Low-flammability cigarette paper

FIELD: tobacco industry.

SUBSTANCE: low-flammability cigarette paper is intended for smoking materials. It contains a base with areal density more than 22 g/m2 and many burning limiting areas which are spread over base cigarette paper surface. Burning limiting areas are made by application of sodium alginate with polymerisation degree from approx. 500 to approx. 900 or by application of 3% sodium alginate water solution with density degree 19000 centipoise or more at 25°C. Low-flammability base-containing cigarette paper contains filler in quantity 2 g/m2 or more, have air permeability from 30 to 60 KOREST units and sodium alginate is applied in quantity less than 3 g/m2.

EFFECT: flammability lowering.

14 cl, 1 dwg, 2 tbl

 

The present invention relates to a cigarette paper with low Flammability.

Was offered the cigarette paper with a low level of permeability of the basics of cigarette paper made by coating salt of alginic acid, at least part of the cigarette paper to the burning end of the cigarette, the fallen, for example, on the floor, did not cause the fire floor if he fell, for example, due to the negligence of the smoker (see published application Japan No. 7-300795).

In published application Japan No. 7-300795 indicated that determined the permeability of cigarette paper, covered with a salt of alginic acid. But it was not specified a valid ability cigarette paper to the fire.

The authors of the present invention investigated the effect of sodium alginate (one of the salts of alginic acid) on the actual ability to fire cigarette paper and, as a result, found that the floor needed to ensure a certain ability to fire depends on the degree of polymerization or viscosity of sodium alginate.

Specifically, the present invention is the creation of a cigarette paper having significantly reduced Flammability, when using a relatively small number of covering substance.

According to the first aspect of the infusion is his invention offers a cigarette paper with low Flammability, contains the basis weighing more than 22 g/m2and many areas, limiting the combustion posted on one surface of the base cigarette paper, and the field limiting combustion, formed by the deposition of sodium alginate having a degree of polymerization of from about 500 to about 900.

According to the second aspect of the present invention offers a cigarette paper with low Flammability, containing the basis weighing more than 22 g/m2and many areas, limiting the combustion posted on one surface of the substrate, each of the areas bounding the combustion, formed by the deposition of sodium alginate, 3% wt. an aqueous solution which has a viscosity of 19000 JV or more at 25°C.

According to a third aspect of the present invention offers a cigarette paper with low Flammability, containing base with a filler in the amount of 2 g/m2or more, weighing more than 22 g/m2and air permeability of 30 to 60 CORESTA units, and many areas, limiting the combustion posted on one surface of the base cigarette paper, and the field limiting combustion, each formed by coating of sodium alginate in an amount of less than 3 g/m2; and with this cigarette paper which allows a cigarette, in which the percentage of the length of complete combustion (CPAP) is from 0% to 10% when measured according to ASTM E-2187-04 (ASTM - American society for testing and materials).

The drawing is a schematic representation of a perspective view with partial cut approximate cigarettes, wrapped in cigarette paper according to a variant implementation of the invention.

The present invention is explained in more detail below.

The cigarette paper according to the invention is a paper, which formed lots distant from other areas, limiting combustion, in which the base cigarette paper applied agent, limiting the combustion consisting of sodium alginate.

The base cigarette paper is plain paper, suitable for cigarettes, for which the use of conventional pulp, for example, flax pulp. This paper base may contain commonly used filler comprising a carbonate, for example calcium carbonate or potassium carbonate, and hydroxide such as calcium hydroxide or magnesium hydroxide, in the amount of 2 g/m2or more. The filler in the base cigarette paper may be contained in an amount of 2 g/m2to 8 g/m2. The base cigarette paper usually has a surface density greater than 22 g/m2. The surface density is usually 80 g/m2or m is it and preferably more than 20 g/m2to 28 g/m2or less. The permeability of the basics of cigarette paper is usually from 30 to 60 CORESTA units.

The basis of the cigarette paper may be added to the agent regulating the combustion, for example, citric acid or its salt (sodium salt, potassium salt). Usually the agent regulating the burning, if it is added in the base paper is 2 wt.% or less.

Many areas, limiting combustion, which form accordingly by coating agent (sodium alginate), limiting the burning, have a distance from each other on one surface of the base cigarette paper. When a tobacco rod wrapped in cigarette paper, area, bounding the combustion continues in the longitudinal direction of the tobacco rod in such a way that they are in the form of multiple strips spaced from each other around the circumference of the tobacco rod. In an alternative embodiment, these burning area can pass around the circumference of the tobacco rod so that they were located in as many round belts spaced from each other along the tobacco rod.

According to the invention as an agent for limiting combustion, using sodium alginate. Alginic acid is polihronova acid, SOS is oasa of two types of monomers, β-D-mannurone acid and α-L-guluronic acid. In the embodiment of the invention using sodium salt of alginic acid having a degree of polymerization of from 500 to 900. In another embodiment of the invention using 3 wt.% the sodium alginate in aqueous solution, having a viscosity of 19000 JV or more at 25°C. the Degree of polymerization and viscosity alginic acid, to some extent, correlate with each other. When using the sodium alginate with a high degree of polymerization or viscosity, can be achieved the same level of decrease in the ability to fire even when smaller amounts of substances of the coating than in the case of other sodium alginate. The above-mentioned viscosity is usually 40000 SP or less.

Usually the total amount of matter (dry weight) of the coating agent, limiting the combustion of sodium alginate is less than 3 g/m2in the field of coating. Even with a very small amount of substance coverage of 0.2 g/m2up to 2 g/m2can be achieved a significant reduction in the ability to fire. When using the cigarette paper according to the invention it is possible to get a cigarette (cigarette in which tobacco rod wrapped in cigarette paper), in which the percentage of the length of complete combustion (CPAP) ranges from % to 10% when measured according to ASTM E-2187-04.

The cigarette paper according to one embodiment of the invention includes a base containing a filler in the amount of 2 g/m2or more, with a surface density greater than 22 g/m2and breathability constituting from 30 to 60 CORESTA units, and contains many areas, limiting the combustion posted on one surface of the base cigarette paper. The bounding region for the combustion, is formed by coating of sodium alginate in an amount of less than 3 g/m2. Cigarette manufactured by wrapping the tobacco rod of this cigarette paper, shows the percentage of the length of complete combustion (VSP)of from 0% to 10%, when measured according to ASTM E-2187-04.

Cigarette paper with low Flammability according to the invention can be used for wrapping her tobacco rod, consisting of the tobacco filling, for example, rolling tobacco, and usually, the surface, which is applied to the agent, limiting the combustion, is introduced into contact with the tobacco rod.

The drawing shows a cigarette, wrapped in cigarette paper, which is applied to the agent, limiting the combustion, in the form of a circular bands.

The cigarette 10 in the form of a column contains the tobacco rod 11, which consists of tobacco filling 13, wrapped in cigarette paper 12. The tobacco rod 11 typically has a length along the circumference of 17 mm to 26 mm and d is inu from 49 mm to 90 mm In accordance with the usual method of manufacture of cigarettes to the middle end 11b of the tobacco rod 11 (i.e. the end located downstream in the direction of its Smoking) may be attached to a conventional filter 18 with double paper 17.

On cigarette paper 12 formed many areas 14 in the form of a circular bands, which caused the agent (sodium alginate), limiting combustion, and these areas are, respectively, represent the areas bounding the combustion. These areas 14 in the form of a circular bands, limiting combustion, formed at a distance from each other in the longitudinal direction of the tobacco rod.

Regular burning region 15, which was not applied agent regulating combustion, is located between adjacent regions 14 in the form of a circular bands, limiting combustion. Because this region 15 consists of cigarette paper 12, it can burn under normal conditions of Smoking, the cigarette paper 12. Thus, the region 15 acts as a normal burning area. Cigarette paper 12 can be provided, for example, two or three areas 14 in the form of a circular bands, limiting combustion. Region 14 in the form of a circular band limiting combustion, may have a width from 4 mm to 7 mm in the longitudinal direction, and its thickness may typically be from 0.1 μm to 5 μm. The distance between the neighboring regions 14, bounding the combustion is preferably from 18 mm to 25 mm

In the cigarette shown in the drawing, the agent, limiting the combustion, is not applied in the field of 16 at a distance d from the distant end of a cigarette. The end part, which is not caused to the agent, limiting the combustion, is an ordinary combustible region 16, and it can correspond to the area that is burned for one or two puffs when Smoking regular cigarettes. The distance d may range from 10 mm to 25 mm distant from the end 11a of the tobacco rod. There is no special need in education area 14, bounding the combustion, on the inner surface of the cigarette paper, the relevant part of the cigarette paper 12, covered, such as paper 17.

Now, after ignition the remote end 11a Shiretoko rod 11 of the cigarette 10 and while Smoking it, which results in the burning cigarette, cigar, you can burn as a normal cigarette in the usual burning areas 15, tasting the pleasure of Smoking. However, in the case of exposure to cigarette 10 in the burning condition on flammable objects such as carpet, tatami-Mat flooring, wood flooring, fabrics and clothes, the fire is extinguished due to the absorption of heat by region 14, bounding the combustion, in the direction of burning and flammable objects in combination with particles of tobacco contained in tabac the second rod, what prevents ignition of flammable objects from the outstanding butt.

The present invention is explained below by examples, which, however, are not intended to limit the scope of the invention.

Examples 1-6 and comparative examples 1-9.

First, the degree of polymerization and viscosity of sodium alginate used in the examples and comparative examples shown in Table 1. All used alginates, sodium manufactured by KIMIKA, and sodium alginates, which are indicated as ALG-1, ALG-2, ALG-3 and ALG-4 and ALG-5, available under the names ULV, IL-2, I-1, I-5 and I-S, respectively.

Viscosity values shown in Table 1, were obtained by injection of 200 g of 3 wt.% an aqueous solution of sodium alginate in chemical beaker of 200 ml or 300 ml, which was then placed in a water bath with a constant temperature, where the aqueous solution kept at 25°C±0.5°C; the solution was slowly stirred with a glass rod for about one minute so that it was not formed air bubbles, and then allowed to settle for about 10 minutes, after which determined the viscosity of the solution in the viscometer (B-type.

3 wt.% an aqueous solution of sodium alginate was applied (by printing) on the basis of the cigarette paper (with a width of 27 mm, length 1500 mm) with the characteristics shown in Table 2, the m way to get a fixed width of 7 mm in the longitudinal direction in the form of strips with fixed intervals of 20 mm by using a direct gravure printing, thus forming a total of 56 areas covered by the agent, limiting combustion. With regard to the received cigarette paper, the total number of substances coating of sodium alginate was determined using the following method. Results are also presented in Table 2. As shown in Table 2, the types of cigarette paper obtained in Examples 1-6, contained the substance of the coating agent, limiting the burning - in number to m2the area that caused the agent, limiting the burning (sodium alginate), comprising 1.5 to 2.0, In terms of amount of substance coating agent, limiting the burning, falling on one area of the cigarette paper, the received values from 0.39 g/m2to 0.52 g/m2as the amount of substance of the coating should be multiplied by 7/27.

Received cigarette paper used for wrapping the tobacco rod, made of American mixture of shredded tobacco (amount of resin in the absence of the filter was 19-20 mg)and the resulting tobacco rod is cut so that the first area floor was located at a distance of 5 mm (in the form of a band around the circumference) from the ignition of the constituent end of a cigarette. The length of one cigarette was 59 mm, and cigarette contains two areas with the coating agent, limiting the burning.

The resulting cigarettes were subjected to tests for combustion according to ASTM E-2187-04 to determine the value of the CPAP. The results are presented in Table 2.

Determination of the total quantity of the substance coating of sodium alginate

The amount of the substance coating of sodium alginate was determined as follows according to the method "Method of determining the quantitative content of sodium alginate in food products, described in the "Journal of food hygiene, vol. 5, pp. 297-302 (1988), without performing degreasing, dilute sulfuric acid and deproteinization.

Cigarette paper (length 1500 mm, width 27 mm, weight - about l,0 g)coated with the above-mentioned agent, limiting the burning, cut into squares with a side of 5 mm, was added 40 ml of 1 wt.% an aqueous solution of sodium bicarbonate was heated at 60°C in a hot bath for 5 minutes and then intensively stirred, and then processed in a centrifuge (3500 rpm, 10 minutes; as well as in subsequent trials) to obtain the supernatant (extract). The residue after extraction was extracted again under the same conditions mentioned above, to obtain the supernatant (e is stricta) and also added 20 ml of 1 wt.% an aqueous solution of sodium bicarbonate in the residue after extraction, which is then intensively mixed to obtain the supernatant (extract). Three of the obtained extract were combined together and added 1 wt.% an aqueous solution of sodium bicarbonate mixed in the extract to obtain 100 ml, which was used as a test solution.

2 ml managerinternational acid (8,5 mole of hydrochloric acid containing 0.05 wt.% pentahydrate of copper sulfate and 1 ml of naftalizola (0.4 wt.% an aqueous solution of 1,3-dihydroxynaphthalene) was added to each 1 ml of standard solution of sodium alginate (1% wt. an aqueous solution of sodium bicarbonate containing sodium alginate concentration of 0.0-0.2 mg/ml) and 1 ml of the above test solution. Each solution was heated in a bath of boiling water for 65 minutes, and then cooled in melt water. 4 ml of butyl acetate was added to the solution, which was then and which were processed in the centrifuge.

1 ml of the upper layer of the solution after processing in the centrifuge was collected and diluted with 3 ml of butyl acetate, and conducted quantitative colorimetric determination at a wavelength of 566 nm, thus calculating the total quantity of the coating [see Table. 1].

Table 1
Identification Ref is tion of sodium alginate The degree of polymerization of alginic acid (number of monomers)Viscosity, SP
ALG-130-180900
ALG-2250-4004700
ALG-3550-58019800
ALG-4650-67030000

When comparing Comparative examples 2 and 3 with Examples 1 and 2 shows that the number of agent-limiting combustion (sodium alginate), required to achieve the same magnitude of the CPAP (0 to 5), significantly less than in the case of Examples 1 and 2. Moreover, when comparing Comparative examples 6 and 7 with Examples 5 and 6 it is seen that in Examples 5 and 6, the magnitude of the CPAP significantly lower when using the same amount of substance coating (1.5 g/m2).

As described above, the present invention results from the cigarette paper, which have significantly reduced Flammability.

1. Cigarette paper with low Flammability, containing the basis weighing more than 22 g/m2and many areas, limiting the combustion posted on one surface is rnost fundamentals of cigarette paper, moreover, the field limiting combustion, formed by the deposition of sodium alginate having a degree of polymerization of from about 500 to about 900.

2. The cigarette paper according to claim 1, in which the surface density of the basics of cigarette paper 80 g/m2or less.

3. The cigarette paper according to claim 1, in which the field limiting burning, made in the form of multiple strips, which extend in the longitudinal direction of the tobacco rod and at a distance from each other around the circumference of the tobacco rod, when the cigarette paper wrapped around the tobacco rod.

4. The cigarette paper according to claim 1, in which the field limiting burning, made in the form of many round belts, which extend around the circumference of the tobacco rod and at a distance from each other in the longitudinal direction of the tobacco rod, when the cigarette paper wrapped around the tobacco rod.

5. The cigarette paper according to claim 1, which provides a cigarette, showing the value of the CPAP (percentage of the length of the complete combustion) from 0 to 10% when measured according to ASTM E-2187-04.

6. Cigarette paper with low Flammability, containing the basis weighing more than 22 g/m2and many areas, limiting the combustion posted on one surface of the substrate, and the field limiting combustion, formed through each of nonessentiality sodium, 3 wt.% an aqueous solution which has a viscosity of 19000 JV or more at 25°C.

7. The cigarette paper according to claim 6, in which the surface density is 80 g/m2or less, and the viscosity of sodium alginate is 40000 SP or less.

8. The cigarette paper according to claim 6, in which the field limiting burning, made in the form of multiple strips, which extend in the longitudinal direction of the tobacco rod and at a distance from each other around the circumference of the tobacco rod, when the cigarette paper wrapped around the tobacco rod.

9. The cigarette paper according to claim 6, in which the field limiting burning, made in the form of many round belts, which extend around the circumference of the tobacco rod and at a distance from each other in the longitudinal direction of the tobacco rod, when the cigarette paper wrapped around the tobacco rod.

10. The cigarette paper according to claim 6, which provides a cigarette, showing the value of the CPAP from 0 to 10% when measured according to ASTM E-2187-04.

11. Cigarette paper with low Flammability, containing a base containing filler in the amount of 2 g/m2or more and having a surface density greater than 22 g/m2and air permeability of 30 to 60 CORESTA units, and many areas, limiting the combustion posted on one main surface of the cigarette paper, to the second region, limiting combustion, each formed by coating of sodium alginate in an amount of less than 3 g/m2and this cigarette paper provides a cigarette, showing the value of the CPAP from 0 to 10% when measured according to ASTM E-2187-04.

12. The cigarette paper according to claim 11, in which the filler is contained in the basis in the amount of 8 g/m2or less, and sodium alginate applied on the base in an amount of from 0.2 to 2 g/m2.

13. The cigarette paper according to claim 11, in which the field limiting burning, made in the form of multiple strips, which extend in the longitudinal direction of the tobacco rod and at a distance from each other around the circumference of the tobacco rod, when the cigarette paper wrapped around the tobacco rod.

14. The cigarette paper according to claim 11, in which the field limiting burning, made in the form of many round belts, which extend around the circumference of the tobacco rod and at a distance from each other in the longitudinal direction of the tobacco rod, when the cigarette paper wrapped around the tobacco rod.



 

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38 cl, 3 dwg

FIELD: chemical industry; oil-refining industry; other industries; methods of production of the catalytic microporous fine-dispersed materials.

SUBSTANCE: the invention is pertaining to the method of production of the catalytic microporous fine-dispersed material, which is used in such processes, as purification of the oil fractions, purification of the sewage disposal, the catalytic conversion of the exhaust gases exiting from the combustion engines. The method allows to produce the catalytic microporous fine-dispersed material with the coating of the rare-earth metal oxide, in which the quantity of the metal oxide deposited on it is high without the risk for efficiency of the material. At that the rare-metal oxide is deposited on the outer surfaces of the indicated material and may be within the interval of 20-70 mass % with respect to with respect to the total equivalent content of the rare-earth metal oxide and the microporous fine-dispersed material. The method provides for the combination of the quantity of the colloid dispersion of the hydrate of the rare-earth metal oxide with the compatible microporous fine-dispersed material with formation of the suspension and the thermal treatment of the indicated suspension for the rare-earth metal oxide fixation on the outer surfaces of the indicated material. At that the indicated microporous fine-dispersed material has the average size of the pores less than 20 Å, and the indicated colloid dispersion has the particle size of the particles of not less than 20 Å. The invention also presents the catalytic free-loose fine-dispersed material with the rare-earth metal oxide coating containing the ceolite fine-dispersed material, the rare-earth metal oxide. At that the indicated ceolite fine-dispersed material has the average size of the pores less than the size of the particles of the indicated rare-earth metal oxide, and more than 20 mass % of the indicated rare-earth metal oxide is on the outer surfaces the indicated ceolite fine-dispersed material with respect to the total equivalent content of the rare-earth metal oxide and the ceolite. The ceolite free-loose fine-dispersed material having the high contents of the rare-earth metal oxide has the tendency to be the very stable material.

EFFECT: the invention ensures production of the catalytic microporous fine-dispersed material with the coating of the rare-earth metal oxide without the risk for efficiency of the material and the ceolite free-loose fine-dispersed material having the high contents of the rare-earth metal oxide has the tendency to be the very stable material.

31 cl, 11 ex, 3 tbl

FIELD: tobacco industry.

SUBSTANCE: cigarette with low-level side-stream smoke has common core 54 of tobacco and ignitable paper 56, 58 containing composition for treatment of side-stream smoke. Treatment composition contains, in combination, oxidation catalyst based on metal oxide - oxygen carrier and donor, and substantially non-ignitable additive in the form of particles, for said catalyst. Composition for treatment and/or adding of metal oxides or carbonates thereto facilitates in improvement of ash characteristics.

EFFECT: improved quality of cigarettes owing to usage of composition for treatment of side-stream smoke.

61 cl, 9 dwg

FIELD: cigarette industry.

SUBSTANCE: cigarette contains core of tobacco material and cigarette paper which encloses said core. Cigarette paper has specific air permeability of from 20 to 80 COREST units and contains filler in an amount of 1.4-3.7 g/m2 and burning regulating agent in an amount of 0-0.6 wt%. Tobacco material has filling density of 130-230 g/cm3. Cigarette exhibiting low flame spreading property so that when cigarette is left on substrate after static burning through predetermined distance, medium distance of movement of cigarette paper char line axially of cigarette to moment cigarette burning process has stopped is no more than 8 mm.

EFFECT: improved quality of cigarette having reduced flame spreading property.

21 cl, 3 tbl

FIELD: cigarette with reduced amount of side-stream smoke, in particular, cigarette wrapped with inner paper sheet and outer paper sheet.

SUBSTANCE: cigarette has tobacco portion including tobacco filler stick wrapped with inner wrapping paper sheet containing calcium carbonate in an amount less than 4 wt%, and with outer wrapping paper sheet containing calcium carbonate in an amount of 30 g/m2 or more and substance facilitating in regulation of burning process and used in an amount of 3 wt% or more.

EFFECT: reduced amount of side-stream smoke released at the rate of one cigarette.

11 cl, 1 tbl

FIELD: cigarette industry.

SUBSTANCE: cigarette with reduced release of side-stream smoke comprises standard tobacco core and burnable cigarette paper with side-stream treating composition. Said composition contains oxidizing metal oxide catalyst for oxygen storage and release, and substantially non-burning finely-dispersed porous additive provided in the form of particles. Method for reducing of side-stream smoke released by burning cigarette involves treating side-stream smoke with said composition contained within said burning cigarette paper.

EFFECT: increased efficiency in reducing of side-stream smoke upon reaching of suitable free burning rate of cigarette.

128 cl, 9 dwg, 10 tbl, 6 ex

FIELD: tobacco industry.

SUBSTANCE: proposed is cigarette paper for manufacture of self-extinguishing cigarette. The cigarette paper contains a filler agent in an amount of 2 - 6 g/m2, its weight being equal to 16 - 22 g/m2. On one side of the paper sheet there are flame-retardant segments provided for. The said segments are coated with a flame-retardant agent in an amount of 0.2 - 1.8 g/m2 of the coated segment area. The above flame-retardant agent is represented by sodium alginate. The polymerisation degree of the sodium alginate alginic acid varies within the 500-900 range.

EFFECT: fabrication of low flame propagation cigarette paper due to reduction of the cigarette carbon monoxide/resin ratio (C/T).

5 cl, 1 dwg, 2 tbl

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