RU1829919C - Cigarette - Google Patents

Abstract

Usage: when smoking, low levels of products of incomplete combustion are provided, low amounts of by-product tar and odor are created. SUMMARY OF THE INVENTION: A combustible smokable filler material includes an agglomerated filler base of an inorganic component (e.g., calcium carbonate particles) and an organic component (e.g., alginate). The smokable filler material also includes an aerosol forming binder. Tobacco extracts and / or pieces of tobacco leaves may be included in the smokable filler material, and / or the smokable filler material may be mixed with the tobacco cut filler. Cigarettes are formed by wrapping the smoking filler material with paper wrapping material. A typical paper wrapping material has a porosity of not more than 5 units of core (CORES TA). 6 c.p. f-ly, 4 ill. (L C

Description

The invention relates to cigarettes and other smoking articles, and in particular, to cigarettes which, when smoked, emit relatively low levels of products of incomplete combustion, produce low amounts of by-product tar and odor, and maintain decay during smoking conditions of GTS.

The present invention relates to smoking articles containing tobacco in the form of a cut filler and / or in a processed form. Preferred smoking articles are in the form of a cigarette, consisting essentially of two components: a roll or dressing of smoking material, and an outer wrapping material (e.g., paper wrapper), restricting the roll of smoking material. Cigarettes according to the present invention contain smoking filling material (described in detail here below) at least as part of her smoking material.

The preferred wrapping material that surrounds the roll of smoking material, thereby forming a smoking rod is a cigarette wrapping paper with low permeability

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air. Highly preferred wraps having low air permeability or low porosity show porosity below about 5 units of core. A CORES unit is a measure of the linear velocity of air that passes through an area of 1 cm2 of wrapper at a constant pressure of 1 centibar.

One form of smoking material is a tobacco-containing smoking filler material. Such smoking material according to the present invention contains a thoroughly mixed mixture of tobacco (for example, finely chopped tobacco leaves, pieces of tobacco. Stems, grinded tobacco leaves, tobacco fine particles, tobacco dust, tobacco extract or other form of processed tobacco), and an agglomerated matrix - a filler having in close contact an organic component and an inorganic component. Preferably, the agglomerated filler matrix is formed in particulate form. The organic component is alginate or other organic material capable of forming an agglomerated filler matrix that is substantially insoluble in water under ambient conditions. The normally inorganic component is calcium carbonate. The smokable filler material contains a binder in close contact with the agglomerated filler matrix and tobacco. As such, the binder component acts to hold the tobacco particles and the agglomerated filler matrix together to form a smokable filler material. Such tobacco-containing smoking filler material may also contain some flavoring agents (e.g., cocoa, licorice, organic acids, methanol and the like) and / or aerosol-forming materials (e.g., glycerin, propylene glycol, etc.) in a tight contact with each other. The tobacco-containing smoking filler material may be formed as a sheet of water slurry formed as a sheet using paper-making methods or formed by extrusion. Such tobacco-containing smoking filler material may be used alone as the sole cigarette smoking material, or this tobacco-containing smoking filler material may be physically mixed with (i.e., mixed) or otherwise used with other smoking materials, such as tobacco filler.

Another form of smokable filler material according to the present invention contains a thoroughly mixed mixture of an agglomerated filler matrix having in close contact an organic component and an inorganic component. Preferably, the agglomerated filler matrix is formed in particulate form. The organic component is alginate or other organic material capable of forming an agglomerated inorganic filler material that is substantially insoluble in water under ambient conditions. The normally inorganic component is

0 calcium carbonate. The smokable filler material contains a binder in close contact with the agglomerated filler matrix. As such, the binder acts to

5 holding particles of the agglomerated filler matrix together to form a smokable filler material. Such a smokable filler material may also

0

contain some flavoring

components and / or aerosol forming materials in close contact with it. The smokable filler material may be formed as a water pulp sheet 5 to form a sheet by using a paper making process or by extrusion. Such a smokable filler material may be physically miscible with or otherwise used with

0 tobacco-containing smoking materials and / or tobacco cut filler.

FIG. 1 to 4 are longitudinal sectional views of smoking articles according to the present invention.

A preferred embodiment of the cigarette and smoking filler material of the present invention is shown in fi 1. Cigarette 10 comprises a generally cylindrical rod 15. The rod comprises a roller of smoking material 20 wrapped in at least one layer defining the outer

5 with wrapping material 25 (e.g. paper). Rod 15 is hereinafter referred to as a smoking rod. The ends of the smoking rod 15 are open to expose the smoking material to be burned. A smoking rod is used by igniting one end of it, and an aerosol (e.g. smoke) is generated as a result of the combustion of burning smoking material. As such, the smoking rod burns from the lit end of it towards its opposite end.

The cigarette 10 also comprises a filter element 30 located adjacent to one end of the smoking rod 15, so that the filter element and the smoking rod are aligned end to end, preferably abutting against each other. The filter element 30 has a generally cylindrical shape, and its diameter is substantially equal to the diameter of the smoking rod. The ends of the filter element are open to allow air and smoke to pass through it. The preferred filter element has at least two filter segments. As shown in FIG. 1, the first filter segment is adjacent to the smoking rod, and preferably contains carbon filter material 35 delimited by the wrapper 37, while the second filter segment is located at the end of the cigarette facing the smoker's mouth, and preferably contains filter material 40, such as the assembled non-woven polypropylene fabric or cellulose acetate tow limited by the wrapping material 45. The filter media 40 of the segment is preferably a material that creates est a pleasure, white look. Each of the filter segments is made using known filter rod manufacturing devices. The two segments are combined using known methods of combining a cork and tube, and are held together using a bounding wrap 50 so as to form a filter element.

The filter element 30 is normally connected to the smoking rod 15 by means of a mouthpiece material 55, which covers the entire length of the filter element and the adjacent region of the smoking rod. The inner surface of the mouthpiece material 55 is firmly attached to the outer surface of the closure wrapper 50 and the outer surface of the wrapper material 25 of the smoking rod using a suitable adhesive. Cigarette 10 can be made using known cigarette manufacturing methods and equipment. Optional

ventilated or air-diluted cigarettes are formed by air dilution means, such as a series of perforations 65 that pass through the mouthpiece 55, a closure 50, and a wrapper 37. Such ventilation can be accomplished with a cigarette using known methods such as laser perforation .

0 Another preferred embodiment of a cigarette and a smoking filler material according to the present invention is shown in FIG. 2. Cigarette 10 is generally similar to the cigarette described with

5 with reference to FIG. 1 except that the smoking material is in the form of a mixture that is formed in a segmented manner. At one end of the smoking rod 15 (i.e., at the end of the cigarette that is lit for 0 s) is a first segment 70 of smoking material. At the other end of the smoking rod 15 (i.e., at the end of the smoking rod adjacent to the filter element), a second

5 segment 75 of smoking material. Each segment is defined or identified in terms of its composition (i.e., the composition of each segment is different). Segments align coaxially back to back

0 to a friend in an end-to-end position, however there may be some amount of reciprocal mixing of the smoking materials in the area where the two segments meet. The length by which each smoking segment

5, the material extends along the smoking rod and may vary. However, the relative longitudinal length of the first segment with respect to the second segment is normally in the range from 1: 2 to

0 2: 1, preferably 1: 1. Such smoking rods can be manufactured using the apparatus described in U.S. Patent Nos. 4,097,222 to Weyl et al. And 4,516,585 to Pikam.

5 For preferred cigarettes of the type shown in FIG. 2, the first segment 70 normally contains tobacco in a smoking form of some type. Such a form of tobacco includes tobacco cut filler (e.g., tobacco leaves, processed tobacco materials, expanded tobacco filler, reconstituted tobacco filling materials and the like, and the like

5 mixtures), and mixtures thereof with other smoking materials. Examples of processed tobacco materials are reconstituted tobacco materials with protein removed, which are described in US Pat. Nos. 4,887,618 to Bernasek et al. And

4,941,484 to Klapp and others, which are incorporated herein by reference as a prototype. Another example of processed tobacco material is tobacco material processed according to the methods set forth in U.S. Patent Application No. 484. 587, filed February 23, 1990, which is incorporated herein by reference. Preferred cigarettes also have a second segment 75, which contains smoking material or a mixture of smoking materials of a different composition from the overall composition of the smoking materials of the first segment 70. The first segment 70 and / or the second segment 75 contain at least one k, filling filler material according to the present the present invention.

Another preferred embodiment of a cigarette according to the present invention is shown in FIG. 3. Cigarette 10 is generally similar to the cigarette described with reference to FIG. 1 and 2, except that the smoking material 20, which contains the smokable filler material of the present invention, is wrapped or contained in a treated tobacco sheet 80 or other inner wrapping material. The processed tobacco sheet 80 is normally a reconstituted tobacco sheet that is made by using a paper method, and one layer of the sheet rinses the smoking material 20. The smoking material 20 wrapped in the processed tobacco sheet 80, in turn, is wrapped with one layer of the rinsing outer wrapping material 25 (e.g. cigarette paper).

Another preferred embodiment of a cigarette according to the present invention is shown in FIG. 4. Cigarette 10 is generally similar to the cigarette described with reference to FIG. 1, 2 and 3, except that the filter element contains three segments. The segment 85 located between the first filter material 35 and the filter material 40 is preferably formed from particulate material such as activated carbon granules, magnesium silicate granules, silica gel particles and the like.

The smoking material used to make the smoking rod may vary, and most preferably is in the form of a cut filler. As used here, the term chopped filler in relation to smoking materials means including smoking materials, which have a shape corresponding to

for use in the manufacture of cigarette smoking rods. As such, the cut filler may contain smoking materials that are mixed with each other and are in the form of ready-to-produce cigarettes. Smoking materials are normally used in the form of bundles or scraps, as is common in cigarette manufacturing. For example, chopped filler can be used in the form of bunches or scraps cut from sheet-like or strip-like materials. Such strip-like materials are cut

5 (torn into pieces in widths from about 1/5 inch to 1/60 inch, preferably from 1/25 inch to about 1/35 inch. In general, the resulting beams / strands or cuts have a length in the range of 0.25 inches up to about 3 inches. The chopped filler may also have an extrusion form (for example, extruded bundles) or another physically processed form.

5Cigarette smoking rods according to

the present invention comprise a smokable filler material according to the present invention. The smokable filler material may be used in the form of a cut filler.

One preferred type of smokable filler material according to the present invention comprises an agglomerated filler matrix comprising an agglomerated matrix of an organic component and an inorganic component in intimate contact. The agglomerated filler matrix, in turn, is thoroughly mixed with

0 binder to form a smokable filler material. Such a smoking filler material most preferably contains suitable for use in the manufacture of cigarette smoking rods. As such, the cut filler may include smoking materials that are mixed together and are in a form ready for the manufacture of cigarettes. Smoking materials are normally used in the form of bundles or scraps, as is common in cigarette manufacturing. For example, chopped filler may be used in the form of

5 bundles or trimmings cut from sheet-like or strip-like materials. Such strip-like materials are cut into lengths from about 1/5 to 1/60 inch wide, preferably from 1/25 inch to about 1/35 inch. In general, the resulting bundles / strands or cuts have a length in the range of 1.025 inches to about 3 inches. The cut filler may also have an extruded shape (e.g., extruded bundles) or another physically processed shape.

The cigarette smoking rods of the present invention comprise a smokable filler material of the present invention. The smokable filler material may be used in the form of a cut filler.

One preferred type of smokable filler material according to the present invention comprises an agglomerated filler matrix, which (matrix) contains an organic component and an inorganic component that are in close contact with each other. The agglomerated filler matrix, in turn, is thoroughly mixed with a binder to form a smokable filler material. Such a smokable filler material most preferably contains at least one aerosol forming material and / or at least one flavoring component as part of the final mixture. If necessary, other components that are capable of changing the composition of the aerosol generated by the smokable filler material may be included in the smokable filler material. The agglomerated filler matrix normally contains from about 2 to 99, preferably from 5 to 20, parts by weight of the inorganic component for each part by weight of the organic component. Such a smokable filler material normally contains from about 60 to 90%, preferably from 65 to 85% (wt.) Of the agglomerated filler matrix; up to 20, preferably from 2 to 10% (weight) of the binder, up to 20% preferably 3-15% (weight) of the aerosol forming material, and sufficient amounts of flavoring agent to form the desired flavoring characteristics. Optionally, a carbonaceous material (e.g., alpha cellulose pyrolyzate) may be included in the smokable filler material, usually in amounts up to 10% and sometimes up to 30% (weight), based on the total dry weight of the smokable filler material. However, such additional carbonaceous material is not necessarily a component of the smokable filler material, and the smokable filler material may not contain such a carbonaceous material. Such a smokable filler material is combustible and can be used with (e.g., miscible) other smoking material (e.g., tobacco cut filler) to form a cigarette according to the present invention.

0 One preferred type of tobacco-containing smoking filler material according to the present invention comprises an agglomerated filler matrix having agglomerated

5 a filler matrix of an organic component and an inorganic component, which (matrix), in turn, is thoroughly mixed with some form of tobacco and a binder to form a smoking

0 filler material. Such a tobacco-containing smoking filler material preferably contains at least one aerosol forming material and / or

5 at least one flavoring component. If necessary, other components that have the ability to change the composition of the aerosol formed by the smoking filler material,

0 may be included in this smoking filler material. The agglomerated filler matrix normally contains about 2-99, preferably 5-20 parts by weight of the inorganic component per

5 each weight part of the organic component. Such tobacco-containing smoking filler material normally contains up to about 75, typically up to 50 percent (weight) tobacco of some form, up to about 80, preferably 20 to 60 percent (weight) of the agglomerated filler matrix, up to 20, preferably 2-10 % percent (wt.) binder,

5 to about 20%, preferably 3-15% (wt.) Of the aerosol forming material, and sufficient amounts of a flavoring component to obtain the desired flavoring characteristics. If necessary

0 carbonaceous material (e.g. alpha-cellulose pyrolyzate) may be included in the smokable filler material, typically in amounts of up to 10 and sometimes up to 30 percent (weight), based on total dry

5 weight of smoking filler material. However, such additional carbonaceous material is not a required component of the smokable filler material, and the smokable filler material may not contain such a carbonaceous material. Such a smokable filler material is combustible, and can be used individually as the sole smoking material of a cigarette according to the present invention.

Another preferred type of smokable filler material according to the present invention comprises an agglomerated filler matrix of an organic component and an inorganic component. The agglomerated filler matrix is thoroughly mixed with a binder and at least one aerosol forming material to form 1 smoking filler material.

Such a smokable filler material most preferably contains at least one flavoring component and some kind of tobacco as part of the final mixture. The agglomerated filler matrix contains from about 2 to 99 parts by weight of the inorganic component for each part of the organic component. Such a smokable filler material normally contains up to about 20, preferably 3-15%, by weight of a binder; more than 20, preferably 25-80%, and more preferably 30-50% (wt.) aerosol forming material; and less than 80, preferably 30-70% (wt.) filler component containing the previously described agglomerated filler matrix. In particular, the filler component may comprise all of the previously described agglomerated filler matrix, or a mixture of the previously described agglomerated filler matrix with inorganic filler material (eg, precipitated calcium carbonate) and / or organic filler material (eg tobacco). Amounts of flavoring material sufficient to form the desired flavoring characteristics of the smokable filler material may be incorporated into the smokable material. If necessary, carbonaceous material (e.g., pyrolyzate, alphacellulose) may be incorporated into the smokable material, typically in amounts of up to 10%, sometimes up to 30% (wt.), based on the total dry weight of the smoking material. However, such additional carbonaceous material is not a required component of the smoking material, and the smoking material may not contain such carbonaceous material. The smokable filler material is combustible and can be mixed with other smokable materials.

Tobacco-containing smoking fillers according to the present

The inventions have some form of tobacco incorporated therein during their manufacture. Tobacco, which is used to form such a tobacco-containing smoking filler material,

0 may take various forms, including tobacco extracts, fine tobacco particles or dust, finely chopped or crushed tobacco sheets, tobacco stems, expanded tobacco filler 5 and other forms of processed tobacco, and combinations thereof. Tobacco extracts are processed forms of tobacco and are produced by extracting tobacco material using a solvent such as water, carbon dioxide, hydrocarbon or halocarbon, as well as various other organic and inorganic solvents. Tobacco extracts may contain dried extracts

5 by spray, extracts dried by cooling (frost), heat treated extracts, such as those described in US Patent Applications No. 511158, filed April 19, 1990, and

0 452.175, filed December 18, 1989; tobacco essences such as those described in European Patent Application No. 326370; and aromatic petroleum products and extracts described in the patent

5 US Patent No. 4,506,682 to Müller and U.S. Patent Application No. 310413, filed February 13, 1989.

The smoking filler materials of the present invention contain a binder. Examples of suitable binders include hydroxypropyl cellulose, such as Aqualon co. Klucel-N, hydroxypropyl methyl cellulose, such as

5 Metocel K4M of the company Dow Chemical Co. .; hydroxyethyl cellulose, such as Aqualon co. Natrozol 250 MPC, microcrystalline cellulose, such as Avicel from methyl cellulose, such as Meto0sel A4M from Dow Chemical Co., and sodium carboxymethyl cellulose, such as CMC 7HF and CMC 7H4F G .. Particularly preferred binders include alginates such as ammonium alginate 5, sodium alginate, propylene glycol alginate and potassium alginate. Alginates, and in particular high viscosity alginates, can be used in conjunction with controlled levels of free calcium ions. Other binders include starches (e.g., corn starch), carrageenan, Hewar plant glue, carob plant glue, pectins, and Kstantan gum. Combinations or mixtures of binders (e.g., a mixture of vegetable gluhar germs and vegetable carob) can be used.

The smoking filler materials of the present invention may have at least one aerosol forming material and / or at least one flavoring component included therein. Preferred aerosol forming materials include polyols (e.g. glycerin, propylene glycol or triethylene glycol) and any other materials that emit visible aerosol, or combinations thereof. An aerosol forming material may be formed as part of a binder component (e.g., when the binder is a propylene glycol alginate). Combinations of aerosol forming materials may be used. Flavoring agents may vary and include methanol, vanillin, citric acid, malic acid, cocoa, licorice root, and the like, as well as combinations thereof. See Lefingwell et al.; Tobacco flavor for smoking articles (197).

It is sometimes required to include tinting material in smoking filler materials of the present invention. Tinting materials can affect the improvement of the integrity of the ash and the cone of fire of the cigarette, the appearance of the smokable filler material, and the aromatic characteristics of the smoke of the mainstream cigarette. The tinting material may be incorporated into the smokable filler material during the preparation of this material and / or applied to the surface of this material (e.g., as a powder) after its manufacture. The normal amount of tinting material that is used to treat a particular smoking filler material is such that the resulting material, which includes tinting material, contains from 20 parts by weight of tinting material and more than 80 parts by weight of the smoking material that is being processed. Examples of suitable tinting materials include sugars such as glucose, fructose and sucrose; and compositions such as carob powder with code 1739 from M.F. Neal Inc.

The smoking filler materials of the present invention may be surface treated with certain substances. For example, smoking filler materials may have powdered substances deposited on their surface. Exemplary materials include cocoa powder, liquorice powder, inorganic powder materials (e.g. potassium carbonate or iron oxide), tobacco dust, finely chopped tobacco leaves and the like, or mixtures thereof. Surface treatment of smoking filler

5 materials can provide these materials with improved characteristics in general and improved aromatic characteristics in particular.

The agglomerated filler matrix has an inorganic component and an organic component. For example, calcium carbonate agglomerated with alginate has an inorganic component and an organic component. Other inorganic components include calcium sulfate, magnesium oxide and magnesium carbonate. Ammonium alginate is a particularly preferred alginate. Such an agglomerated filler matrix may

0 be formed by preparing an aqueous suspension of calcium carbonate particles and hydrated alginate, and blowing out the suspension to form an agglomerated matrix of calcium carbonate (e.g., a matrix of a plurality of calcium carbonate particles spaced apart during the continuous or semi-continuous phase of the alginate). If necessary, the suspension may be volume expanded by incorporating a blowing agent therein. Examples of suitable blowing agents include linear sodium benzosulfonates, linear alkyl sulfates and linear alkyl ethoxysulfates. Preferably, an aqueous suspension of calcium carbonate and high solids alginate is spray dried to form agglomerated particles (e.g., normally spherical particles)

0 particles of calcium carbonate and alginate. Alternatively, the suspension can be dried by applying heat to form a solid mass of agglomerated calcium carbonate and alginate, and a solid mass

5 may be ground to obtain particles of the desired size. Preferably, the amount of calcium carbonate relative to the alginate is in the range from 99: 1 to 2: 1, preferably from 20: 1 to 5: 1, based on dry weight. Typically, the particles

calcium carbonate, agglomerated with alginate, are substantially insoluble in water under ambient conditions. In particular, the substantially insoluble alginate in the agglomerated filler matrix tends to limit to a high degree the tendency of the agglomerated filler matrix to eliminate its agglomerated property upon contact with water at ambient conditions. The agglomerated filler matrix is made insoluble by the interaction of the alginate with calcium ions of calcium carbonate. If necessary, the agglomerated filler matrix can be treated with a dilute acid solution to decompose part of the calcium carbonate, and the resulting calcium ions can act in the direction to make the alginate component of the agglomerated filler matrix insoluble.

An agglomerated filler matrix having an inorganic component and an organic component may contain various other organic components. For example, the organic component may be pectin, which tends to become water insoluble when reacted with calcium ions. An alternatively agglomerated filler matrix having a polysaccharide organic component can be treated with divalent ions (e.g., calcium, barium, cobalt, iron or manganese) or trivalent ions (e.g., iron or aluminum) to make polysaccharides according to essentially water insoluble. As another example, a suspension of a polysaccharide material (e.g. ethyl cellulose) and a particulate inorganic component can be formed in a non-aqueous solvent (e.g. alcohol) and dried, resulting in an agglomerated filler matrix that is substantially water insoluble.

Other inorganic materials, such as fillers, may be included in the smoking filler materials of the present invention. Such inorganic materials are often in the form of fibrous, flocculent, crystalline, amorphous or hollow particles. Examples of inorganic filler materials include calcium carbonate, particulate calcium sulfates, magnesium oxide, magnesium hydroxide, perlite, synthetic mica, vermiclite, clays, thermally stable carbon fibers,

zinc oxide, davsonite, low density calcium carbonate hollow spheres, glass spheres, glass bubbles, thermally stable carbon microspheres, calcium sulfate fibers, hollow ceramic microspheres, alumina, calcium carbonate particles, agglomerated by using a carbon component treated with low calcium carbonate density and the like.

The agglomerated filler matrix is in the form of an agglomerated matrix of an inorganic component and an organic component. Its inorganic component may contain particles of calcium carbonate, calcium sulfate, magnesium oxide, magnesium carbonate, and the like. In particular, a preferred agglomerated filler matrix is agglomerated calcium carbonate, and most preferably, agglomerated precipitated calcium carbonate. Such an agglomerated filler matrix is produced by forming an aqueous calcium carbonate slurry in the form of particles and a binder, and drying the slurry to form an agglomerated calcium carbonate matrix (i.e., a matrix of a plurality of calcium carbonate particles spaced in a continuous or semi-continuous phase of the binder ) The calcium carbonate particles that are used to form the agglomerated matrix typically show a surface area of less than about 20 m2 / g, often less than 10 m2 / g, and sometimes less than 1 m / g, as determined by the Brunauer, Emett method and Teller (BET) described in Jour. Amer. chemical general, t. 60, p. 309 (1938). Typical binders are organic materials, such as cellulose derivatives (e.g., sodium carboxymethyl cellulose), and preferably sugar-containing materials, such as molasses, high fructose corn syrup or carob in powder form under the code 1739 from M .F. Nile. Inc. Other organic materials such as pectins, alginates and other previously described organic materials may also be used.

Preferably, aqueous sludges with a high solids content (e.g., 40 to 55% by weight) of the solids contained in the sludge (calcium carbonate and binder are spray dried to form agglomerated particles (e.g. normally spherical particles) of carbonate particles

calcium and binder. Alternatively, the sludge can be dried by applying heat to obtain a solid mass of agglomerated calcium carbonate and a binder, and the solid mass can be crushed to obtain particles of the desired size. Preferably, the amount of calcium carbonate relative to the binder is in the range from 20: 1 to 2; 1, more preferably from 15: 1 to 4: 1, calculated on the dry weight. Normally inorganic particles agglomerated using saccharide and polysaccharide materials tend to lose their agglomerated property upon contact with water under ambient conditions, as a result of the tendency of saccharides and polysaccharides to dissolve in water.

The agglomerated matrix of the inorganic component and the organic component in the face of the binder material is heat treated. As such, volatile components from the organic binder material are removed and the organic binder material is calcined to form a substantially water-insoluble pure combustible carbon component. Normally, the heat treatment of the agglomerated filler matrix is carried out in a controlled atmosphere to minimize or prevent oxidation of the binder material. See, for example, U.S. Patent No. 414833, filed Sep 29, 1989, which is incorporated herein by reference. Preferably, the heat treatment provides a binder material which is in the form of a carbonaceous material and, in turn, forms a means for agglomerating the particles of the inorganic component into a matrix form. In particular, particles of agglomerated calcium carbonate and a binder can be heat treated (e.g. at temperatures up to 625 ° C and usually above 600 ° C) using a furnace, a fluidized bed, a rotary kiln, a conveyor belt kiln and the like. For example, particles of spray dried calcium carbonate particles agglomerated using molasses can be heated in a fluidized bed with a stream of nitrogen gas flowing through it, heated to a temperature sufficient to heat the particles from about 300 ° C to 625 ° C, and collected. An agglomerated matrix of inorganic component and organic binder material may

heat treated sufficiently to calcine the organic binder by subjecting the agglomerated matrix to very high

temperatures (e.g. up to 900 ° C) for a short period of time and under conditions sufficient to prevent decomposition of the inorganic component (e.g., when the inorganic component is calcium carbonate). However, if the inorganic component is calcium carbonate and the calcium carbonate undergoes partial decomposition during the calcination step, the agglomerated material may

5 to be re-carbonized by exposing this material to a carbon dioxide atmosphere, or dispersing this material in water and sparging carbon dioxide in this

0 variance.

After the calcination process, the agglomerated calcium carbonate particles normally have a calcium carbonate content of greater than 80, often greater than about

5 90% (wt.), And the carbon content is greater than 3% (wt.). The normally resulting agglomerated particles are sieved to a size of about -50 / + 325 mesh USA, and often about -80 / + 200 mesh OFA. The preferred agglomerated calcium carbonate particles that have been calcined are substantially water insoluble, spherical, free flowing, and

5 show a bulk density of from about 0.1 g / cm3 to 1.1 g / cm3, often from 0.3 to 1 g / cm3, using mercury intrusion methods. As such, calcined agglomerated calcium carbonate particles

0 form an inorganic material having a bulk density of less than 2 g / cm, and preferably less than 1 g / cm, which contains an inorganic component having a bulk density

5 more than 2.5 g / cm3. Normally, such calcined agglomerated calcium carbonate particles show a surface area of less than 30 m / g and often about 10 m / g and up to 25 m2 / g according to

0 determination by the BET method.

If necessary, the bulk density of the calcined agglomerated inorganic filler can be reduced by digesting a portion of the inorganic component with an acidifier. For example, a calcined agglomerated inorganic component may be dispersed in water, and an aqueous hydrochloric acid solution may be added to produce a resulting slurry when

stirring. The acid reacts with calcium carbonate, and does not substantially react with the carbon component. Thus, the carbon component acts to hold together the remaining calcium carbonate, while part of the calcium carbonate reacts to form carbon dioxide and water-soluble calcium chloride.

Another type of inorganic material that can be incorporated into the smokable filler materials of the present invention is a low density inorganic filler. Such a filler is produced by forming calcium salt particles, decomposing the salt anion, and contacting the particles with carbon dioxide. Examples of suitable salts include calcium proionate, calcium succinate, calcium terrate, calcium stearate, calcium salicylate, calcium palmitate, calcium oleate, calcium lactate, calcium gluconate, calcium citrate, calcium ascorbate, calcium acetylsalicylate and calcium benzoate. Other suitable salts include calcium salts of saccharides and polysaccharides. Such salts are subject to conditions sufficient to decompose its anion, which typically involves subjecting the salt to heat treatment in a carbon dioxide atmosphere.

One method for preparing an inorganic low-density filler involves heating a -80 / No. 170 mesh USA particle of calcium lactate at about 600 ° C for about 8 hours at a constant flow of carbon dioxide of 228 ml / min to form a material that lost about 65% of the weight. About 20 parts by weight of material are loaded into about 80 parts by weight of water, and the resulting slurry is contacted with a sufficient hydrochloric acid solution to lower its pH to about 6.8. The material was then removed from the water, washed in water, dried and sieved to -89 / + 170 mesh US particles. Such material is greater than about 95% (w / w) calcium carbonate and shows a bulk density of about 0.4 g / cm as determined by the mercury intrusion method.

Typically, the smokable filler materials of the present invention are produced by forming an aqueous slurry of a binder and other components of this smokable filler material, forming the slurry as a sheet, and drying the molded material to form a dry working sheet. Methods and equipment for molding

sludge as a sheet is known to those skilled in the art. Other materials such as calcium acetate, potassium carbonate, pH adjusting components, urea,

amino acids, potassium chloride and / or calcium hydroxide may be included in the slurry. Binding agents (e.g., diammonium hydrogen orthophosphate, sodium citrate, potassium hexametaphosphate or tetrasodium pyrophosphate) may be included in the slurry in quantities sufficient to control the concentration of free calcium ions in the slurry.

The molded material is dried

at ambient temperature or at elevated temperatures. Further, an aqueous solution of calcium salts can be applied to the moldable slurry. The resulting dried sheet may be cut or torn into strips and then sliced or

chopped in the form of chopped filler. The smokable filler materials of the present invention can be made by a paper making process5. In particular, water slurry of cellulosic material (e.g., softwood pulp, hardwood pulp, flax fiber and / or chopped tobacco stems), and the previously described filler is molded onto a fibrous web or wire mesh and dried to the desired level humidity. Normal, sludge, dispersion or solution

5 flavoring components, tobacco extracts, tobacco parts, aerosol forming materials and the like can be applied to the mat (for example, by spraying) and the resulting mat is dried further to form a sheet. The resulting dried sheet may be sliced or torn into strips and later chopped or ground in the form of a chopped filler. Methods and equipment

5 for making a paper type sheet are known to those skilled in the art.

The smoking filler materials of the present invention can be extruded in the desired form using appropriate extrusion methods. See, for example, the types of methods described in US Pat. No. 4,880,018 to Graves et al., Which is incorporated herein by reference as a prototype. Alternatively, the aqueous slurry of the components of the smoking material and alginate as a binder may be extruded into an aqueous solution of calcium ions (e.g., an aqueous solution of calcium chloride) to collect and

to dry. If necessary, extruded smoking filler materials can be physically processed (for example, processed using rollers, etc.) and formed into the desired shape.

The cigarette smoking rods of the present invention often contain a physical mixture of smoking materials. The mixture may contain two or more smoking filler materials according to the present invention, or a physical mixture of at least one smoking filler material according to the present invention with at least one other smoking material. Some preferred cigarettes often contain in such a mixture a sufficient amount of at least one of the smoking filler materials of the present invention, so that the smoking material in each such cigarette contains at least one percent carbon material, based on the total weight of the mixture. In particular, cigarettes having these types of smoking filler materials and having paper outer wraps of low porosity (e.g. having outer wraps that have less than 5 CORES units) tend to maintain smoldering (e.g., not self-extinguishing) when smoked in smoking conditions FTC. FTC smoking conditions consist of puffs of 35 ml for a duration of 2 s, which are produced every 60 s.

The smokable filler materials of the present invention can be mixed with tobacco cut filler. The type of tobacco may vary and may include tobacco varieties dried by smoke, Barley, Maryland and Oriental, as well as rare and specialty tobacco varieties and mixtures thereof. Such a tobacco sliced filler may be formed in the form of a tobacco leaf, expanded volume tobacco leaf, processed tobacco stems such as chopped-rolled or chopped-fumigated stems; reduced tobacco materials, such as tobacco materials with protein removed, described in US Pat. No. 4,887,618 to Bernasek et al., and 4,941,484 to Klapp and others, the phosphate-containing reduced tobacco material described in US Pat. Nos. 3,535,341 and 3420241 to Hind et al., And 3386449 to Hind, as well as U.S. Patent Application Nos. 406637, filed Sep 13, 1989, and 4,61216, filed January 5, 1990, (W) reconstituted tobacco material described in Patent U.S. Application No. 272.156. filed November 16, 1988, and in the Tobacco Eccyclopedia, Wodges Edition, p. 389

TJI (1984); reconstituted tobacco materials described in US Pat. Nos. 4,16332, filed Sep. 29, 1989; and 4,148,331, filed Sep. 29, 1989; or mixtures of these tobacco materials.

0 Smoking materials can be moistened or enriched from above as is normally produced at various stages of cigarette production. For example, flavoring components may be applied to

5, smoking material, as is usually done when a cigarette cut filler is processed. Suitable flavoring components include vanillin, cocoa, malt

0 root, menthol, and the like. Aroma modifying components may also be applied to the smoking material. An aroma modifying component in the form of levulinic acid can be applied to

5 smoking filler material (for example, in amounts in the range of 0.01-2%, normally 0.1-1%, preferably 0.2-0.6%, based on the dry weight of the smoking material). Another flavor modifying component, in the form of potassium carbonate, can be applied to the smoking material (e.g., in amounts of less than 5%, normally 2-3%, based on the dry weight of the smoking material). Aerosol-forming materials and hemactants, such as glycerin and propylene glycol, can be applied to the smoking material. Such components are usually applied to the smoking material as moisturizing and surface

0 enriching components.

A preferred wrapping material that holds the smoking rod is a cigarette wrapping material having a low air permeability value. Such wrapping material typically has an air permeability of less than 5 units of CORES, often less than 3 units of CORES, and often less than 1 unit

0 CORES. Typical wrapping materials are cigarette (tissue) paper wrapping materials. Corresponding wrapping materials are cigarette wrapping materials manufactured under the indices DD 71-1, DD 71-6, MTR-1021, P-2831-60-2, P-2831-60-3, P-2831-60 -4, P-2831-60-5, P-2674-110, P-2831-60-1 and DD 100-2 manufactured by Kimberly Clark Bldg. Matching Wrapping Materials

low porosity cigarette papers are commercially available, and may have different levels of flammable chemicals, diluents, etc., included therein. Preferred, in particular, are cigarette wrapping papers which contain a quantity of a polymer film forming agent sufficient to produce paper having the desired low air permeability. For example, a sufficient amount of a solution of a polymer film forming agent (for example, carboxymethyl cellulose or ethyl cellulose) can be applied to the wrapping paper. The boron of the polymer film forming agent will be apparent to those skilled in the art.

The optional polymer film forming agent can be applied to the paper wrapping material during paper making, or applied as a print or ink after the paper is completed. Typically, a film-forming substance is applied to the paper as a diluted solution (e.g., at a concentration of about 0.2-5% (w / w) relative to the solvent) to facilitate processing. The amount of film-forming material applied to the paper wrapping material depends on factors such as the permeability of the paper and the film-forming ability of the film-forming material. Typically, the amount of film-forming substances that are used is in the range of about 1-10% based on the dry weight of the paper. For example, a 5 percent (w / w) solution of ethyl cellulose in ethanol or sodium carboxymethyl cellulose in water can be applied to cigarette paper using a size press, and the paper can then be dried to obtain a non-wettable, moisture-resistant wrapping paper having a porosity of less than 1 CORESTA unit preferably less than 0.5 units of CORESTA.

Smoking rods and resulting cigarettes can be made in any known configuration using known methods of a cigarette making apparatus. Smoking rods often contain smoking material wrapped in a single layer of wrapping material, although a double layer of two types of wrapping materials can be used. See, for example, U.S. Patent No. 528,302, filed May 24, 1990, which is incorporated herein by reference.

Cigarettes having smoking rods twice wrapped in two layers of wrapping material preferably contain one of the previously described paper wrappers with low porosity as outer wrappers. The inner wrapper may vary, but is typically a tobacco holding wrapper. Exemplary inner wraps are paper wrapping materials which contain about 3 parts of stem tobacco and 1 part of wood pulp and are manufactured by Kimberly-Clark Corp. as R-2249-115 and R-2831-23-3. Other suitable internal wrapping materials include tobacco parts and carbon materials, and are available from Kimberly-Clark Bldg. as P-2540-94-A, P-2540-94-C and P-2540-94-D. The internal wrapping materials may contain flammable chemicals (e.g. potassium citrate, potassium acetate or potassium succinate), and / or act as a substance for applying flavoring components (e.g. menthol or vanillin) or as precursors to flavoring components (e.g. vanillin glucoside or glucose ethylvaniline zide).

Typically, the smoking rod has a length that is in the range of 30-70 mm, preferably 35-60 mm, and a circumference of 17-27 mm, preferably 22-25 mm. Short smoking rods (i.e. having a length of 30-50 mm) can also be used, preferably when the smoking materials that are used have a relatively high packing density.

The density of the packing of the smoking material contained in the outer wrapper may vary. Typical densities of the packing, smoking rods of cigarettes of the present invention are in the range of about 150-400 mg / cm3. Normally, the packing densities of such smoking rods are in the range of 200-380 mg / cm3, often 250-360 mg / cm3, in particular when relatively short (i.e., less than 50 mm long) smoking rods are used.

The cigarettes of the present invention preferably comprise a filter element, and most preferably comprise a filter element having more than one segment. For example, a preferred filter element has two or more filter segments. Typically segments of preferred filter elements each have

a length which is in the range of about 10-30 mm and a circumference of about 17-27 mm, preferably 22-25 mm. The closure wrapper that surrounds the filter material of each filter segment is typically a conventional paper closure wrapper, which may be either breathable or substantially airtight.

Preferred filter materials of one of the filter segments contain carbon materials (for example, activated carbon particles, charcoal particles or carbon paper). An example of a specifically preferred filter material is represented by a tobacco / carbon copy selection sold by Kimberly-Clark Cor .. as P-144-BAC. Such filter media reduce the levels of certain gas phase components in the mainstream smoke that is passed into the smoker's mouth. As such, the preferred filter materials of this segment act to lower the levels of any smoke components that may cause unpleasant taste or other undesirable properties in the mainstream smoke.

Preferred filter materials of the other of the filter segments normally contain fibrous materials. An example of suitable filter media is a wrinkled non-woven polypropylene fabric. A particularly preferred sheet-shaped non-woven polypropylene fabric is PP-100-F manufactured by Kimberly-Clark Corp. Another example of a suitable filter medium is cellulose acetate. In particular, preferred products from cellulose acetate tow contain 8 denier per thread / 40,000 denier total, and 8 denier per thread / 15,000 denier total. 8 denier per thread / 25,000 denier in total, and 8 denier per thread / 30,000 denier in total. Plasticizers, such as triacetin, propylene glycol or triethyl citrate, may be combined with filter materials.

Another filter segment may have filter material in the form of a wrinkled web of nonwoven thermoplastic fibers (i.e. hydrophobic) in close contact with a water-soluble tobacco extract so as to form a filter material containing the extract. A highly preferred fabric is a non-woven polypropylene fiber fabric manufactured by the company.

Kimberly-Clark Bldg. as 200 .... Examples of filter segments and filter elements are described in US patent applications No. 414835, filed September 29, 1989

G. and 518597, filed May 3, 1990. Such segments can create increased aromatic properties in the smoke of the main stream that passes through them.

Another filter segment may

0 contain tobacco paper material as filter material. For example, the filter media may be in the form of a wrinkled tobacco paper web manufactured by Kimberly 5 Clark Bldg. like R-144-B.

Filter element segments suitable for use in this invention can be manufactured using known manufacturing methods.

0 cigarette filters. Filter elements can be made from cellulose acetate tow using known methods. The filter elements can be made of carbon paper, tobacco paper and sheet-like non-woven polypropylene fabric using the filter manufacturing methods described in U.S. Patent 4,807,809 (to Pryor et al.), Which is incorporated herein by reference.

0 Alternatively, charcoal or activated carbon particles can be included in the filter element using the so-called three-filter configuration by placing particles between two

5 segments of appropriate filter media.

Filter elements may have low, medium or high transmittance. Preferred filter elements have a minimum aerosol retention efficiency of the main stream (i.e., smoke) while maintaining the desired smoking properties of the cigarette. This minimum smoke retention efficiency5 is achieved with low efficiency filter elements. Low efficiency filter elements have a minimum ability to retain microparticles of mainstream smoke. See Kate-in-Schemelz, Chemistry of Tobacco and Tobacco Smoke, p. 157 (1972). In general, low-efficiency filtering elements form the retention efficiency of microparticles of primary smoke

5 flows less than 40% (wt.).

The mouthpiece (coccygeal) material is surrounded by a filter element and an adjacent region of the smoking rod, so that the mouthpiece material extends 3-6 mm in length along the smoking rod. A typical mouthpiece material is ordinary mouthpiece paper. Mouthpieces of different porosities may be used. For example, the mouthpiece material may be substantially airtight, breathable, or machined (e.g., by mechanical or laser perforation methods) so as to have an area of perforations, passage openings, thereby providing an air dilution means for the cigarette. The total surface area of the perforations and the placement of perforations along the periphery of the cigarette may be varied to control the quality of the cigarettes.

For heated with diluted or ventilated air according to the present invention, the amount of air dilution can vary. Typically, the amount of air dilution for an air-diluted cigarette is greater than 25% and often greater than 40%. The upper air dilution limit for a cigarette is typically less than about 75%, more often, less than about 65%. As used herein, the term “air dilution” means the ratio (expressed as a percentage) of the volume of air drawn through the air dilution means to the total volume of air and aerosol (i.e. smoke) drawn in through the cigarette and entering the outermost mouth portion of the cigarette. See Selke et al., BeilzZurTabak In, v. 4, p. 193 (1978).

The cigarettes of the present invention, when smoked, form an aromatic aerosol in the main stream. The aerosol of the main stream of such cigarettes can emit low levels of products of incomplete combustion, as well as low levels of gas phase components. Cigarettes burn at an acceptable rate and maintain static decay, at least when smoked under FTC smoking conditions. Cigarettes, when smoked, have a cone of ash and fire, which is not too cohesive and therefore not too long. However, cigarettes also form a cone of ash and fire, which shows good integrity.

Cigarettes according to the present invention generally emit less than about 20 mg, preferably less than about 10 mg tar in the sidestream of a cigarette when smoking, as determined by the methods and apparatus described by Proctor et al .; Analyst, t. 113, p. 1509 (1988). Such cigarettes normally provide more than about 5 puffs, preferably more than about 6 puffs per cigarette during smoking under FTC conditions. Normally, cigarettes of the present invention provide less than 20 puffs, and often less than 15 puffs, during smoking under FTC conditions.

The following are examples to further illustrate the invention, which, however, should not be construed as limiting its scope. Unless otherwise specified, all parts and

0 percent are given in weight ratios.

PRI me R 1. A. Preparation of tobacco-containing smoking filler material.

The filler was made as follows.

500 parts of tap water and 5 parts of high viscosity ammonium alginate produced as

0 Amoloid HV Cell division of Merck & Co. Inc. The resulting mixture was mixed at ambient temperature in order to disperse the alginate in water and hydrate the alginate. Then 95

5 parts of precipitated calcium carbonate, sold as USP Light by Pfizer Inc., was added to the water / alyinate mixture. The resulting slurry was mixed at moderate speed for 10 minutes until

0 obtain a grease slurry.

The sludge was spray dried using a SI Anhydro Type Lab spray dryer having an air inlet nozzle with an inlet temperature

5 at about 290 ° C and an output temperature of about 220 ° F. The spray dryer is equipped with a Masterflex pump system using a model 7016-20 head manufactured by the Kol-Pzrmer tool ..

0 The nozzle air pressure was 4 psi, and the fluid flow rate was ensured by setting the pump speed control to 2. The resulting spray dried particles were generally spherical in shape. Particles were sieved to a particle size of -80 / + 325 US mesh.

Spray dried particles are free flowing, substantially insoluble in water when ambient

They are resistant to wetting and remain in an agglomerated state when they come in contact with water under ambient conditions. Each particle constitutes an agglomerated matrix of many

5 precipitated calcium carbonate particles dispersed in alginate.

Smoking material was made as follows:

A high shear mixer containing 225 parts of tap water and set to a low speed was charged with 5 parts of high viscosity ammonium alginate sold under the name Amoloid N. by Merck & Co. Inc., Kelko Division. The resulting mixture was stirred at ambient temperature to disperse the alginate in water and hydrate the alginate. Then, 20 parts of glycerol and 25 parts of tap water were charged into the water / alginate mixture. Then 17.2 parts of the previously described agglomerated calcium carbonate were charged into the mixture. The resulting slurry was mixed until a consistent slurry was obtained.

The slurry was poured 0.025 inches thick over high density plastic sheet and dried in air. The resulting sheet was light brown in color and flexible. The sheet was cut into 32 cuts per inch using a paper shredder.

The chopped pieces of the leaf were pulverized with 8.5 parts of finely chopped leaves of Pencilvan cigar tobacco.

B. Making a cigarette

Cigarettes, essentially as shown in FIG. 3 were manufactured as follows:

Each cigarette had a length of about 84 mm and a circumference of about 24.8 mm and contained a smoking rod of about 57 mm long, a first filter segment of about 15 mm long and a second filter segment of about 12 mm long. The first and second filter segments form a filter element. Each filter segment was attached to each smoking rod using non-porous mouthpiece paper. In each cigarette, cigarette paper covered the filter element and about 4 mm (length) of the smoking rod in the area adjacent to the filter element. The filter elements were ventilated to about 60% air dilution by forming a ring of perforations in the mouthpiece paper and a capping wrapper on the filter element, surrounding the cigarette about 12 mm from the edge of the mouthpiece end.

The smoking rod contained the previously described tobacco-containing smoking material in the form of a cut filler.

The first filter segment was formed by arranging an 11.75-inch wide tobacco sheet and carbon paper sold as (P-144-BAC) by Kimberly-Clark Corp. using a filter forming apparatus

the rod described in Example 1 of US Pat. No. 4,807,809 to Pryor et al. A capping wrapper for the filter segment is produced under the index number 5831

by Ekusta Corp. The first filter segment is located adjacent to the smoking rod.

A second filter segment is formed by arranging a web of width

0 11.75 inches of nonwoven polypropylene fabric sold as PP-100-F by Kimberly-Clark Bldg. Using the filter rod forming apparatus described in Example 1 of the patent

5 USA No. 4807809 to Pryor et al. A capping wrap for the filter segment is available under the index Nfe 5831 from the company Ekusta Corp. A second filter segment is installed adjacent to the first filter segment from the end of the cigarette mouth end.

A cigarette outer paper wrapper shows an air permeability of about 0 units of CORES. A 5 ha cigarette boom is produced as R-2831-60-1 by Kimberly-Clark Bldg.

The inner wrapper of the smoking rod is tobacco-containing paper, manufactured as P-2831-23-3 by Kim0 Burley-Clark Corp.

Smoking cigarette rods are made by known methods. In particular, the smoking material is wrapped in a single layer of paper wrapper. The weight of the smoking material in each cigarette rod is about 1 g.

Cigarettes are used by burning the smoking rod, so that the smoking material in the paper wrapper is burned with smoke. When used, such cigarettes emit very low levels of visible sidestream smoke and a substantially odorless side stream. Cigarettes are not self-extinguishing during the smoldering period under FTC smoking conditions.

PRI me R 2. Particles of calcium carbonate, agglomerated with alginate, were made as follows;

750 ml of tap water and then 20 g of glycerol were charged into the mixer. During slow stirring, about 10 g of the ammonium alginate described in Example 1 was introduced at a slow speed so as to disperse the alginate in water.

5 The resulting mixture was transferred to a one-liter vessel, sealed and slowly rolled overnight to hydrate the alginate.

Sludge 250 g of precipitated calcium carbonate sold under the index No. 2A by Pfizer Inc., was prepared in 250 g of tap water and then introduced into 200 g of a mixture of water (glycerol) alginate. The resulting slurry was slowly mixed until a smooth structure slurry was obtained.

The slurry was poured onto a sheet of high density polyethylene, forming a layer of about 0.04 inches thick, and dried in air to obtain pieces of a dried sheet measuring about 6 x 6 inches. The resulting dried sheet was then pulverized by hand to fine particles and sieved through -50 US mesh.

Particles of calcined agglomerated calcium carbonate were prepared as follows:

A low shear mixer was charged with 832 parts of tap water at ambient temperature, 757 parts of precipitated particulate calcium carbonate, available as Albacar 5970 from Pfizer Inc., and 267 parts of molasses. Calcium carbonate had a rosette-like structure and an average particle size (i.e. diameter) of about 2 microns. Molasses was a type of refined syrup manufactured by Savannah Sugar Co., and had a solids / water content of about 3.7: 1. The resulting mixture was mixed for 5 to 10 minutes to form a slurry having a solids content of 52% and a viscosity of 1200 c / s when measured with a Brookfield LVT viscometer using a cylindrical LV spindle No. 4.

The sludge was spray dried by continuously pumping the sludge at a rate of 6 psi at a feed pressure of 475-500 psi on a spray dryer. The spray dryer was an industrial-type Boven type, equipped with an SD-046 nozzle and operated in industrial mode. The inlet temperature was 470 ° F. and the output temperature was 260 ° F. The resulting spray dried particles were generally spherical and had a moisture content of less than 2%. Particles were sieved to a particle size of -70 / + 200 mesh USA.

Spray dried particles were placed on a 12 x 36 inch steel tray with a 0.5 inch thickness layer. The tray is then passed through an oven with a conveyor belt at a speed of 8-12 inches / min, and is heated in a nitrogen atmosphere to 600 ° C for 10 minutes, and then at 400 ° C for 20 minutes. The oven is maintained at 720 ° C and the tray is exposed to maximum temperature.

air at about 670 ° C during this time. The heated particles are removed from the furnace to a cooling zone, in which they are under nitrogen for an hour and cooled to room temperature.

The calcined particles thus collected are black, spherical in shape, freely flowing and resistant to wetting. Particles contain 93% carbonate

calcium, and show a bulk density of about 0.5 g / cm3. The particles, each, are an agglomerated matrix of a plurality of precipitated calcium carbonate particles dispersed in a carbon material.

5 Tobacco-containing smoking filler material was made as follows:

225 ml of tap water was charged into the mixer with a high shear force

0 g of water, and 5 g of the ammonium alginate described in Example 1 was dispersed in water. The resulting mixture was slowly stirred at ambient temperature for 15 minutes until hydration of the alginate was complete. Then 20 g of glycerol was introduced into the mixture, followed by the addition of 25 ml of tap water. About 16.7 g of the American tobacco cut filler mixture was added to the mixture, which was pulverized. Then, 25 ml of tap water was added to the mixture. The resulting mixture was mixed until a smooth slurry was obtained. A mixture of 13.8 g of calcined agglomerated calcium carbonate and 13.8 g of calcium carbonate agglomerated with ammonium alginate was added to the sludge. The resulting slurry was mixed until a smooth slurry structure was obtained. Resulting sludge

0 was poured onto a high density polyethylene sheet with a thickness of 0.025 inches and dried in air.

PRI me R 3. A. Preparation of an agglomerated filler matrix.

5 to 500 parts of tap water at ambient temperature and contained in a mixer with a high shear force loaded 5 parts of ammonium alginate, produced under the name

0 Amoloid HV. The mixture was stirred until hydration of the alginate was complete. The mixture was then transferred to an egg-type mixer. Then 94.5 parts of precipitated calcium carbonate, as

5 is described in example 1, was loaded into the mixture. Stirring was continued until a mixture of uniform consistency was obtained. Then, 0.5 parts of sodium dodecyl sulfate, manufactured by Aldrich Chemical Co., was charged into the mixture. Stirring

lasted about 15 minutes, and by this time the mixture foamed.

The slurry was poured with a layer of 0.05 inches thick over a sheet of high density polyethylene and dried in air. The resulting sheet was white and very fragile. It was ground and sieved to obtain a particle fraction of -30 / + 100 mesh USA. This material did not lose its structure when immersed in water. The material had a bulk density when measured with a graduated cylinder of about 0.26 g / cm. The bulk density of the initial calcium carbonate as measured by the same method was about 0.46 g / cm3.

B. Production of smoking filler material.

In 200 parts of tap water at ambient temperature contained in a mixer with a high shear force, 3.33 parts of Ammonoid N. ammonium alginate were charged, then 4.5 parts of glycerol. The mixture was stirred for 15 minutes until the components were completely hydrated. The mixture was then transferred to an egg-type mixer for mixing and mixed. Separately, 60 parts of the above agglomerated calcium carbonate were mixed with 400 parts of tap water, and the resulting slurry was added to the mixture. The mixture was mixed gently until an even consistency was obtained. The mixture was then poured with a layer of 0.05 inches thick over a sheet of high density polyethylene. The resulting sheet was white and flexible. The resulting sheet density was 0.39 g / cm. The density of a comparable sheet made using the initial non-agglomerated precipitated calcium carbonate was 0.96 g / cm. This smokable filler material was cut into strips about 1/32 inch wide to form a smoked cut filler.

PRI me R 4. Agglomerated matrix-filler was made as follows.

In 20 parts of tap water at ambient temperature and contained in a high shear mixer, 5 parts of LM Sugarles pectin, type LM-20 ASZ, manufactured by Hercules Chemicals, were loaded. The mixture was stirred until the pectin was completely hydrated. The mixture was then transferred to an egg-type mixer. Separately, 670 parts of precipitated calcium carbonate, as described in Example 1, were introduced into 200 parts of tap water. 0.3 parts of polyoxyethylene sorbitan monooleate was added thereto,

manufactured under the name Tween-80 by Sigma Chemical Co. and loaded into the mixture. This slurry was then charged into the pectin mixture and mixed for 15

min. until the mixture foams.

The foamed slurry was poured with a layer of 0.05 inch thickness on a high density polyethylene sheet and dried in air. After drying, the sheet was sprayed with a 5% aqueous solution of calcium chloride, so that the resulting sheet now contained about 1 part of calcium chloride. The resulting sheet was white and very fragile. It was crushed and sieved for

5 to obtain a particle fraction of -30 / + 100 mesh USA. The material had a bulk density when measured with a graduated cylinder of about 0.28 g / cm. The bulk density of the initial calcium carbonate as measured by the same method was 0.46 g / cm3.

The resulting agglomerated filler matrix was used to make the smokable filler material 5, essentially in the same manner as described in Example 1.

Claims (7)

1. A cigarette containing a wrapped smoking filler material including tobacco, characterized in that, in order to improve the taste of the cigarette when smoking, the smoking filler material contains a mixture of tobacco with agglomeration of a base 5 filler comprising inorganic and organic components, and a binder. 2. A cigarette according to claim 1, characterized in that it contains ammonium alginate as a binder. 3.Cigarette according to paragraphs. 1 and 2, exc., So that tobacco is included as an extract. 4. A cigarette according to claim 3, characterized in that the smoking material contains 5 aerosol forming substance. 5. A cigarette according to claim 1, characterized in that the wrapper is made of paper with a porosity of not more than 5 Korest units. 6.Cigarette according to paragraphs. 1-5, except for the fact that the agglomerated filler base comprises a calcium carbonate component and an alginate component. 7. A cigarette according to claim 1, characterized in that the agglomerated base-filler 5 contains 10-99 mah. calcium carbonate for each m.h. organic component. Priority on points: 09.29.89 1,3,4,5; 08/15/2010 2.6.7. / J5 / 10 30 55 65 / // J SHZ 40 25 Fig. / / ,fifteen / 10 25 T / Gt 70 fae 2 7535 7 50 / 10  . v /. 25 .3 20 /Yu / 70 / f. x, x,. 25 80 0vЈ 4 75 55 35 85 I 35 37 fifty 45 , 3 T / Gt 535 7 50 45 55 65/30 Ljl J) 7  w 40 I TT 35 37 50 45 T thirty heg1 to ° oo- ooc 5 35 85 45