JPH067142A - Cigaret - Google Patents

Abstract

PURPOSE: To obtain a cigarette generating a small amt. of tar as a side flow and capable of maintaining smoking in at least an FTC smoking state. CONSTITUTION: This cigarette contains an inner wrapping material enclosing a charged material or roll of a smokable substance such as a shredded tobacco filler and forming a tobacco rod and an outer wrapping material enclosing the inner wrapping material and overlapping it. The outer wrapping material contains an additive package contg. at least one kind of water-soluble salt applied in a water-soluble form. For example, a paper wrapper contg. wood pulp fibers and a calcium carbonate filler is treated with an aq. soln. contg. calcium acetate, potassium chloride and potassium acetate. The inner paper wrapping material contains flax fibers, a magnesium hydroxide filler and a calcium carbonate filler.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to cigarettes for burning tobacco, and in particular to cigarettes which, when smoking, produce a small amount of sidestream "tar" and maintain a smolder during at least FTC smoking. .

[0002]

BACKGROUND OF THE INVENTION Popular smoking articles, such as cigarettes, have a substantially cylindrical rod-shaped structure and a charge of smokable material such as shredded tobacco (eg, in the form of cut filler). , Rolls or columns, surrounded by a paper wrapper, thereby forming a so-called "tobacco rod". Cigarettes typically have cylindrical filter elements arranged in a straight line in an end-to-end relationship with a tobacco rod. The filter element typically comprises cellulose acetate tow surrounded by a plug wrap around it, and is typically attached to the tobacco rod using a surrounding tipping material. It has also become desirable to perforate the tipping material and plug wrap to dilute the mainstream smoke that is drawn in with the ambient air.

Smokers ignite one end of a cigarette to burn a tobacco rod for use. The smoker then accepts the mainstream smoke in his / her mouth by inhaling at the opposite end of the cigarette (eg the filter end).
While the smoker is not inhaling the cigarette, the cigarette remains burning and produces sidestream smoke. Sidestream smoke is smoke that enters the atmosphere directly from the ignition end of a cigarette. Sidestream smoke diffuses into the atmosphere and some individuals may negatively perceive the characteristic visibility of sidestream smoke. Thus, some cigarette smokers have shown a desire to reduce the level of visible sidestream smoke produced by cigarettes.
The relative amount of visible sidestream smoke produced by a burning cigarette is
It is related to the amount of sidestream "tar" produced by the burning cigarette. A typical cigarette about 84 mm long (eg, having a tobacco rod length of about 57 mm and a filter element length of about 27 mm) often produces about 25 to about 35 mg of sidestream "tar" per cigarette. For equipment and techniques for determining cigarette sidestream "tar," see Proctor et al., Analys.
t, 113, p. 1509 (1988).

Many cigarettes have been proposed which are reported to produce visible sidestream smoke at relatively low levels. See for example: Martin U.S. Pat. No. 4,10.
U.S. Pat. No. 4,22 to Cline.
5,636 and 4,231377; Baker, U.S. Pat. No. 4,407,308; Cline, U.S. Pat. No. 4,420,002; Owens, U.S. Pat. No. 4,450,847; U.S. Pat. No. 4,461,311 to Mathews; U.S. Pat. No. 4,561,454 to Guess; U.S. Pat. No. 4,624,268 to Baker et al .; U.S. Pat. No. 4,637 to Luke. No. 4,410; U.S. Pat. No. 4,805,664 to Hampl, Jr .; U.S. Pat. No. 4,881,557 to Martin. Kaufman.
U.S. Pat. No. 4,915,118; Perfe.
U.S. Pat. Nos. 4,924,888 and 4,998,541 to Tti et al .; U.S. Pat. No. 5,060,675 to Milford et al .; U.S. Pat. No. 5,065,777 to Owens, Jr. And European Patent Application Publication Nos. 402,059 and 458,526.

Cigarette manufacturers (i) provide good smoking satisfaction, (ii) maintain smolder during at least FTC smoking conditions, (iii) low levels of sidestream "tar" and thus visible sidestream smoke. It is desirable to provide a good-tasting cigarette that produces low levels of (4) and (iv) exhibits desired performance attributes (eg, exhibits a strong, sticky ash) during the smoking period.

[0006]

SUMMARY OF THE INVENTION Certain cigarettes of the present invention include a chargeable material or roll of smokable material encased in a surrounding wrapping material to form a so-called "tobacco rod." The smokable material is a smokable filler material that includes tobacco cut filler. The smokable material is generally a whole tobacco cut filler material, which is preferably encased and / or face-coated. The wrapping material is a paper that includes a water soluble additive package (ie, the additive package includes water soluble ingredients). The additive package is in intimate contact with the wrapping material. The amount of additive package that is in intimate contact with the wrapping material will typically range from about 5 to about 40 percent based on the final dry weight of the wrapping material containing the additive package. The additive package contains at least one water-soluble alkaline earth metal ion component. Most preferably, the additive package contains at least one water soluble alkali metal ion component. The additive package contains at least one water soluble organic anion component. Most preferably, the additive package comprises at least one water soluble inorganic anion component. Most preferably, the water-soluble alkaline earth metal ions and organic anions are the main components of the additive package. If desired, other ingredients can be incorporated into the wrapping material in addition to the additive package. For example, flavor and aroma precursors, flavoring agents, organic acids, etc. can also be added to the wrapping material.

A very suitable additive package is (i)
The optional alkali metal ion and (ii) alkaline earth metal ion are added in an equivalent ratio of (i) to (ii) of about 0 to about 1.
2, typically about 0.05 to about 1, often about 0.1.
Included in the range of about 0.7, often about 0.2 to about 0.5. A very suitable additive package is also (i
ii) an optional inorganic anion and (iv) an organic anion in an equivalence ratio of (iii) to (iv) of about 0 to about 1, typically about 0.05 to about 0.7, often about 0.1. To about 0.5, often about 0.1 to about 0.3. In addition, for additive packages, the total number of equivalents of (i) plus (ii) is (iii) plus (i
v) equal to the total number of equivalents. As used herein, the term "equivalent weight" refers to the number of moles of a component ion, the charge of that component (eg, the charge of calcium ion is 2, and
The charge of the acetate ion is 1).

"Water-soluble," when referring to the components of an additive package, means that the components of the package, when combined with an aqueous liquid, form a thermodynamically stable mixture and are soluble in the aqueous liquid. It has the capacity to form a precipitate to a significant extent when present in an aqueous liquid. Water-soluble packages can be provided by dissolving a suitable salt in the aqueous liquid and / or neutralizing the corresponding acid and base in the aqueous liquid. Particularly desirable salts are those having a solubility in water at 25 ° C of greater than about 10%. The term "water soluble" when referring to the components of an additive package as used herein means that the components at least apply, join or otherwise intimately contact them with the wrapping material. Up to the point of being subjected to a water-soluble state, it means that it is in a water-soluble form (that is, in contrast to an essentially water-insoluble precipitate). Therefore,
The water-soluble ingredients may be in an essentially water-insoluble form once they have been added to the wrapping material (ie, at least one of the ingredients of the additive package after applying the ingredients of the additive package to the wrapping material). It is possible that certain precipitates containing one may form). However, during the useful life of the wrapping material (ie, during the period up to the time when the wrapping material has been recruited, stored and stored under normal conditions and smoking the cigarette), the weight of the components of the additive package. For the most part,
While those ingredients are in intimate contact with the wrapping material,
Most preferably, it will remain in a water-soluble form (ie, as a water-soluble salt).

Certain cigarettes of the present invention include a chargeable material or roll of smokable material encased in an outer wrapping material that surrounds two layers to form a tobacco rod.
The tobacco rod has a first (ie, inner) wrapping material surrounding the smokable material and a second (ie, inner) wrapping material.
The outer) wrapping material surrounds the first wrapping material. One or both of the wrapping materials can be paper loaded with an additive package of the type described above. The smokable material is a smokable filling material that includes cut tobacco filling material. The smokable material is generally whole tobacco cut filler material, preferably the cut filler material is cased and / or face-coated.

The second or outer layer of wrapping material that surrounds the roll of smokable material is preferably a paper loaded with an additive package of the type described above. Paper is based on cellulosic base webs and inorganic filler materials (eg,
The filling material typically comprises essentially calcium carbonate particles, or a mixture of magnesium hydroxide and calcium carbonate particles). Most preferably, the second wrapping material incorporating the additive package has a moderate to relatively low inherent air permeability. The prescribed wrapping material with the additive package is about 30 CORE
Smaller than STA unit, usually about 25 CORESTA
It exhibits a porosity or air permeability of less than about 10 units, often less than about 20 CORESTA units, often less than about 15 CORESTA units, indeed about 10 CORESTA units or less. CORES
The TA unit is a measure of the linear air velocity passing through a 1 cm ² area of the wrapper at a constant pressure of 1 cm bar. CORESTA Publication ISO
/ TC 126 / SC IN 159E (1986). The second wrapping material can have a net porosity that is greater than its inherent porosity. For example, the second wrapping material can be perforated (eg, electrostatically perforated) to have a net porosity of about 50 to about 225 CORESTA units. The first or inner wrapping material surrounding the roll of smokable material is paper,
Most preferred are papers that differ in composition from the outer wrapping material.

The paper can be a variety of papers, but one of the preferred papers is a paper loaded with a magnesium-containing filler material (eg magnesium hydroxide). Such papers can include a cellulosic base web and can be essentially tobacco free. Certain papers loaded with magnesium-containing fillers contain at least one salt additive (eg, potassium malate and / or potassium chloride) that can act as a combustion chemistry, ash improver, etc. Another suitable paper is a paper containing tobacco material. A given first wrapping material containing tobacco material is sufficient to contain at least one salt additive capable of acting to maintain static burning of tobacco rods, at least when such cigarettes are smoked under FTC smoking conditions. It is preferable to have a very high level. The salt can be an essentially water-insoluble inorganic salt (eg particles of calcium carbonate), a water-soluble inorganic salt (eg potassium chloride) or a water-soluble organic salt (eg potassium citrate). Mixtures of essentially water-insoluble salts and water-soluble salts can be used. In certain circumstances, the inner wrapping material may incorporate an additive package of the type described above. Certain internal wrapping materials can contain carbonaceous material. The first wrapping material is about 20 CO
Most preferably, it exhibits an air permeability above the RESTA unit. The first wrapping material can be perforated to yield a wrapping material with even greater net porosity.

The cigarettes of the present invention preferably include filter elements each serving as a mouthpiece.
The cigarette can be air diluted (eg, by perforating the tipping material in the region overlying the filter element or by other such air dilution means). Suitable cigarettes typically use medium to low efficiency filter elements. Keith in Sc
hemeltz's The Chemistry of
Tobacco and Tobacco Smok
e, page 157 (1972). It is common to vent the filter elements into cigarettes with about 25 to about 75% air dilution. The term "air dilution," as used herein, refers to the ratio of the volume of air drawn through the air diluting means to the total volume of air and smoke drawn through the cigarette and exiting the extreme mouth end portion of the cigarette ( It is expressed as a percentage).
Selke, et al., Beitr. Zur Tabak. I
n. 4, p. 193 (1978).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cigarette of the present invention is shown in FIG. The cigarette 10 includes a cylindrical rod 15 throughout a column of smokable material 20, such as tobacco cut filler, an inner wrapping material 25 surrounding a first perimeter and a second or second wrapping material surrounding the first wrapping material. Included in the outer wrapping material 27. The inner wrapping materials surrounding the first and second perimeters are in direct contact with each other (ie, the inner surface of the outer wrapping material contacts the outer surface of the inner wrapping material). Therefore, the outer wrapping material overlaps the inner wrapping material. The rod 15 will be referred to hereafter as a "tobacco rod". The ends of the tobacco rod 15 are open to expose the smokable material. Most preferably, the outer wrapping material 27 comprises an additive package. If desired, the inner wrapping material 25 can include an additive package. The additive package will be described in more detail later in this specification. Although the additive package of the inner wrapping material 25 is optional and not particularly preferred, the inner wrapping material incorporating the additive package may be either with the outer wrapping material containing the additive package or the absence of the additive package. Can be used.

The cigarette 10 is also positioned so that the filter element 30 is adjacent one end of the tobacco rod 15 and the filter element and tobacco rod are axially aligned, preferably in contact with each other, in an end-to-end relationship. Let me include it. The filter element 30 has a generally cylindrical shape, the diameter of which is essentially equal to the diameter of the tobacco rod. The filter element has a filter material (eg, triacetin plasticized celluloacetate tow) 35 wrapped around it with a paper plug wrap 40.
It is included by enclosing in. The ends of the filter element are open to allow air and smoke to pass through. The filter element 30 is bonded to the tobacco rod 15 by tipping material 45 around both the length of the filter element and the area of the adjacent tobacco rod.
The inner surface of the tipping material 45 is secured to the outer surface of the outer plug wrap 40 and the outer surface of the tobacco rod wrapping material 25 using a suitable adhesive. An air-diluting means, such as a series of perforations 50 each penetrating the tipping material and plug wrap, provides a ventilated or air-diluted smoking article.

Referring to FIGS. 1 and 4, one type of outer wrapping material 27 has a width w (FIG. 4) equal to the circumference of the cigarette plus the wrap area of the adhesive line that ultimately occurs during the manufacture of the cigarette. Shown in). One type of second wrapping material 27 includes a series of perforations 60 that extend in a linear fashion along the length. Alternatively,
Other arrangements can be provided, for example a random perforation pattern. The size, number and relative positioning of the individual perforations 60 can be varied depending on the desired properties of the cigarette with the wrapping material incorporated therein. The individual perforations are shown enlarged in FIGS.

Referring to FIG. 2, smokable material 20 is enclosed in an inner wrapping material 25 that surrounds a first perimeter and a second outer wrapping material 27 that surrounds the perimeter of the first wrapping material. The first wrapping material 25 is applied to the side end 7
It is formed into a circular shape so that 1 and 72 are in contact with each other.
The ends 71, 72 of the wrapping material 25 may abut one another (as shown in FIG. 2), substantially abut one another, or slightly overlap one another. The second wrapping material 27 includes a wrap area 73 with a suitable adhesive therebetween to form a solid outer wrapper. Therefore, the width of the inner wrapping material is smaller than the width of the outer wrapping material. Cigarette rods having such a structure feed a paper wrapper from two bobbins on a cigarette making machine equipped with suitable equipment to position the inner wrapping material on top of the outer wrapping material,
The two so-positioned wrapping materials can be provided by passing them through the garniture region of a cigarette making machine to form a tobacco rod. An apparatus for providing cigarettes in this way is Holme
No. 5,156,169, which is hereby incorporated by reference, and which is incorporated herein by reference. Other devices for providing cigarettes in this manner will be apparent to those of ordinary skill in the art.

Referring to FIG. 3, smokable material 20 includes an inner wrapping material 25 that surrounds a first perimeter and a second outer wrapping material 27 that surrounds the perimeter of the first wrapping material.
Wrapped in. The first wrapping material 25 is shaped into a circular shape so as to form a wrap area 74 with a suitable adhesive therebetween. The second wrapping material includes a wrap area 76 with a suitable adhesive therebetween to form a solid outer wrapper. Cigarette rods having such a structure can be provided by forming cigarette rods using known techniques and then wrapping the rod thus formed with an outer wrapping material. Devices that provide such cigarettes will be apparent to those of skill in the art. Another embodiment of the cigarette of the present invention is shown in FIG. The cigarette 10 is generally similar to the cigarette described in connection with FIG. 1, but with the tobacco rod 15
Includes only one layer of circumferential wrapping material 27 that surrounds the smokable material 20. The wrapping material 27 includes an additive package, which is described in more detail later in this specification.

The smokable material used in making the tobacco rod can vary. For example, the cigarette smokable material can have the form of a filler (eg, tobacco cut filler). The term "filler" or "chopping filler" as used herein refers to a tobacco material or other smokable material having a morphology suitable for use in making cigarette rods for cigarettes. It is meant to include. Therefore, the filler can include the smokable material in a blended and ready to make cigarette. Filling materials are commonly used in the form of strands or shreds that are common in conventional cigarette manufacturing. For example, the shredded filler material may be cut to a width of about 1/20 to about 1/60 inch (1.3-0.
42 mm), preferably in the form of strands or pieces from sheet-like or "strip" material in the range of about 1/25 to about 1/35 inch (0.98 to 0.73 mm). Such strands or pieces are about 0.25 to about 3 inches (0.64 to 7.6 cm) in length.
It is common to have a range of

Examples of suitable types of tobacco materials include hot air dried (flue-cured), Burley, Maryland or Oriental tobacco, rare or specialty tobacco, and blends thereof. Tobacco material includes tobacco leaf pieces; processed tobacco material such as volume expanded or puffed tobacco; processed tobacco stem such as cut rolled or cut puffed stems; reconstituted tobacco material; or blends thereof. It can be provided in the form of. Certain reconstituted tobacco materials are listed below: Young
U.S. Pat. No. 4,987,906; Brown, et al.
U.S. Pat. No. 5,056,537 to Sohn et al .; U.S. Pat. No. 5,143,097 to Sohn et al .; Brinkl
U.S. Pat. No. 5,159,942 to ey et al .; and European Patent Application Publication No. 419,733. Certain processed tobacco materials are described in Fagg et al., US Patent No. 5,025,
812 and Fagg, 5,065,775. The given blend is Perfetti
US Pat. Nos. 4,924,888 and 4,9
98,541; and U.S. Pat. No. 4,942,888 to Montoya et al. It is preferred that the smokable material or blend of smokable materials consists essentially of tobacco filling material or simply tobacco filling material only.

The smokable material can be cased and topdressed as is conventionally done during the various stages of cigarette manufacture. Therefore, the smokable substance, in particular the tobacco filling substance, may comprise a casing and / or a top dressing ingredient. For example, blending ingredients such as flavoring agents and humectants, and other forms of tobacco (eg, tobacco extract), as is commonly practiced in the manufacture of cigarettes.
Can be applied to smokable substances. Leffin
Tobacco Flavoring such as gwell
For Smoking Products (197
See 2). Suitable flavoring agents and tobacco forms include vanillin, tobacco extracts such as tobacco essence and tobacco aroma oil, cocoa, liquorice, menthol, and the like. A flavor modifier, such as levulinic acid, is added to the smokable material (eg, about 0.01 to about 2%, usually about 0.1 to about 1%, based on the dry weight of the smokable material,
Preferably in amounts ranging from about 0.2 to about 0.6%). Such ingredients are conveniently applied to smokable materials as casing and top dressing ingredients. US Patent 4,830 to Lawson et al.,
See No. 028.

The tobacco rod has a length of about 35 to about 85 mm,
Preferably in the range of about 40 to about 70 mm and about 17 to about the circumference.
It typically has about 27 mm, preferably about 22.5 to about 25 mm. Short cigarette rods (ie, having a length of about 35 to about 50 mm) can be used, especially with smokeable blends having a relatively high packing density. The packing density of the blend of smokable materials contained within the wrapping material can be varied. Typical packing densities for cigarette rods of the present invention range from about 150 to about 300 mg / cm ³ . The packing density of the tobacco rod is about 200 to about 280.
The range of mg / cm ³ is normal.

The paper wrapping material that can be further processed into the wrapping material of the present invention can vary. Such wrapping materials include cellulosic base webs, most preferably essentially water-insoluble (eg, inorganic) fillers. Cellulosic base web is flax fiber,
It can be provided from wood pulp (eg, hardwood pulp, softwood pulp), esparto fibers, sisal fibers, or other cellulosic materials. Mixtures of two or more types of cellulosic material can be used. If desired, the cellulosic base web may also include tobacco portions or pieces (eg, tobacco stem portions), extracted tobacco portions or pieces (eg, tobacco pulp), or exposed tobacco portions or pieces. Can be included. The packing material is essentially water-insoluble, with inorganic packing materials being most preferred and may include: calcium carbonate particles, precipitated magnesium hydroxide gel, magnesium oxide particles, dolomite particles, calcium sulfate fibers, carbonic acid. Magnesium particles, agglomerated calcium carbonate particles, etc.

An example of a fill material suitable for use in paper making is US Pat. No. 5,12, Jakob et al.
No. 9,408. Suitable wrapping materials include flax fiber / calcium carbonate, wood pulp / calcium carbonate, and flax fiber / wood pulp / calcium carbonate. Certain wrapping materials, particularly those containing calcium carbonate fillers, include magnesium-containing fillers in an amount of less than about 15% by weight, often less than about 10% by weight, and often less than about 5% by weight. Certain wrapping materials, especially those incorporating calcium carbonate fillers, are essentially free of magnesium-containing fillers (e.g., wrapping materials contain about 1 magnesium-containing filler such as magnesium oxide or magnesium hydroxide). %, Preferably less than about 0.5%). It will be apparent to those skilled in the art how to make suitable paper wrapping materials.

The wrapping material that can be further processed into the wrapping material of the present invention can have a wide range of compositions and properties. A typical paper wrapping material contains about 55 cellulosic materials, based on the dry weight of the paper.
To about 100%, often about 65 to about 95%, often about 70 to about 90%, and about 0 to about 45% inorganic filler material,
Often about 5 to about 35%, often about 10 to about 30%. The basis weight of the paper can be changed. A typical dry basis weight is at least about 15 g / m ² and often at least about 20 g / m ² , while a typical dry basis weight does not exceed about 80 g / m ² and about 60 g / m ² . It often does not exceed. The porosity of the paper can be varied. A typical paper is about 300 CORES
Smaller than TA unit, often about 150 CORES
Smaller than TA unit, often about 75 COREST
It has an inherent permeability of less than A units, usually less than about 50 CORESTA units. The term "intrinsic permeability" refers to the vent porosity of the paper itself.

A specific wrapping material is Ecusta
Corp. From product numbers 419, 454, 455, 45
6, 719, 754, 854, 855 and 856, as well as Kimberly-Clark Corp.
To P-3284-29, P-3284-28, P-3
284-30 and P-3169-5B. Other examples of wrapping materials, although not preferred, are available from Ecusta Corp. Available from: Ecusta Experiment
al Paper number TOD05504, TOD054
05, TOD05273, TOD05275, TOD0
5375, TOD05759, TOD05721, TO
D05560, TOD05505, TOD05386,
TOD05390, TOD05422, TOD0538
7, TOD05551, TOD05151, TOD05
365, TOD05992, TOD05962, TOD
05963, TOD05969, TOD05943, T
OD06202, TOD06331 and TOD0623
5. Such wrapping material is preferably used as the outer wrapping material for those tobacco rods having two layers of wrapping material, but such wrapping material is also used as the inner wrapping material for those tobacco rods having two layers of wrapping material. You can also

The additive package contains at least one water-soluble alkaline earth metal ion component. Examples of such components are calcium ions, magnesium ions and mixtures of calcium and magnesium ions. Such components are typically provided as at least one water soluble salt. Salts of alkaline earth metal ion components and organic anion components are particularly suitable, but salts of alkaline earth metal ion components and inorganic anion components can also be used. Examples of salts include: magnesium acetate, calcium acetate, magnesium propionate, calcium propionate, magnesium formate, calcium formate, magnesium chloride, calcium chloride, magnesium nitrate, calcium nitrate, etc. Mixtures of two or more salts can be used.

Most preferably, the additive package contains at least one water soluble alkali metal ion component. Examples of such components are sodium ions, potassium ions, and mixtures of sodium and potassium ions. Such components are typically provided as at least one water soluble salt. A salt of an alkali metal ion component and an organic anion component, and a salt of an alkali metal ion component and an inorganic anion component can be used. Examples of salts include: potassium chloride, sodium citrate, sodium chloride, sodium phosphate, potassium nitrate, potassium lactate, potassium gluconate, sodium nitrate, potassium acetate, sodium acetate, potassium borate, sodium borate, malic acid. Potassium, potassium citrate, potassium succinate, potassium propionate,
etc. Preferably, the potassium ion component is particularly suitable. Mixtures of two or more salts can be used.

The additive package contains at least one water soluble organic anion component. Particularly desirable is the ability, when present as a calcium or magnesium salt in the treated wrapping material, to pyrolyze at the temperatures experienced during smoking cigarettes to form calcium carbonate or magnesium oxide, respectively. With those organic anions. Examples of organic anions include acetate, propionate, formate and lactate ions. Mixtures of different organic anions can be used. The additive package preferably comprises at least one water soluble inorganic anion component. Examples of inorganic anions include chloride, sulfate, nitrate, phosphate and borate ions. Mixtures of different inorganic anions can be used.

Applying the additive package to the paper,
The method of joining or otherwise bringing it into intimate contact can vary. Most preferably, the additive package is added after the paper manufacturing process (ie, the paper is post-treated with the additive package). In particular, the additive package can be applied to the manufactured paper using size pressing techniques, spraying techniques, painting techniques, gravure techniques, printing techniques, flood roller techniques, dipping techniques, and the like. Such techniques will be apparent to those of skill in the art. The additive package may be applied in a patterned manner on one or both sides of the paper, evenly applied to one or both sides of the paper, or may be incorporated essentially essentially throughout the paper, preferably in a uniform manner. be able to. It is desirable to have the components evenly distributed throughout the paper so that the additive package can impart sealant properties to the paper to provide the desired ash forming properties. The components of the additive package can be added to the paper simultaneously or individually at different processing stages. It is preferred to apply a very concentrated aqueous solution of at least one salt (eg a near saturated solution) to the paper. The ingredients of the additive package are dissolved in water and applied to the paper as an aqueous solution, then the paper is dried to bring the ingredient salts into intimate contact with the treated paper.

Alternatively, an organic acid (eg acetic acid) can be applied to the paper in water together with an alkaline earth metal ion containing salt (eg magnesium sulfate). Mixtures of salts which otherwise form a precipitate when mixed together in water can be applied individually to the paper as components of separate aqueous solutions. As an example, an aqueous solution of calcium acetate, magnesium propionate and potassium chloride can be applied to the paper; the paper can be dried; then an aqueous solution of potassium malate and potassium citrate can be applied to the paper (eg,
Can be sprayed); the paper can be dried. As another example, an aqueous solution of potassium carbonate can be applied to the paper; the paper can be dried; then an aqueous solution of calcium acetate and calcium chloride can be applied to the paper; the paper can be dried . As yet another example, an aqueous solution of calcium acetate can be applied to the paper; the paper can be dried; then an aqueous solution of potassium carbonate can be applied to the paper; the paper can be dried; An aqueous solution of calcium acetate and calcium chloride can be applied to the paper; the paper can be dried. The treated paper can be dried in a variety of ways (eg, by air drying techniques, or by conduction or convection heating techniques such as using a drum dryer or tunnel dryer).

The amount of additive package that remains in intimate contact with the treated or finished lapping material can vary. The amount of additive package in the finished paper is such that the package is at least 5%, usually at least about 10%, often at least about 15%, and often at least about 20% of the dry weight of the finished paper. However, the amount of additive package in the finished paper is typically up to about 40% of the dry weight of the finished paper, often up to about 35%, and up to about 30%. I often do it.
The level of inorganic filler material in the paper is relatively low (eg, about 10 based on the weight of the paper before treatment).
%), The additive package can be used at relatively high levels (eg, about 30% or more, based on the dry weight of the finished paper). The wrapping material treated with the additive package according to the present invention typically exhibits a significant basis weight increase over the untreated wrapping material. A given treated wrapping material has a dry basis weight of about 20 to about 50 g / m ² , and often about 20 to about 35 g / m ² . The majority by weight of the components of the additive package remain in water-soluble form (ie, as the water-soluble salt) for the effective useful life of the wrapping material, while the components are in intimate contact with the wrapping material. Is preferred.
For example, greater than about 50% by weight of the additive package, preferably greater than about 75%, and most preferably about 90%.
More than wt.% Remains in the form of water-soluble salts for the useful life of the wrapping material.

The amounts of the individual components of the additive package relative to each other can vary. A very suitable additive package is (i) an optional alkali metal ion and (i)
i) an alkaline earth metal ion having an equivalent ratio of (i) to (ii) of about 0 to about 1.2, typically about 0.05 to about 1,
Often included in the range of about 0.1 to about 0.7, often about 0.2 to about 0.5. A very suitable additive package also comprises (iii) an optional inorganic anion and (iv) an organic anion in an equivalent ratio of (iii) to (iv) of from about 0 to about 1, typically from about 0.05 to. About 0.7, often about 0.1 to about 0.5, often about 0.1 to about 0.
It is included so that it will be in the range of 3. In addition, for additive packages, the total number of equivalents of (i) plus (ii) is (i
ii) Equal to the total number of equivalents of (iv). The additive package may be free of, or essentially free of, alkali metal ion and / or inorganic anion components (ie, those components are optional), but one of these components It is highly preferred that both are present as part of the additive package. For the preferred additive package, the equivalent ratio of (i) to (ii) is less than about 0.5, most preferably less than about 0.4, and the equivalent ratio of (iii) to (iv) is about. Most preferably, it is less than 0.5 and less than about 0.4.

The various components of the additive package impart various properties to the wrapping material to which the package is applied. Certain components of the package act as ash formers and can therefore provide good quality, uniform ash. Certain ingredients regulate the burning rate of cigarettes,
Therefore, as a combustion chemical (eg, as a burn suppressant, burn retardant or burn promoter) to provide the desired puff number and cigarettes that tend not to self-extinguish.
Can act. Certain components can act as an ash conditioner or ash sealer. Most preferably, the wrapping material with the additive package in intimate contact is a cigarette wrapping material with a moderate to low inherent air permeability value. For example, such a wrapping material with an additive package incorporated therein is about 30
Smaller than CORESTA unit, usually about 25 COR
Smaller than ESTA unit, generally about 20 CORES
Smaller than TA unit, often about 15 COREST
Smaller than A unit, often about 10 CORESTA
It has an inherent air permeability that is less than that of the unit (ie, the air permeability of the treated paper itself).

Lapping materials having intimate contact with the additive package, especially lapping materials having a relatively low intrinsic permeability, have relatively high net permeability (eg, greater than about 40 CORESTA units, preferably about 50 CORESTA units). It can be processed to have a net permeability of more than. "Net permeability" means the vented porosity of a wrapping material as used in making tobacco rods. Air permeability is typically imparted to the wrapping material using microlaser, mechanical or electrostatic perforation techniques. During microlaser and electrostatic drilling operations,
It is most desirable to take care to maintain the desired color and opacification of the paper. For example, it is most desirable to minimize or avoid unsightly "browning" or singing of paper. For example, such wrapping materials, which have a small intrinsic permeability, are perforated using conventional electrostatic perforation techniques (e.g., individual perforations whose dimensions are comparable to conventional electrostatically installed perforations). A wrapping material having a net porosity of about 50 to about 225 CORESTA units, preferably about 80 to about 180 CORESTA units, and most preferably about 90 to about 120 CORESTA units can be obtained.

The size of the individual perforations that impart a high net permeability to such wrapping materials is larger than the pores in which the perforations are present in the naturally occurring paper wrapping material (ie, imparting an inherent permeability to the paper). It is normal to For aesthetic purposes, the individual perforations are preferably small enough so that they do not look bad. For example, perforations are not particularly noticeable and are almost invisible to the naked eye in most cases.

If desired, flavoring agents and / or flavors and aroma precursors (eg vanillin glucoside and / or ethyl vanillin glucoside) can also be incorporated into the paper wrapping material with the additive package incorporated therein. See Dube et al., U.S. Pat. No. 4,941,486. The same US patent is incorporated herein by reference. Other additives, such as acids, can be applied to the wrapping material in combination with the additive package or in addition to the additive package. Examples of acids include malic acid, levulinic acid, boric acid, lactic acid, and the like. A given acid can be added to the wrapping material by combining a slight excess of acid with the corresponding base during formulation of the additive package. Examples of suitable outer wrapping materials are found in Ecusta Corp. To Ec
It is available as usta Experimental Paper numbers TOD06507 and TOD06508.

Most preferably, the inner wrapping material of certain cigarette rods of certain cigarettes of the present invention is paper, preferably paper containing tobacco material. Most preferably, inorganic fillers (eg calcium carbonate) and / or water-soluble salts (eg potassium citrate) are added to the inner wrapping material in predetermined amounts. The inner wrapping material can also include carbonaceous material. The intrinsic permeability of the inner wrapping material can be varied, but is typically greater than the intrinsic permeability of the outer wrapping material, and is often much greater than the outer wrapping material. The ultimate intrinsic transmission provided by the combined wrapping material is typically slightly less than the intrinsic transmission of the outer wrapping material. However, the effect of the inner wrapping material on reducing the ultimate intrinsic permeability of the combined wrapping material is diminished when the difference in intrinsic permeability of the inner and outer wrapping materials is relatively large. The permeability of the wrapping material can be close to 1,000 CORESTA units, while the intrinsic permeability of the inner wrapping material is about 10C.
Usually over 50 ORESTA units, about 50
Often crosses the CORESTA unit,
It often exceeds about 100 CORESTA units. The inner wrapping material can be perforated (eg, electrostatically perforated) to provide the desired net permeability.

Various internal wrapping materials can be used. One wrapping material is Kimberly-
Clark Corp. As P-2540-94-A, which contains about 29% by weight of particles of active charcoal and about 71% by weight of tobacco portion derived from a coconut envelope and has a permeability of about 250 CO.
It is a paper with a RESTA unit. Another wrapping material is Kimberly-Clark Cor
p. As P-2540-94-C, which contains about 40% by weight of particles of active charcoal and about 60% by weight of tobacco portion resulting from a coconut envelope.
And a transparency of about 350 CORESTA units. Another wrapping material is Kim
very-Clark Corp. To P-2540
-94-D, which is a paper containing about 50% by weight of particles of active charcoal and about 50% by weight of tobacco portion derived from coconut husks and having a permeability of about 380 CORESTA units. is there.

Another wrapping material is Kimberly-
Clark Corp. To P-2540-136-C
Made from wood pulp, hot air dried and Burley tobacco stalks and carbonized hardwood particles and having a basis weight of about 47 g / m ² and an inherent permeability of about 14 CORESTA units. It's a par. Another wrapping material is Kimberly-Cl
ark Corp. As P-3122-4-4, which contains about 20% by weight wood pulp, about 30% by weight Turkish tobacco strip, about 30% by weight "American blend" in the form of chopped filler and about calcium carbonate particles. It is a paper made from 20% by weight, which is electrostatically perforated and has a net permeability of about 150 CORES.
Use TA unit. Another wrapping material is Kimbe
rly-Clark Corp. To P-2831-1
89-AA4, which is made from about 20% by weight of wood pulp, about 30% by weight of Turkish tobacco strip, about 30% by weight of "American blend" in cut filler form and about 20% by weight of calcium carbonate particles. The
And basis weight of about 60 g / m ² and inherent permeability of about 125 CO
It is a paper with a RESTA unit.

Another wrapping is Kimberly-Cl
ark Corp. From P-3284-11, which is made from about 25% by weight wood pulp, about 66% by weight Turkish tobacco strip and about 9% by weight calcium carbonate particles, and has a basis weight of about 60 g / m ² and It is a paper having an inherent transmittance of about 50 CORESTA units. Other wrapping materials are carbonaceous materials,
Includes wood pulp and tobacco stem portions; Porosity from about 60 to about 150 CORESTA units; Basis weight from about 45 to about 70 g / m ² ; Kimberly-Clark
Corp. To P-2540-107-A, P-254
0-107-B, P-2540-107-C and P-2
540-107-D.

Other materials are Kimberly-Cla.
rk Corp. From P-2249-115, P-2674-157, P.
-2540-155, P-2540-136-D, P-
2540-136-E, P-2540-152, P-2
540-150, P-2540-157, P-2540
-151, P-2540-156, P-2831-19
7-A10, P-2540-94-A, P-144-K
CG, P-144-RB, P-144-KCL, P-
144-SN20, P-144-BHC, P-2674
-157-A5116, P-2831-130, P-2
831-22-1, P-2831-23-3, P-19
76-25-1, P-1976-25-2, P-254
0-191, P-2540-192, P-2540-1
93, P-2540-194, P-2540-195,
P-2540-196, P-1976-25-3, P-
2831-189-B1-6606, P-3284-1
4, P-3284-14-1, P-3284-14-
2, P-3284-14-3, P-3284-196,
P-2831-189-B2-6608 and P-283
1-189-B3-6609. Another suitable inner wrap is US Pat. No. 5,131,416 to Gentry.
No. Although less preferred from a manufacturing standpoint, the inner wrap is also US Pat. No. 4,962,774 to Thomasson et al., US Pat. No. 4,987,906 to Young et al. And Brink.
It can be a reconstituted tobacco material of the type described in US Pat. No. 5,159,942 to Ley et al.

The most preferred inner wrapping material is tobacco containing paper. Tobacco-containing papers include tobacco parts (eg, tobacco stems, tobacco fines, tobacco stem pieces, tobacco dust, tobacco cut fillers, tobacco strips, tobacco leaf pieces, processed tobacco stems, tobacco scraps, extracted tobacco pulp and / or Or tobacco extract)
Made from. Suitable tobacco-containing papers contain the cellulosic portion of the tobacco material, and may also contain one or more tobacco extracts. Therefore, the preferred tobacco-containing paper incorporates tobacco as the cellulosic component. The inner wrapping material can also have cellulosic materials (eg, wood pulp), and additive water-soluble salts and additive inorganic fillers (eg, calcium carbonate and / or magnesium hydroxide) incorporated therein. It will be apparent to those skilled in the art how to make such papers.

Other highly suitable internal wrapping materials can be used. Such wrapping materials can be tobacco absent (ie, do not have any type of tobacco incorporated therein and are not tobacco containing papers). Such wrapping materials include cellulosic base webs (eg, wood pulp and / or flax fibers).
And a filler material (eg, an inorganic filler). A very suitable wrapping material comprises calcium carbonate particles and precipitated magnesium hydroxide gel. The wrapping material can also include additives such as organic acids, alkali metal salts of organic and inorganic acids, and the like. See, for example, those additives and recruitment levels described in US Pat. No. 5,141,007 to Raker et al., Col. 8, line 3 to Col. 9, line 32. Typical internal wrapping materials incorporate about 60 to about 90% by weight cellulosic material, preferably about 65 to 80% by weight, and about 10 to about 40% by weight inorganic filler material, preferably about 20 to 35% by weight. Includes dry base web. Such inner wrapping material comprises a dry base web incorporating a magnesium-containing filler material of at least about 5% based on the weight of the dry base web, but generally up to about 20% and usually up to about 15%. Is typical. Examples of magnesium-containing fillers include magnesium hydroxide, magnesium oxide, magnesium carbonate and dolomite. Such inner wrapping materials typically have a dry basis weight of from about 15 to about 45 g / m ² . Such an inner wrapping material has a porosity of about 10
About 40 CORESTA units, usually about 20 to about 30C
It typically has an ORESTA unit. A typical inner wrapping material is Ecusta Corp. From Ecusta Experimental Paper
It is available as r # TOD06509.

Yet another inner wrapping material consists essentially of potassium malate and sulfuric acid treated flax fibers and calcium carbonate, having an inherent porosity of about 7 CORESTA units and a dry weight basis weight of about 25 g / m ² . Ecu
sta Corp. From Ecusta Experim
This is a paper available as an internal paper number TOD06294. The filter element has a length of about 15 to about 40 mm, preferably about 20 to.
It typically has a range of about 35 mm and a circumference of about 17 to about 27 mm, preferably about 22 to about 25 mm. The filter element can have a wide range of filtration efficiencies. The filter element can have one segment of filter material, two or more longitudinally located segments, or other structure. Examples of filter materials include cellulose acetate tow, cellulose acetate web, non-woven polypropylene web and non-woven polyester web. The filter material can be plasticized (eg with triacetin).
Examples of filter elements are described in European Patent Application Publication No. 458,526, which publication is incorporated herein by reference.

The tipping material typically surrounds the area of the filter element and adjacent tobacco rods, such that the tipping material extends from about 3 to about 6 mm along the length of the tobacco rod. The tipping material is typically a conventional paper tipping material and is adhesively secured to the filter element and the area of the adjacent tobacco rod. The tipping material can have a variable transparency. For example, the tipping material may be essentially air impermeable, air permeable, or have areas of perforations, openings or vents, thereby providing means for providing air dilution to the cigarette,
It can be processed (eg, mechanically or by laser drilling techniques). The total surface area of the perforations and the alignment of the perforations along the circumference of the cigarette can be varied to adjust the performance characteristics of the cigarette.

For the air diluted or ventilated cigarettes of the present invention, the amount of air dilution can vary. The amount of air dilution for air diluted cigarettes is often greater than about 10%, and often greater than about 25%. The upper limit of air dilution for cigarettes is typically less than about 75%, and better less than about 65%. The cigarette of the present invention exhibits an undesirably high suction resistance. For example, the cigarette of the present invention exhibits a pressure drop of about 50 to about 200 mm of water at an air flow rate of 17.5 cc / sec. Cigarette pressure drop value is Filtrona Instr
ments and Automation Lt
d. Available from Filtrona Filter
It is typically measured using a Test Station (CTS Series). The cigarette of the present invention preferably exhibits a pressure drop of about 70 to about 180 mm water for suction resistance at an air flow rate of 17.5 cc / sec, and more preferably about 80 to about 150 mm water.

The cigarette of the present invention, when smoking,
Loctor et al., Analyst, Volume 113, 1509
The resulting sidestream "tar" is typically less than about 20 mg, and preferably less than about 10 mg, per cigarette, as measured using the equipment and techniques described on page (1988). Such cigarettes typically provide greater than about 6 puffs, and preferably greater than about 8 puffs when smoked under FTC conditions. The FTC conditions consisted of separating 35 ml puffs for a period of 2 seconds with a smolder of 58 seconds. The cigarette of the present invention is
When smoking under FTC conditions, it is common to provide less than about 15 puffs, and often less than about 12 puffs. The cigarette of the present invention is F
When smoking under TC conditions, the sidestream "tar" produced per puff cycle period of 1 minute is usually less than about 2 mg, preferably less than about 1.5 mg, and less than about 1 mg. Most preferred.

The cigarettes of this invention are capable of producing acceptable ash and fire corn upon smoking.
The preferred ash is not too dark in color, is not easily removed from the cigarette, and does not fall off. Fire corn is of acceptable length, does not stick too much, and does not crumble too easily (ie, the ash remains cohesive). However, the preferred cigarettes produce a fairly sticky ash with minimal fracture and cracking, and a fairly continuous phase of ash as provided by the wrapping material of the present invention. Preferred cigarettes tend to "fuse" into tobacco column ash,
Therefore, ash is produced which tends to be supported by the ash of the tobacco column. The cigarettes of the present invention show a tendency to maintain smolder under static combustion (ie, not puffed after ignition puff) and no tendency to self-extinguish. A much preferred cigarette does not self-extinguish and smolders at least about 3
Hold for minutes, more preferably at least about 5 minutes and often at least about 7 minutes. Preferred cigarettes have at least about one-third of the combustible length of the tobacco rod, often at least about half of the combustible length of the tobacco rod, often the total combustible length of the tobacco rod being statically combusted. It is consumed under the conditions without erasing itself.

The cigarette of the present invention burns during smoking under smoldering (ie, static combustion) conditions not specifically used. Typical cigarettes of the present invention, especially those having a circumference of about 24 to about 25 mm, exhibit a static tobacco rod linear burn rate of less than about 6 mm / min. The cigarette of the present invention has an FTC "tar" yield of about 2
It usually provides a range of from about 14 mg / cigarette, but other "tar" yields are possible. Typical FTC carbon monoxide to FTC "tar" ratios for such cigarettes are less than about 2, and sometimes about 1.
Less than 8 The cigarette of the present invention exhibits desirable sensory organ stimulating properties. Cigarettes with magnesium ions as a component of the additive package tend to lead to mainstream smoke with relatively unpleasant flavor characteristics, tend to produce white ash, and produce narrow charlines with desirable color and shape. There is a tendency. Cigarettes with calcium ions as a component of the additive package tend to produce mainstream smoke that does not exhibit a terribly powdery flavor.

The following examples are provided to further illustrate the invention and should not be construed as limiting the scope of the invention. Parts and percentages are by weight unless otherwise noted.

[0051]

EXAMPLE 1 A cigarette is manufactured substantially as shown in FIG. 1 as follows: The cigarettes each have a length of about 84 mm and a circumference of about 24.8 mm and a tobacco rod having a length of 57 mm. And a filter element having a length of 27 mm. The tobacco rod includes a smokable blend surrounded by a layer of wrapping material, which in turn surrounds the layer of wrapping material with a second or outer wrapping material. Each filter element is FIL
International, Ltd. To TSS41
Available as 98. Each filter element is attached to each tobacco rod using non-porous tipping paper. For each cigarette, the tipping paper surrounds the filter element and the tobacco rod in the area adjacent to the filter element around a length of about 4 mm. The filter element is vented to about 45% air dilution by placing a ring of mechanical perforations around the filter element's paper wrapping material, about 13 mm from the extreme mouth end of the cigarette.

The smokable blend of tobacco rods consists of tobacco material that has been packaged with a casing mixture. Tobacco materials have the form of so-called "American blends" and include hot air dried Burley and Oriental tobacco and reconstituted tobacco from papermaking processes and volume expanded hot air dried and Burley tobacco. The blend of tobacco substances is glycerin,
Case with a mixture of water and flavor. The blend is in the form of strands or pieces cut at about 25 cuts / inch (10 cuts / cm) (ie, cut filler form) and equilibrated to a moisture level of about 12.5%. Each cigarette rod is about 650 tobacco material
Contains mg.

The second or outer wrap is treated paper. The paper to be treated comprises about 12 parts wood pulp, about 1 part flax fibers and about 6 parts calcium carbonate filler before treatment. The paper contains less than 1% of a mixture of sodium citrate and potassium citrate before processing. The paper to be processed is EcustaCo
rp. Available under the product number 456 from. The paper has a measured basis weight of about 24.7 g / m ² and a measured porosity of about 22 CORESTA units. The paper is treated with an aqueous solution containing about 20 parts calcium acetate, about 3 parts potassium acetate, about 3 parts potassium chloride and about 74 parts water. The solution is applied to a paper wrap by dipping the wrap in the solution at ambient temperature to saturate the paper with the solution. Remove the paper from the solution,
Press to remove excess solution, dry in a curved surface sheet dryer at about 80 ° to about 90 ° C and conditioned for about 4 hours at ambient conditions. After conditioning the paper,
Basis weight of about 33 g / m ² and porosity of about 7.9 CORESTA
Indicates a unit. The final outer wrap is calcium carbonate,
Includes about 75 parts wood pulp and flax fiber, and about 25 parts calcium, acetate, potassium and chloride ions provided by the additive package.

The first or inner cigarette paper wrap is from Kimberly-Clark Corp. To P-2
831-130. The paper wrap comprises tobacco parts, wood pulp and calcium carbonate particles. The inner paper wrap is free of added combustion chemicals in the form of added water soluble salts. The paper is a light brown color, has a rather rough surface texture, and exhibits an inherent permeability of about 50 CORESTA units. The tobacco rod has an inner wrap surrounding the smokable blend and an outer wrap surrounding the inner wrap.
The inner and outer wraps are in direct contact with each other (ie,
The inner surface of the outer wrap contacts the outer surface of the inner wrap).

Example cigarettes are made with treated outer and inner wraps. The comparison cigarette is
Made with unprocessed Item No. 456 paper and inner wrap. Cigarettes are used by burning a tobacco rod so that the blend of smokable materials in a paper wrapper burns to produce smoke. When used, the exemplary cigarette produces very low levels of visible sidestream smoke and consumes the entire combustible length of the tobacco rod under static combustion conditions after the ignition puff (i.e., the cigarette self extinguishes). Maintain) smolder like so. Cigarettes are smoked under FTC smoking conditions, the specific example cigarette is 1
One puff yields, while the comparison cigarette yields ten puffs. Cigarettes are also tested for sidestream smoke production by an optical indicator of smoke collected in the box while smoking the cigarette under FTC smoking conditions. The sidestream absorbance value is calculated according to Milhouse et al., US Pat. No. 4,589,
Determined after 6 puffs using the method described in No. 775. The sidestream absorbance value for the comparative cigarette is 0.3.
696, while the sidestream absorbance value for the exemplary cigarette is 0.1864.

Example 2 A cigarette is provided essentially as described in Example 1, but the outer wrap is an aqueous solution containing about 30 parts calcium acetate, about 2 parts potassium acetate, about 3 parts potassium chloride and about 86 parts water. In essentially the same manner as described in Example 1. The treated outer wrap has a basis weight of about 32.8 g / m ^2.
And a porosity of about 10 CORESTA units. The final outer wrap was about 75 parts calcium carbonate, flax and wood pulp, and about 25 calcium, potassium, acetate and chloride ions provided by the calcium acetate, potassium acetate and potassium chloride additive package.
Including parts. The cigarette is smoked and tested as described in Example 1 to yield a 10.7 puff and a sidestream absorbance value of 0.1972.

Example 3 A cigarette is provided essentially as described in Example 1, but the inner wrap is a Kimberly-Clark Co.
rp. From P-3284-14, and the outer wrap is provided as follows: The paper wrapping material comprises calcium carbonate and wood pulp, from Kimberly-Clark Corp. To P
It is available as -3284-28. Approximately 25 parts of calcium acetate, about 3 parts of potassium acetate,
Treatment with an aqueous solution containing about 3 parts potassium chloride and about 86 parts water, using a technique essentially as described in Example 1. The treated outer wrap contains about 22 parts of calcium, potassium, acetate and chloride ions provided by the additive package.

Example 4 A cigarette is provided essentially as described in Example 3, but the outer wrap is about 3 parts potassium acetate, about 3 parts potassium chloride, about 34.5 parts magnesium acetate tetrahydrate and water. Treat with an aqueous solution containing about 85 parts.

EXAMPLE 5 A cigarette is provided essentially as described in Example 3, but the outer wrap is about 10 parts calcium acetate, about 20 parts magnesium acetate tetrahydrate, about 3 parts potassium acetate, about 3 parts potassium chloride. Treat with an aqueous solution containing 3 parts and about 85 parts water.

EXAMPLE 6 A cigarette is provided essentially as described in Example 3, but the outer wrap is about 12 parts calcium acetate, about 18 parts magnesium acetate tetrahydrate, about 3 parts potassium acetate, about 3 parts potassium chloride. Treat with an aqueous solution containing 3 parts and about 85 parts water.

EXAMPLE 7 A cigarette is provided essentially as described in Example 3, but the outer wrap is about 13 parts calcium acetate, about 15 parts magnesium acetate tetrahydrate, about 3 parts potassium chloride, about 3 parts potassium chloride. Treat with an aqueous solution containing 3 parts and about 85 parts water.

Example 8 A cigarette is provided essentially as described in Example 1, but the inner wrap is a Kimberly-Clark Co.
rp. From P-3284-14-3 and the external wrap is provided as follows: about 29 parts calcium acetate, about 3.5 parts potassium acetate, about 3.5 parts potassium chloride and about water. An aqueous solution containing 109 parts,
Ecusta Corp. Applies to paper wrapping material available under the product number 456 from. Aqueous solution was added to 85Quad Cylinder using Fa.
Used on the Ustel Lamonator and applied to the paper as a coating. The treated, finished paper contains approximately 19% calcium, potassium, chloride and acetate ions brought by the additive package.
including.

EXAMPLE 9 A cigarette is provided as described in Example 8, but the outer wrap is about 25.8 parts magnesium acetate tetrahydrate, about 9.4 parts calcium acetate, about 4.2 parts potassium acetate. Treat with an aqueous solution containing about 4.2 parts potassium chloride and about 102 parts water. The treated, finished paper contains about 18% calcium, magnesium, potassium, chloride and acetate ions provided by the additive package.

Example 10 A cigarette is provided essentially as described in Example 3, but the outer wrap is provided as follows: Kimbe
rly-Clark Corp. To P-3169-5
Paper wrapping materials available as B include wood pulp and very low levels of inorganic fillers (eg, less than about 5% calcium carbonate filler). The paper exhibits a measured basis weight of about 19 g / m ² and a porosity of about 28 CORESTA units. Paper
Treat with an aqueous solution containing about 10 parts calcium acetate, about 20 parts magnesium acetate tetrahydrate, about 3 parts potassium acetate, about 3 parts potassium chloride and about 85 parts water. The treated outer wrap is calcium provided by the additive package,
It contains about 20 parts of magnesium, potassium, chloride and acetate ions. The treated paper is dried and exhibits a basis weight of about 22 g / m ² and a porosity of about 14 CORESTA units.

Example 11 A cigarette is provided essentially as described in Example 3, but the outer wrap is provided as follows: Ecust
a Corp. A paper wrapping material, available as TOD 06235 from, is an aqueous solution containing about 5 parts calcium acetate, about 8 parts magnesium acetate tetrahydrate, about 2 parts potassium acetate, about 3 parts potassium chloride and about 85 parts water. Work up using techniques essentially as described in Example 1. The treated outer wrap contains about 10 parts of calcium, magnesium, potassium, acetate and chloride ions provided by the additive package.

Example 12 A cigarette is provided essentially as described in Example 9, but the inner wrap is Ecusta Corp. To TOD
Available as 06235.

Example 13 A cigarette is provided essentially as described in Example 9, but the inner wrap is provided as follows: Ecust
a Corp. A paper wrapping material, available as TOD 06235 from, is an aqueous solution containing about 5 parts calcium acetate, about 8 parts magnesium acetate tetrahydrate, about 2 parts potassium acetate, about 3 parts potassium chloride and about 74 parts water. Work up using techniques essentially as described in Example 1. The treated inner wrap contains about 10 parts calcium, magnesium, potassium, acetate and chloride ions provided by the additive package.

Example 14 Kimberly-Clark Corp. To P-3
The paper, available as 122-14, contains about 30 parts calcium chloride and the paper is treated with an aqueous solution containing 15 parts potassium carbonate and about 85 parts water using the flooded nip roller technique. Approximately 80% of the treated paper using a curved surface sheet dryer
Dry at 90 ° C to about 90 ° C. The treated paper contains a significant incorporation of calcium carbonate, and the calcium carbonate is distributed to a greater extent in the "felt side" of the paper.

Example 15 A cigarette is provided essentially as described in Example 1 substantially as shown in FIG. 1 and having only one layer of wrapping material surrounding the smokable material. The wrapping material is Ecusta Corp. From product number 45
6 available and its wrapping material is
It is treated as described in Example 1 by immersion in an aqueous solution containing about 12 parts calcium acetate, about 2 parts potassium acetate and about 86 parts water. The resulting treated paper contains about 8 calcium carbonate, wood pulp and flax fibers.
It contains 5.5 parts as well as about 14.5 parts of calcium, acetate, potassium ions provided by the additive package. Example cigarettes with treated wrapping material and comparative cigarettes (ie, similar cigarettes containing untreated Item No. 456 paper) were prepared as in Example 1.
Test for sidestream smoke production using the technique described in.
The sidestream absorbance value for the comparative cigarette is 0.671.
6, while the sidestream absorbance value for the example cigarette is 0.5243.

Example 16 A cigarette is produced substantially as shown in Figure 1 as follows: The cigarettes each have a length of about 84 mm and a circumference of about 24.8 mm, and a tobacco rod having a length of 57 mm. And a filter element having a length of 27 mm. The tobacco rod includes a smokable blend surrounded by a layer of wrapping material, which in turn surrounds the layer of wrapping material with a second or outer wrapping material. Each filter element is made of cellulose acetate tow (2.7 denier / filament /
48,000 total denier) plasticized with triacetin and surrounded by paper plug wrap. Each filter element is attached to each tobacco rod using non-porous tipping paper. For each cigarette, the tipping paper surrounds the filter element and the tobacco rod in the area adjacent to the filter element around a length of about 4 mm. The filter element is vented to about 42% air dilution by placing a ring of 1-line laser perforation around the filter element's paper wrapping material, about 13 mm from the extreme mouth end of the cigarette.

The smokable blend of tobacco rods consists of tobacco material that has been cased with a casing mixture. Tobacco materials have the form of so-called "American blends" and include hot air dried Burley and Oriental tobacco and reconstituted tobacco from papermaking processes and volume expanded hot air dried and Burley tobacco. The blend of tobacco substances is glycerin,
Case with a mixture of water and flavor. The blend is in the form of strands or pieces cut at about 25 cuts / inch (10 cuts / cm) (ie, cut filler form) and equilibrated to a moisture level of about 12.5%. Menthol is applied to the chopped filler using conventional application techniques at levels of about 0.4 to about 0.8%. Each cigarette rod contains about 650 mg of tobacco material.

The second or outer wrap is Ecusta Co
rp. From Ecusta Experimental
Treated paper available as Paper Number TOD06507. The paper to be treated had about 4 parts wood pulp and about 1 calcium carbonate filler before treatment.
Including parts. The treated paper has a basis weight of about 25 g / m ² and a porosity of about 25 CORESTA units. The paper is treated with an aqueous size solution containing about 11.6 parts calcium acetate, about 17.3 parts magnesium acetate, about 3.4 parts potassium acetate, about 3.4 parts potassium chloride and about 100 parts water. The solution is applied to a paper wrap using a size press. The paper is pressed to remove excess solution, dried and conditioned. The paper has a basis weight of 28 g / m ² and a porosity of 15 CO after conditioning.
The RESTA unit is shown. The final outer wrap contains about 84 parts calcium carbonate and wood pulp, and about 16 parts calcium, magnesium, acetate, potassium and chloride ions provided by the additive package. The additive package in intimate contact with the treated paper corresponds to about 5.2 parts calcium acetate, about 7.7 parts magnesium acetate, about 1.5 parts potassium acetate and about 1.5 parts potassium chloride. The outer wrap does not pierce electrostatically.

The first or inner cigarette paper wrap was manufactured by Ecusta Corp. From Ecusta Expe
It is available under the order of the International Paper Number TOD06509. The paper wrap contains 7 parts flax fibers, 1 part magnesium hydroxide filler and 2 parts calcium carbonate particles. The inner paper wrap contains two added water soluble salts. The salt is applied using a size press as an aqueous solution with 6% potassium chloride and 4% potassium malate. Paper has a unique transparency of about 25 CORES
It represents a TA unit and has a basis weight of about 25 g / m ² . The tobacco rod has an inner wrap surrounding the smokable blend and an outer wrap surrounding the inner wrap. The inner and outer wraps are in direct contact with each other (ie, the inner surface of the outer wrap contacts the outer surface of the inner wrap).

Cigarettes are used by burning tobacco rods so that the blend of smokable materials in a paper wrapper burns to produce smoke. When used, the exemplary cigarette produces very low levels of visible sidestream smoke and consumes the entire combustible length of the tobacco rod under static combustion conditions after the ignition puff (i.e., the cigarette self extinguishes). Maintain) smolder like so.

[0075]

The present invention relates to cigarettes that are capable of producing sidestream "tar" at relatively low levels while still providing good tobacco smoking flavor, enjoyment and satisfaction. The preferred cigarettes exhibit very low levels of visible sidestream smoke, as well as low levels of sidestream odor. The cigarette of the present invention (i) has a weight that is not too much,
(Ii) yields acceptable ash and fire corn;
ii) produces acceptable smoldering properties, and (iv) produces acceptable burn rates and puff numbers. Moreover, such cigarettes (i) burn backwards uniformly during use, (i)
i) It has a tendency not to cause visible smearing of the outer wrap immediately behind the char line during use, and (iii) produces an ash of acceptable color. The preferred cigarette burns slowly backwards during smoldering statically, leading to a relatively small amount of smokable material, while maintaining a tendency to maintain smolder.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a cigarette of the present invention.

2 is a radial cross-sectional view of the cigarette shown in FIG. 1 taken along line 1-1 in FIG.

3 is a radial cross-sectional view of the cigarette shown in FIG. 1 taken along line 1-1 in FIG.

FIG. 4 is a diagram of one type of wrapping material that can be used to provide the tobacco rod of the present invention.

FIG. 5 is a vertical sectional view of a cigarette of the present invention.

[Explanation of symbols]

 15 tobacco rod 20 smokable substance 25 first or inner wrapping material 27 second or outer wrapping material 30 filter element 35 filter substance 40 paper plug wrap 45 chipping material 50 perforation 60 perforation

 ─────────────────────────────────────────────────── --Continued Front Page (72) Inventor Mark Lindsey Laker 3850 Overview Drive, Cremons, NC, USA

Claims (20)

[Claims] 1. A rod of smokable material enclosed in a peripheral paper wrapping material in intimate contact with the additive package, a paper wrapping material comprising a cellulosic base web and an additive package comprising a water soluble component, The additive package comprises (a) 5-40 percent of the paper wrapping material on a dry basis; and (b) (i) alkali metal ions and (ii) alkaline earth metal ions in (i) vs. (ii). The equivalence ratio is 0.
The content of (iii) inorganic anion and (iv) organic anion such that the equivalent ratio of (iii) to (iv) is in the range of 0.05 to 0.7. ) A cigarette having an equivalent weight of plus (ii) equal to the equivalent weight of component (iii) plus (iv). 2. The cigarette of claim 1 wherein the paper wrapping material comprises a cellulosic base web and at least one inorganic filler material. 3. The additive package comprises 10 to 35 percent of the dry weight of the paper wrapping material.
Or 2 cigarettes. 4. The additive package comprises (i) vs. (ii).
Equivalent ratio of 0.2 to 0.5, and (ii
The cigarette according to claim 1 or 2, wherein the equivalent ratio of i) to (iv) is in the range of 0.1 to 0.3. 5. The cigarette of claim 1 or 2 wherein the smokable material is surrounded by more wrapping material and the more wrapping material is surrounded by paper wrapping material. 6. A rod of smokable material encased in a peripheral paper wrapping material in intimate contact with the additive package, a paper wrapping material comprising a cellulosic base web and an additive package comprising a water soluble component, The additive package comprises (a) 5-40 percent of the paper wrapping material on a dry basis; and (b) (i) alkali metal ions; and (ii).
An inorganic anion and (iii) an organic anion, (ii)
A cigarette comprising an equivalent ratio of (iii) to 0.05 to 0.7, wherein the equivalent of component (i) is equal to the equivalent of component (ii) plus (iii). 7. The cigarette of claim 6 wherein the paper wrapping material comprises a cellulosic base web and at least one inorganic filler material. 8. The additive package comprises (ii) vs. (ii).
The cigarette according to claim 6, wherein the equivalent ratio of i) is in the range of 0.1 to 0.3. 9. A rod of smokable material encased in a peripheral paper wrapping material in intimate contact with the additive package, a paper wrapping material comprising a cellulosic base web and an additive package comprising a water soluble component, The additive package comprises (a) 5-40 percent of the paper wrapping material on a dry basis; and (b) (i) alkali metal ions and (ii) alkaline earth metal ions, (i) vs. (ii). A cigarette having an equivalent ratio of 0.05 to 1 and containing (iii) an organic anion, wherein the equivalent of component (i) plus (ii) is equal to the equivalent of component (iii). 10. The cigarette of claim 9 wherein the paper wrapping material comprises a cellulosic base web and at least one inorganic filler material. 11. The cigarette of claim 9 wherein the additive package comprises 10 to 35 percent of the dry weight of the paper wrapping material. 12. The cigarette of claim 9 wherein the smokable material is surrounded by more wrapping material and the more wrapping material is surrounded by paper wrapping material. 13. A smokable rod comprising a smokable substance encased in first and second outer wrapping materials,
The first wrapping material surrounds the smokable material and the second wrapping material
The wrapping material surrounds and overlaps the first wrapping material; (A) the second wrapping material includes an additive package that includes a water soluble component, and the additive package includes
(A) 5-40% of the dry weight of the wrapping material; and (b) (i) optional alkali metal ions and (ii) alkaline earth metal ions in (i) vs. (i).
The equivalent ratio of i) is in the range of 0 to 1.2, and (ii)
i) an optional inorganic anion and (iv) an organic anion are included such that the equivalent ratio of (iii) to (iv) is in the range of 0 to 1, and the equivalent of component (i) plus (ii) is included in component (i).
ii) equal to the equivalent of (iv); and (B) a cigarette in which the first wrapping material comprises a magnesium-containing filler. 14. The cigarette of claim 13 wherein the second wrapping material comprises a cellulosic base web and at least one inorganic filler material. 15. The additive package comprises (i) vs. (i)
The equivalent ratio of i) is in the range of 0.1 to 0.7, and (i
The cigarette according to claim 13 or 14, wherein the equivalent ratio of ii) to (iv) is in the range of 0.1 to 0.5. 16. The first wrapping material is 2 dry basis weight.
It has 0~40g / m ^2, cigarette of claim 13 in which the second wrapping material has a dry basis weight 20 to 35 g / m ^2. 17. The cigarette according to claim 1, 6 or 13, wherein the inorganic anion is a chloride ion, a sulfate ion, a nitrate ion, a phosphate ion or a borate ion. 18. The cigarette according to claim 1, 6, 9 or 13, wherein the organic anion is an acetate ion, a propionate ion, a formate ion or a lactate ion. 19. The cigarette according to claim 1, 9 or 13, wherein the alkaline earth metal ion is calcium ion or magnesium ion. 20. The cigarette according to claim 1, 6, 9 or 13, wherein the alkali metal ion is sodium or potassium ion.