prepared to be bagged.

An expert in the related art to which these inventions belong will imagine many modifications of other embodiments considered herein that have the benefit of the teachings presented in the preceding descriptions and the associated drawings. Therefore, it should be understood that the inventions should not be limited to the specific embodiments disclosed and that the modifications and other embodiments should be included within the scope of the appended claims. Although specific terms are used here, they are only used in a generic and descriptive sense and not for limiting purposes.

Claims (9)

5 10 fifteen twenty 25 30 35 1. A smokeless tobacco product configured to be inserted into the mouth of a product user, the tobacco product comprising a water permeable bag 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 that encapsulates an internal active load, the outer shell of the microcapsules being brittle so that the rupture of the outer shell exposes the active load to the tobacco material, and where inner active loading comprises a loading material and a tobacco-containing flavor, where the loading material comprises a plant fiber material. 2. The smokeless tobacco product of claim 1, wherein the active loading of the microcapsules comprises vanilla in complex form. 3. The smokeless tobacco product of claim 1, wherein the filler material comprises a sugar beet fiber material. 4. The smokeless tobacco product of one of claims 1 to 3, wherein the active loading of the microcapsules comprises a buffering agent. 5. The smokeless tobacco product of claim 4, wherein buffer adjusts the pH in a range of about 6 to about 10. 6. The smokeless tobacco product of one of claims 1 to 5, wherein tobacco flavoring comprises a tobacco extract or a particulate tobacco material. 7. The smokeless tobacco product of one of claims 1 to 6, wherein the active charge of the microcapsules further comprises a sweetener comprising neotame. The smokeless tobacco product of one of claims 1 to 7, wherein the active loading of the microcapsules further comprises an additive derived from an herbal or botanical source. 9. The smokeless tobacco product of one of claims 1 to 8, wherein the outer shell of the microcapsules is water soluble under conditions of at least about 45% by weight moisture relative to the total product weight of smokeless tobacco