RU2356458C2 - Reconstituted leaf tobacco and its production method (versions) - Google Patents

Abstract

FIELD: tobacco products.

SUBSTANCE: methods proposed refer to reconstituted leaf tobacco production, as well as to production of modified reconstituted leaf tobacco. The methods are designed for cigarette manufacturing. One of the version refers to method of reconstituted leaf tobacco with binder production. The method implies production of suspension from tobacco and binder in given correlation. Preliminarily produced leaf of reconstituted tobacco, containing given quantity of wood paste, is enveloped with the suspension obtained. The suspension is complemented with a flavouring agent. The reconstituted leaf tobacco is supplemented with wetting reagent. A leaf of reconstituted tobacco is sliced into stripes. Several such stripes are placed into cigarette so that the stripes are adjacent to tobacco core. The other reconstituted leaf tobacco production version implies manufacturing of suspension from binder, wetting reagent, tobacco and flavouring agent, following defined proportions. The suspension is produced by sequential dispersion of tobacco, binder, wetting reagent and flavouring agent in water solvent. Then leaf production technological procedure is as described above. It also refers to cigarette, containing tobacco core, which is wrapped into outer envelopment, as well as to incomplete inner envelopment, presented by one or several stripes, made from reconstituted tobacco leaf. The inner envelopment is placed along the tobacco core, between the latter and outer envelopment. It also refers to reconstituted leaf tobacco, containing wood paste, binder and tobacco in defined proportion. The method of modified reconstituted leaf tobacco production includes the following operations. First, tobacco particle suspension is prepared in water solvent. The suspension obtained is then subjected to extraction processing at temperature of approximately 160°F for a period of approximately 30 minutes. Then the suspension is divided into extract with components, soluble in water, and solid fraction, which is mixed with wood paste and formed into leaf of reconstituted tobacco, using Fourdrinier machine. The extract is centrifugated, concentrated, supplemented with first binder and wetting reagent, applied to leaf of reconstituted tobacco and dried. Afterwards, the leaf is processed as described above.

EFFECT: decrease of ignitability for smoking products with one-layer envelopment.

50 cl, 8 dwg, 3 tbl, 3 ex

Description

The present invention relates to a method for manufacturing reconstituted tobacco sheet, in particular, to a method for manufacturing reconstituted tobacco sheet containing a gel matrix flavor, and particularly relates to a method for manufacturing reconstituted tobacco sheet containing an alginate compound, similarly to a paper manufacturing method.

In the manufacture of smoking articles, in particular cigarettes, a certain number of strips of reconstituted tobacco are usually added to the tobacco mixture. Reconstituted tobacco is usually made from tobacco fines, veins of tobacco leaf, tobacco waste consisting of medium veins, and other tobacco waste that are processed and formed into sheets, cut into strips and mixed with freshly cut tobacco. The amount of reconstituted tobacco in the tobacco mixture used for the manufacture of smoking products is different, but usually does not exceed 20%. Typically, reconstituted tobacco made in a manner analogous to the papermaking process does not contain additional binders such as alginate, guar gum, xanthan gum, gum arabic, pectin, other gums and modified celluloses.

Of particular concern to manufacturers of smoking products is the need to reduce the flammability of smoking products, since a significant number of fires have been recorded caused by the contact of burning cigarettes with flammable materials. Therefore, the tobacco industry has made numerous attempts to develop smoking products with a low degree of flammability. Many of the proposed solutions to this problem consider the possibility of modifying the wrapper of the smoking article accordingly. So, in particular, a special coating of the wrapper or the introduction of special additives to its composition, reducing its porosity or changing its chemical properties, is proposed.

The present invention was based on the task of proposing a new composition of the reconstituted tobacco sheet and a method for its manufacture.

Another objective of the present invention was to provide a smoking article containing a reconstituted sheet tobacco of a new composition, with a single-layer wrapper.

Another objective of the present invention was to provide a new composition of the reconstituted leaf tobacco coated with an alginate base and a method for its manufacture.

An object of the present invention was also to provide a smoking article comprising reconstituted sheet tobacco of a new composition with an alginate-based coating, with a conventional single-layer wrapper.

The present invention provides reconstituted leaf tobacco containing up to about 80 wt.% Tobacco, preferably up to about 60 wt.%, Wood pulp, up to about 30 wt.%, Preferably up to about 20 wt.%, A binder (e.g. alginate, guar gums, xanthan gum, gum arabic, pectin, other gums and modified cellulose compounds) and up to about 30 wt.%, preferably from about 3 to about 5 wt.%, flavorings.

Methods for manufacturing reconstituted leaf tobacco are well known and widely used in the tobacco industry. The present invention provides a method for manufacturing reconstituted leaf tobacco containing a binder for reducing porosity of a leaf and reducing flammability and burning speed of a cigarette. As a binder, you can use alginate, guar gum, xanthan gum, gum arabic, pectin, other gums and modified cellulose. The resulting reconstituted tobacco sheet with a binder is cut into strips of a certain width, which are used in the manufacture of a smoking article.

More specifically, the invention provides a method for manufacturing reconstituted leaf tobacco with a binder, comprising preparing a slurry containing a mixture of up to about 80 wt.% Tobacco and up to about 30 wt.% Binder, and coating the prepared suspension with a reconstituted tobacco sheet containing up to about 80% wood pulp.

In one particular embodiment for preparing a suspension, tobacco is first added to the aqueous solvent, and then the binder, and before being applied to the reconstituted tobacco sheet, the tobacco and binder are dispersed in the aqueous solvent.

A humectant may be added to the reconstituted tobacco sheet, for example, from the group consisting of glycerin and propylene glycol. Glycerin is used in an amount up to 30% by weight of the total mixture.

The invention also provides a method for manufacturing reconstituted leaf tobacco, which comprises preparing a suspension of a binder, humectant, tobacco and flavor, dispersing successively in an aqueous solvent up to about 80% tobacco, up to about 30 wt.% Binder, up to about 30 wt. % humidifier and up to about 30 wt.% flavoring, the prepared suspension covers a pre-made reconstituted tobacco sheet; the reconstituted tobacco sheet is cut into strips and several such longitudinal strips of reconstituted tobacco are placed in a cigarette adjacent to its tobacco rod.

In addition, the invention also provides a method for manufacturing a modified reconstituted tobacco sheet, which comprises preparing a suspension of tobacco particles in an aqueous solvent, the suspension is subjected to extraction treatment at a temperature of about 160 ° F. for about 30 minutes, and the suspension is separated into an extract with soluble water components and the solid fraction, the solid fraction is mixed with wood pulp, used in an amount up to about 80 wt.%, from the solid fraction on a grid of long-mesh paper The reconstituted tobacco sheet is molded, the extract is centrifuged and concentrated, the first binder is added to the extract in an amount of up to about 30 wt.%, the moisturizer is added to the extract in an amount of up to about 30 wt.%, the extract is applied to the reconstituted tobacco sheet with subsequent drying, sheet reconstituted tobacco is cut into strips and several such longitudinal strips of reconstituted tobacco are placed in a cigarette adjacent to its tobacco rod.

Further, the invention also provides a cigarette comprising a tobacco rod wrapped in an outer paper wrapper and an incomplete inner wrapper in the form of one or more strips of reconstituted tobacco sheet containing up to about 80% by weight of wood, extending along the tobacco rod between it and the outer wrapper. pulp, up to about 30 wt.% binder and up to about 80 wt.% tobacco, with a coating containing up to about 80 wt.% tobacco and up to about 30 wt.% binder.

In private embodiments, the inner wrapper contains up to about 30 wt.% Flavor, up to about 30 wt.% Humidifier. The humectant may also be selected from the group consisting of glycerin and propylene glycol.

Other features and advantages of the present invention are described in more detail in the following description, including examples of the manufacture of reconstituted tobacco sheet according to the invention.

The objects of the present invention and its advantages are discussed in more detail below on the example of preferred options for its implementation with reference to the accompanying drawings, which show:

figure 1 is a perspective view of a cigarette according to the present invention with a cigarette according to the invention, reconstituted leaf tobacco with an incomplete two-layer wrapper,

figure 2 is a perspective view of an expanded cigarette wrapper with the proposed in the invention sheet reconstituted tobacco,

figure 3 is an end view of the cigarette shown in figure 1,

figure 4 is a perspective view of a cigarette paper with reconstituted sheet tobacco in accordance with another embodiment of the invention,

5 is a perspective view of cigarette paper with reconstituted tobacco sheet in accordance with another embodiment of the invention,

in Fig.6 is an end view of a cigarette in a wrapper of cigarette paper shown in Fig.5,

7 is a perspective view of a cigarette with a partially removed wrapper from a cigarette paper with reconstituted tobacco sheet of the present invention; and

on Fig is a flowchart of the manufacturing process of strips of the inner wrapper of smoking articles from a sheet of modified reconstituted tobacco.

Figure 1 shows a cigarette 10 with an incomplete two-layer wrapper (hereinafter referred to as a simple "two-layer"), which allows you to change the burning speed of the cigarette. 1, the double-wrap cigarette 10 of the present invention has a regular tobacco rod 13 extending from the open end of the cigarette to the filter 15. The tobacco rod 13 is wrapped externally with cigarette paper 12. Separate strips 14a and 14b are arranged on the inside of the cigarette paper 12. forming an incomplete inner wrapper of the tobacco rod. The strips 14a and 14b serve as modifiers of the burning speed of the tobacco rod 13 and change the burning parameters of the cigarette 10. In the cigarette shown in figure 1, the inner strips run parallel (coaxially) to the axis of the tobacco rod 13 from the open end to the filter 15. The presence of the strips 14a in the wrapper and 14b, which in this example are parallel to the tobacco rod 13, allows the manufacture of cigarettes with different burning rates, depending on the density of the tobacco rod packing, the porosity of the outer wrapping paper 12, and the presence of certain extras avoc, the width of the strips 14a and 14b, their porosity and the presence of additives in them. The strips may not extend along the entire length of the tobacco rod 13, and may also extend in different directions. The invention allows, depending on the combination of various parameters, including those indicated above, to produce cigarettes 10 with a two-layer wrapper, the burning rate of which can be changed over a wide range.

As shown in FIG. 1, the cigarette 10 of the present invention, which may have a different burning rate, is wrapped externally with cigarette paper 12 with two first and second separate strips 14a and 14b. Cigarette paper 12 may have a normal porosity, typically equal to 15-80 Korest units. In addition to the outer wrapper 12 of cigarette paper, the inventive cigarette has at least one inner strip, the presence of which allows you to change the burning speed of the cigarette 10. For the cigarette shown in figure 1, the first and second strips 14a and 14b are located on different sides of the tobacco rod 13. To ensure that the burning speed of the cigarette is substantially constant over the entire length of the tobacco rod, the strips 14a and 14b should be parallel to the tobacco rod 13 along its entire length from the open end of the cigarette to the filter 15.

For the cigarette shown in FIGS. 1-4, the strips 14a and 14b extend along the entire length of the tobacco rod 13, and depending on the desired mode (speed) of burning of the cigarette, they can be located at equal or any other distance from each other.

The bilayer wrapper cigarette 10 according to the invention, shown in FIG. 3 in cross section, has high diffusion zones 21 and low diffusion zones 22 formed by stripes 14a and 14b. The cigarette wrapper 12 of the invention has at least one highly diffused zone 21 through which, with a normal smoke composition, relatively large amounts of CO and oxygen pass. In zones 22 with a low degree of diffusion, limited in the circumferential direction by the sizes of the strips 14a and 14b, the amount of passing gases depending on the porosity of the strips 14a and 14b and the outer wrapper 12 is significantly reduced. Zone 21 with a high degree of diffusion and zone 22 with a low degree of diffusion can have porosity, which is respectively more than 14 units of Korest and less than 8 units of Korest.

The outer wrapper 12 of the inventive modified cigarette 10 with a two-layer wrapper shown in the drawings is made of standard wrapping cigarette paper, the width of which is usually 27 mm. On the inner side of the outer wrapper 12 shown in FIG. 2 and FIG. 4, strips 14a and 14b are arranged along its entire length. The outer wrapper is made of standard cigarette paper of normal size with normal porosity, and the first and second strips 14a and 14b of paper 4 mm wide, the porosity of which is less than 8 Korest units. The total width of the strips 14a and 14b around the circumference of the inventive cigarette 10 with a partial two-layer wrapper can be about 8 mm, but can reach 15 mm around the circumference of the tobacco core of a cigarette of standard sizes. The effectiveness of the influence of the outer wrapper and the inner wrapper formed by the strips in any combination of them depends on the above parameters, in particular on the porosity of each of the wrappers, however, the width of the inner wrapper with a slight effect on smoke characteristics and aromatization and with good combustion parameters should be about 75%, preferably less than 60%, more preferably less than 35%, of the circumference of the outer wrapper. The particular choice of width of the inner wrapper depends on the quality of the cigarette and on the circumference of the outer wrapper. Actually manufactured cigarettes may differ from the cigarettes discussed in the present description, which in this respect only illustrates the invention and does not limit its scope.

As indicated below, the inventive cigarettes with different burning rates can have a very different performance. Depending on the desired mode and the desired burning rate, the wrapper of the cigarettes of the invention may have one or more inner strips. As noted above, a different combination of sections of the inner wrapper with low porosity and the outer wrapper with high porosity allows the manufacture of cigarettes with different, including predetermined, burning rates. So, for example, with a certain combination of porosity of the outer and inner wrappers and taking into account other factors, the usual speed of standard cigarettes, equal to 6.0 mm / min, can, if necessary, be reduced to 4 mm / min or lower. Cigarettes with such a burning rate should have an inner strip in the wrapper made of a material with low porosity, in particular reconstituted tobacco, paper with low porosity, polymeric materials or other paper or other materials. The inner strips can be coated with binders, such as alginates (e.g. sodium alginate), guar gum, xanthan gum, gum arabic, pectin, other gums, modified celluloses or hydrocolloid compounds that act as modifiers or flame retardants and create at least along the tobacco rod one zone with a low degree of diffusion. The binders reduce the porosity of the reconstituted tobacco sheet coated with them, which is used as a material for the inner strips, and together with the corresponding other factors, such as the porosity of the outer wrapper, the packing density of the tobacco core, the burning characteristics of the inner strips, the porosity of the inner strips and other factors, make it possible to produce cigarettes with the required burning rate.

As shown in FIGS. 4-7, different methods of the invention can be used to form zones of low porosity. FIG. 4 shows an expanded outer wrap 12 with a plurality of inner strips 16a, 16b, 16c and 16d. These strips can be located along the inner surface of the outer wrapper 12 at an equal distance from each other and removed from the edges of the wrapper, on which the wrapper wrapped in the headset of the cigarette machine is glued. Typically, the strips 16a-16d are fed into the headset of a cigarette machine and glued to the inner surface of the outer wrapper next to the tobacco rod. Covered with an alginate-based compound, the inner strips allow you to change the burning speed of the cigarette and bring it to the desired level, in particular, significantly reduce the static burning speed and make cigarettes with the necessary ability to self-extinguish.

As shown in FIG. 5, to create a low porosity zone in the outer wrapper 12, a non-linear strip 17 can be used. This strip 17 may have a wave-like shape in which the position of the low porosity zone changes along the tobacco rod. With such an indirect arrangement of the zone with low porosity, a burning cigarette in any position will have the necessary static burning rate.

Figure 6 shows a cigarette with a modified burning rate in accordance with another embodiment of the invention. The presence of a high diffusion zone 21 and a low diffusion zone 22 in this cigarette is due to the presence of an incomplete inner wrapper 18 on the cigarette, which is located on the inner side of the outer wrapper 12 and covers only part of the tobacco rod 13. As shown in FIG. 6, the incomplete inner wrapper 18 covers approximately half the perimeter of the tobacco rod 13. However, it should be noted that for the manufacture of cigarettes with the necessary linear burning rate, various modifiers of combustion modifiers can be used. Incomplete inner wrapper 18 can be made from standard cigarette paper with a low porosity of less than 7 Korest units coated with burning rate modifiers, or from other materials, for example, from reconstituted tobacco sheet with or without additives, which usually has a low porosity of less than 5 Korest units, preferably less than 3 units of Korest. An additional advantage of using reconstituted tobacco for the manufacture of an incomplete inner wrapper 18 is that such a wrapper will have the same color as the tobacco rod 13 and will not contrast with the low diffusion zone 22. As a material for the manufacture of an incomplete inner wrapper 18, a polymer film or other material may be used. For the manufacture of cigarettes with the required burning rate, preferably less than 4.0 mm / min, it is advisable that the incomplete inner wrapper shown in FIG. 6 has a width of 2 to 14 mm or covers less than 75% of the circumference of the outer wrapper.

7 shows a cigarette according to another embodiment of the invention, with several inner strips 19 located on the inner surface of the outer wrapper 12 of the tobacco rod 13. These strips 19 can be fed into the headset of the cigarette machine together with the outer wrapper 12 in this way so that after the formation of the cigarette they were located on the periphery of the tobacco rod 13. In the headset of the cigarette machine, you can individually supply the finished strips 19 of low-porosity cigarette paper, or you can serve one or more wider bands and cut it (them) directly in the cigarette machine into strips of the required width. The strips 19 shown in FIG. 7 are located on one axis substantially along the entire length of the tobacco rod 13. The strips 19 are advantageously arranged along the entire length of the tobacco rod 13, which allows the burning rate to be modified along the entire length of the tobacco rod regardless of the position of the cigarette. It seems that the presence of a cigarette several shown in Fig.7 strips 19 to an even greater extent affects the burning rate of the cigarette.

The location of the inner strips along the axis of the tobacco rod 13 along its entire length is associated with significant advantages compared to the implementation of strips in the form of alternating rings located perpendicular to the axis of the tobacco rod 13. Cigarettes with such annular stripes arranged alternately perpendicular to the axis of the tobacco rod differ in a variable burning speed of the tobacco rod 13 along its entire length. Cigarettes with ring strips have different wrap porosity along the length of the tobacco rod and different (low or high) linear burning speeds in different places. Changing the burning rate along the length of the tobacco rod makes the cigarette unacceptable for use, since long-term free burning of the tobacco rod between the rings does not correspond to the desired modification of the burning speed of the cigarette along the entire length of the tobacco rod. In addition, the smoker can puff at the moment when the smoldering end of the tobacco rod is in the zone with low porosity, i.e. at the location of the inner ring. It is likely that when the smoldering end of the tobacco rod passes through the location of the ring, the composition of the smoke entering the smoker's mouth can significantly change in the direction of increasing the content of CO and other compounds formed during the burning of the ring. This problem can be solved by using an incomplete inner wrapper in the cigarette of the invention, the presence of which provides a constant composition of smoke and a constant modified burning rate along the entire length of the tobacco rod.

In the inventive cigarette 10 with a modified burning rate, the inner wrapper consisting of several or one strip should be located at a certain distance from the edges of the outer wrapper 12 connected by glue. It is known that when gluing the outer wrapper 12 of the cigarette along the seam 23 shown in FIG. 1 , in a cigarette machine, one side edge 24 of the wrapper is superimposed on the other. Typically, in the manufacturing process of cigarettes, a layer of glue is applied to one of the edges 24 of the wrapper before folding the outer wrapper and forming the tobacco rod 13. In the manufacture of a modified burning rate cigarette 10 of the present invention to form the outer wrapper 12 and the tobacco rod and glue the outer wrapper, the inner wrapper should be at a distance from the seam. As shown in the drawings, in all embodiments of the invention, the inner wrapper is spaced from the side edges 24 of the outer wrapper and does not interfere with the formation of the tobacco rod in the headset of the cigarette machine and the gluing of the outer wrapper 12. The cigarette of the invention can be manufactured on conventional cigarette machines without changing their headset, but with a slight upgrade to the paper feeder. It should be noted that in any embodiment shown in the drawings, linear zones of a cigarette with high and low porosity can be obtained by arranging and attaching strips with adhesive or other means on the outer surface of the cigarette.

The modified burning rate cigarette according to the invention can be made using paper with various characteristics as an outer and inner wrapper. As already noted above, the outer wrapper of a standard cigarette has an expanded width of 27 mm and a porosity ranging from 15 to 80 Korest units. It is well known that a significant decrease in the porosity of the outer wrapper significantly affects the composition of the smoke and the linear burning rate of the cigarette. Using an incomplete inner wrapper to make regular cigarettes, their burning rate can be modified. The incomplete inner wrapper shown in the drawings may consist of one or more strips. The inner wrapper can be made of paper with a significantly lower porosity of less than 8 units of Korest. A single-strip inner wrapper may have a width of 2 to 15 mm. The porosity of the inner wrapper can range from 0 to 8 Korest units.

Examples

Below the invention is illustrated by examples. However, it should be noted that these examples do not limit the scope of the invention.

Example 1

Proposed in the invention method made several samples proposed in the invention of cigarettes with an incomplete inner wrapper. The cigarettes according to the invention were compared with control cigarettes without an inner wrapper with a linear burning rate of about 4.3-4.7 mm / min.

The inner wrapper of the cigarettes was made from various materials indicated in the tables below, including ordinary paper and ribbon tobacco processed in an appropriate manner.

Examples of cigarettes with two strips of inner wrapper made from tape tobacco with a porosity of less than 5 Korest units Cigarette Outer wrap porosity, Korest units The citrate content in the outer wrapper,% Number of Inner Strips The width of the inner strip, mm Linear burning rate (LSG), mm / min The number of self-extinguishing on 10 layers,% one fifty 0.5 0 0 4.3 0 2 fifty 0.5 2 four 3,1 one hundred 3 fifty 0.5 2 5 2.6 one hundred four fifty 0.5 2 6 2.7 one hundred 5 40 0.7 0 0 4.7 0 6 40 0.7 2 3 3.8 48 7 thirty 0.6 0 0 4.3 0 8 thirty 0.6 2 four 3,1 one hundred

Examples of cigarettes with two strips of processed or coated with sodium alginate cigarette paper with a porosity of less than 5 Korest units Cigarette Outer wrap porosity, Korest units The citrate content in the outer wrapper,% Number of Inner Strips The width of the inner strip, mm Linear burning rate (LSG), mm / min The number of self-extinguishing on 10 layers,% 9 70 0.6 0 0 4.4 0 10 70 0.6 2 2 3.8 25

From the above examples it follows that according to the linear burning rate and spontaneous attenuation, the inventive cigarettes with an additional inner wrapper that does not completely cover the tobacco core are different from conventional control cigarettes. Proposed in the invention an additional inner wrapper can reduce the burning rate of cigarettes up to 40%. All cigarettes with inner strips of at least 4 mm wide went out spontaneously. Reducing the width of the inner strips reduced their effectiveness, which can be increased by special additives or by increasing the number of strips. Testing of cigarettes for spontaneous attenuation on 10 layers was carried out according to the flammability test method developed by the National Institute of Standards and Technology (USA).

Smoking tobacco product with strips of reconstituted tobacco

Strips 14 of an incomplete inner wrapper can be made from reconstituted tobacco, the composition and manufacturing method of which are indicated below. The porosity of the cigarette paper 12 of the outer wrapper is usually in the range of 15 to 80 Korest units. In the cigarette shown in FIG. 1, the incomplete inner wrapper consists of two strips 14 of a reconstituted tobacco sheet, on the diametrically opposite sides of the tobacco rod 13. The strips 14 extend along the entire length of the tobacco rod 13 parallel to its axis. In this embodiment, the strips are located at an equal distance from each other, and therefore the burning rate remains constant along the entire length of the tobacco rod.

Production of reconstituted leaf tobacco with a binder

On Fig shows a block diagram of the technological process of manufacturing the inner strips of modified reconstituted tobacco. In the manufacture of reconstituted leaf tobacco intended for use in cigarettes as strip material, from tobacco fines, medium veins, pharmacy, cut leaf blades, crushed medium veins or mixtures of these tobacco materials are suspended in an aqueous solvent using 11-20 parts of an aqueous solvent one piece of tobacco. The solution was subjected to extraction for about 30 minutes at a temperature of about 160 ° F. Then the solution by known methods, for example by centrifugation or filtration, is separated into an extract with water-soluble components and a solid / fiber fraction. The solid / fiber fraction is ground and mixed with more than 10% wood pulp made from ground wood fiber and optionally a second binder such as alginate (e.g. sodium alginate), guar gum, xanthan gum, arabic gum, pectin, other gums, modified celluloses and hydrocolloid compounds. From the obtained mixture of the solid / fibrous fraction of tobacco, wood pulp and a possibly used second binder, reconstituted sheet tobacco is made in a manner analogous to the known paper making method.

The extract, if necessary, can be treated with specific adsorbents to selectively remove unwanted impurities from it. After that, the extract is centrifuged and the adsorbent with impurities is removed. Then the extract is concentrated. A first binder, such as alginate (e.g. sodium alginate), guar gum, xanthan gum, gum arabic, pectin, other gums, modified celluloses and hydrocolloid compounds, is added to the extract. In addition, to give the reconstituted tobacco sheet the desired plasticity, a humectant, for example glycerin, can be added to the extract, which is added before the binder and any additional flavoring are added. The fragrance gives the extract a pleasant smell.

The resulting extract-containing mixture is applied to a reconstituted tobacco sheet. If necessary, a third binder is applied from the solution to the reconstituted tobacco sheet, for example alginate (e.g. sodium alginate), guar gum, xanthan gum, gum arabic, pectin, other gums, modified celluloses and hydrocolloid compounds, using the size press used in the paper industry and / or by spraying a binder solution on a reconstituted tobacco sheet. Then, the reconstituted tobacco sheet is dried, cut into strips of the required width and wound onto a bobbin. The resulting strips can be located on the periphery of the tobacco rod on the inner surface of the outer wrapper and used as elements of the inner wrapper of cigarettes with different burning speeds.

The resulting reconstituted tobacco should preferably contain up to about 80 wt.% Tobacco, up to about 80 wt.%, Preferably up to about 60 wt.%, Wood pulp, up to about 30 wt.%, Preferably up to about 20 wt.%, A binder and up to about 30 wt.%, preferably from about 3 to about 5 wt.%, of a possible flavor.

The following examples describe in detail the manufacturing process of reconstituted sheet tobacco with a binder for use in smoking articles.

Example 2

In the manufacture of reconstituted leaf tobacco, 500 pounds of a mixture of tobacco material and wood pulp (in a ratio of 1: 3 to 3: 1) were subjected to extraction treatment with 750 gallons of water in a mixing tank, keeping the mixture at a temperature in the range of 140 to 190 ° C. for 30 -45 min Upon completion of the extraction treatment, the mixture was centrifuged, filtered or squeezed, separating it into a solid (fibrous) fraction and a liquid fraction (extract).

The concentration of the liquid extract was increased in a vacuum evaporator, mixed with glycerol in the amount of 60 pounds and mixed thoroughly. An alginate solution was prepared in a separate container, carefully dispersing 40 pounds of sodium alginate in 135 gallons of water. Then the concentrated extract with glycerin was mixed with an alginate solution and thoroughly mixed. After that, at an optional process stage, the liquid extract was stirred for 20-45 minutes to selectively remove nitrogen and other undesirable impurities from it, and the stirrer was low-speed mixed with 75 pounds of powder adsorbent such as bentonite (diatomaceous earth), coal, cyclodextrin, cellulose acetate or mixtures of these adsorbents. After stirring, the adsorbent was separated from the extract by centrifugation and sent to waste. Then, as mentioned above, the extract was concentrated and mixed with glycerin and alginate.

The solid fraction was passed through a refiner to fibrillate the fibers to produce tobacco wood pulp. Base sheets of reconstituted tobacco were cast from this pulp onto a mesh of a long-mesh paper machine and then dried. After that, one of the two previously prepared concentrated extracts was applied to the base sheets of reconstituted tobacco, either in a size press or by spraying. The finished sheet was dried and cut into strips, which were wound on bobbins for their use in the manufacture of inner wrappers for smoking articles.

Example 3

Tobacco sheets were made and cut analogously to example 2, except that the alginate solution was applied directly to the base sheet, rather than mixed with a concentrated extract. In addition, 25 pounds of precipitated chalk or chitosan (inorganic or organic inert fillers) were added to the pulp obtained in the refiner before the manufacture of the base sheet on a mesh of a long-mesh paper machine. As other inert fillers, liposan and mixtures of chalk, chitosan and liposan can be used.

Obviously, the invention is not limited to the specific examples discussed above, and that with a corresponding change in the amount of constituents in the mixture used to make the reconstituted tobacco sheet, the parameters of the tobacco material may differ from the parameters of the tobacco material obtained in the above examples.

Claims (50)

1. A method of manufacturing a sheet of reconstituted tobacco with a binder, which consists in preparing a suspension containing in a mixture up to about 80 wt.% Tobacco and up to about 30 wt.% A binder, and a pre-prepared reconstituted tobacco sheet containing up to about 80% wood pulp. 2. The method according to claim 1, wherein the reconstituted tobacco sheet contains up to about 60% by weight of wood pulp. 3. The method according to claim 1, in which the suspension contains up to about 20 wt.% A binder. 4. The method according to claim 1, in which up to about 30 wt.% Flavoring is added to the mixture. 5. The method according to claim 4, in which the flavor is added to the mixture in an amount of from about 3 to about 5 wt.%. 6. The method according to claim 1, in which to prepare the suspension, tobacco is first added to the aqueous solvent, and then the binder is dispersed in the aqueous solvent before being applied to the reconstituted tobacco sheet on the reconstituted tobacco sheet. 7. The method according to claim 1, wherein the binder is selected from the group consisting of alginate, guar gum, xanthan gum, gum arabic, pectin, other gums, modified celluloses and hydrocolloid-based compounds. 8. The method according to claim 7, in which sodium alginate is used as an alginate. 9. The method according to claim 1, in which a moisturizer is added to the reconstituted tobacco sheet. 10. The method according to claim 9, in which the humidifier is selected from the group comprising glycerin and propylene glycol. 11. The method according to claim 10, in which glycerin is used in an amount up to 30 wt.% By weight of the entire mixture. 12. The method according to claim 1, wherein the reconstituted tobacco sheet is cut into strips and several such longitudinal strips of reconstituted tobacco are placed in a cigarette adjacent to the tobacco rod. 13. A method of manufacturing a sheet of reconstituted tobacco, which consists in preparing a suspension of a binder, humectant, tobacco and flavor, sequentially dispersing in an aqueous solvent up to about 80% tobacco, up to about 30 wt.% Binder, up to about 30 wt.% Humidifier and up to about 30 wt.% flavor, the prepared suspension covers a pre-made reconstituted tobacco sheet; the reconstituted tobacco sheet is cut into strips and several such longitudinal strips of reconstituted tobacco are placed in a cigarette adjacent to the tobacco rod. 14. The method according to item 13, in which the binder is selected from the group comprising alginate, guar gum, xanthan gum, gum arabic, pectin, other gums, modified cellulose and compounds based on hydrocolloids. 15. The method of claim 14, wherein sodium alginate is used as the alginate. 16. The method according to item 13, in which the humidifier is selected from the group comprising glycerin and propylene glycol. 17. A cigarette comprising a tobacco rod wrapped in an outer paper wrapper and an incomplete inner wrapper in the form of one or more strips of reconstituted tobacco sheet containing up to about 80% by weight of wood pulp, up to about 30 wt.% A binder and up to about 80 wt.% Tobacco, with a coating containing up to about 80 wt.% Tobacco and up to about 30 wt.% Binder. 18. The cigarette according to 17, the inner wrapper of which contains up to about 30 wt.% Flavor. 19. The cigarette according to p, in which the content of the flavor is from about 3 to about 5 wt.% By weight of the inner wrapper. 20. The cigarette according to 17, in the inner wrapper of which contains up to about 30 wt.% The humidifier. 21. The cigarette of claim 20, wherein the humectant is selected from the group consisting of glycerin and propylene glycol. 22. The cigarette according to claim 17, wherein the binder is selected from the group consisting of alginate, guar gum, xanthan gum, gum arabic, pectin, other gums, modified celluloses and hydrocolloid-based compounds. 23. The cigarette of claim 22, wherein the alginate is sodium alginate. 24. The cigarette according to 17, in which the content of wood pulp is up to about 60 wt.% By weight of the sheet of reconstituted tobacco. 25. The cigarette according to 17, in which the content of the binder is up to about 20 wt.% By weight of the sheet of reconstituted tobacco. 26. Leaf reconstituted tobacco containing up to about 80 wt.% Wood pulp, up to about 30 wt.% Binder and up to about 80 wt.% Tobacco. 27. The reconstituted tobacco sheet of claim 26, containing up to about 60% by weight of wood pulp. 28. The reconstituted tobacco sheet of claim 26, comprising up to about 20% by weight of a binder. 29. The reconstituted tobacco sheet of claim 26, containing up to about 30 wt.% Flavor. 30. The reconstituted tobacco sheet of claim 29, comprising from about 3 to about 5 wt.% Flavor. 31. The reconstituted tobacco sheet of claim 26, containing up to about 30% by weight of a moisturizer. 32. The reconstituted tobacco sheet of claim 31, wherein the humectant is selected from the group consisting of glycerin and propylene glycol. 33. The reconstituted tobacco sheet of claim 26, wherein the binder is selected from the group consisting of alginate, guar gum, xanthan gum, gum arabic, pectin, other gums, modified celluloses and hydrocolloid compounds. 34. The reconstituted tobacco sheet of claim 33, wherein the alginate is sodium alginate. 35. The reconstituted tobacco sheet of claim 26, which is cut into strips placed in a cigarette adjacent to the tobacco rod. 36. The reconstituted tobacco sheet according to claim 35, from the sheet of which the first and second strips are made equally spaced from one another in a cigarette. 37. A method of manufacturing a modified sheet of reconstituted tobacco, which consists in preparing a suspension of tobacco particles in an aqueous solvent, the suspension is subjected to extraction processing at a temperature of about 160 ° F for about 30 minutes, the suspension is separated into an extract with water-soluble components and a solid fraction , the solid fraction is mixed with wood pulp, used in an amount up to about 80 wt.%, from the solid fraction on the grid of a long-mesh paper machine, a sheet of reduced tobacco, the extract is centrifuged and concentrated, the first binder is added to the extract in an amount of up to about 30 wt.%, the moisturizer is added to the extract in an amount of up to about 30 wt.%, the extract is applied to a restored tobacco sheet followed by drying, the restored tobacco sheet is cut into strips and several such longitudinal strips of reconstituted tobacco are placed in a cigarette adjacent to the tobacco rod. 38. The method according to clause 37, in which the particles of tobacco and an aqueous solvent are used in a ratio ranging from about 1:11 to about 1:20. 39. The method according to clause 37, in which the solid fraction and wood pulp are mixed with a second binder, used in an amount up to about 30 wt.%. 40. The method according to § 39, in which the second binder is selected from the group comprising alginate, guar gum, xanthan gum, gum arabic, pectin, other gums, modified cellulose and compounds based on hydrocolloids. 41. The method according to p, in which sodium alginate is used as an alginate. 42. The method according to clause 37, in which the extract is treated with adsorbents. 43. The method according to clause 37, in which the first binder is selected from the group comprising alginate, guar gum, xanthan gum, gum arabic, pectin, other gums, modified cellulose and compounds based on hydrocolloids. 44. The method according to item 43, in which sodium alginate is used as an alginate. 45. The method according to clause 37, in which the humectant is selected from the group comprising glycerin and propylene glycol. 46. The method according to clause 37, in which the flavor is added to the extract in an amount up to about 30 wt.%. 47. The method according to item 46, in which the flavor is added to the extract in an amount of from about 3 to about 5 wt.%. 48. The method according to clause 37, in which an inert filler is added to the solid fraction before forming the reconstituted tobacco sheet on a mesh of a long-mesh paper machine. 49. The method according to p, in which the inert filler is selected from the group comprising chalk, chitosan, liposan and mixtures thereof. 50. The method according to clause 37, in which a third binder selected from the group consisting of alginate, guar gum, xanthan gum, gum arabic, pectin, other gums, modified cellulose and hydrocolloid compounds is applied to the reconstituted tobacco sheet.

Images