EA038118B1 - Wrapping paper for a smoking article - Google Patents

Abstract

The invention relates to a smoking article comprising a wrapping paper, wherein the wrapping paper comprises a plurality of burn-suppressing regions that are provided apart from each other on a surface of a base paper, wherein the ratio of diffusion capacity between the burn-suppressing regions and the base paper is in the range of 5 to 35%.

Description

Technology area

The present invention relates to a wrapping paper for a smoking article that has a low flammability and a smoking article containing a wrapping paper that has a low flammability.

Background of the invention

If a burning smoking article is left on furniture and equipment such as a sofa or bed, it can cause a fire. To prevent this, several approaches are known from the prior art for providing self-extinguishing of a smoking article. These types of smoking articles are commonly known as low flammability smoking articles. However, self-extinguishing of the smoking article during use by a smoker is undesirable.

Document US 2013/104915 contains information on cigarette paper from which a cigarette with self-extinguishing properties is made, in which the base paper has a CO ₂ diffusivity of less than 0.35 cm / s, and the cigarette paper contains at least one discrete area, and this area is perforated and has an air permeability that is greater than the air permeability outside the perforated area.

US 2016/198761 relates to self-extinguishing cigarette paper that has treated areas on which a composition is applied that contains filler particles or a mixture of filler particles, the diffusion capacity of the treated areas being less than that of untreated areas of the cigarette paper. In this regard, at least 20% by weight of the filler particles in the treated areas are constituted by flocculent filler, non-uniform crystal filler, trigonal crystal filler or cubic filler.

To prevent fire and to suppress sidestream smoke flow, Japanese Utility Model No. 3049857 discloses a cigarette in which a tobacco rod is half the length of a conventional cigarette. Also, Japanese Patent Application KOKAI No. 7-327654 discloses a cigarette in which the length of the tobacco rod is reduced to 1-1.5 cm in order to prevent fire and to suppress side smoke flow. These cigarettes, having a shorter tobacco rod than conventional cigarettes, provide significantly fewer puffs than a commercially available cigarette.

An object of the present invention is to provide a wrapping paper for a smoking article that has a low flammability and a reduced taste impact.

Brief Description of the Present Invention

The inventors have found that by providing a wrapping paper for a smoking article with a plurality of burn-suppressing regions and a certain ratio of the diffusion capacity of the burn-suppressing regions to the base paper, i. E. areas that do not suppress combustion, it is possible to obtain a smoking article with a low flammability with a reduced impact on taste.

A first aspect of the present invention relates to a wrapping paper containing a base paper, the base paper comprising a plurality of flame-suppressing regions provided at a distance from each other, the ratio of the diffusion capacity of the combustion-suppressing regions to the base paper, i. E. areas that do not suppress combustion are in the range from 5 to 35%.

In another aspect of the present invention, there is disclosed a smoking article comprising a portion of smoking material surrounded by wrapping paper in accordance with the first aspect of the present invention. The smoking article, in particular, is a low flammability smoking article.

Additional aspects and embodiments of the present invention are disclosed in the dependent claims and may be borrowed from the following description and examples without being limited to them.

Description of drawings

The accompanying drawings are intended to illustrate embodiments of the present invention and convey their deeper understanding. Together with the description, they serve as an explanation of the concepts and principles of the invention. Other options for implementation and many of the stated advantages can be obtained in the part of the graphics.

FIG. 1 is a partially exploded schematic perspective view showing an example of a cigarette wrapped in cigarette paper having burn-suppressing regions in the form of stripes, according to one embodiment of the present invention.

The cigarette 10 comprises a tobacco rod 11 composed of a tobacco filler 13 that is wrapped in a wrapping paper 12 according to the present invention in the form of a column. A conventional filter 15 can be attached to the proximal end (i.e., the downstream end

- 1 038118 in the inhalation direction) 11b of the tobacco rod 11 by using the tipping paper 14 according to the conventional method.

A plurality of burn-suppressing regions 122 in the form of coated strips, as will be explained in the following description, are formed on one of the surfaces of the base paper 121 that forms the wrapping paper 12 of the present invention. These stripe-shaped burn-suppressing regions 122 are formed at a distance from each other in the circumferential direction of the tobacco rod 11.

The non-combustion suppressing regions 123 are formed between adjacent combustion suppressing regions 122 in the form of stripes. Since the regions 123 are formed by a portion of the base paper 121, they can burn in a normal smoking state. Therefore, each of the regions 123 functions as a non-combustion suppressing region. For example, each of the stripe-shaped combustion suppression regions 122 may have a width of 1-6 mm in the circumferential direction. The distance between adjacent combustion suppressing regions 122 may be 2-20 mm.

In the cigarette shown in FIG. 1, a non-combustion suppressing region 124 may be provided in the region covering the distance d from the tip 11a of the base paper 121.

FIG. 2 is a partially exploded schematic perspective view showing an example of a cigarette wrapped in cigarette paper having annular burn-suppressing regions in the form of a tape in accordance with another embodiment of the present invention.

The cigarette 20 has a structure similar to that of the cigarette 10 shown in FIG. 1, except for the design of the combustion-suppressing regions in the wrapping paper. Therefore, in FIG. 2, the same reference numeral is assigned to the same element as the structural element in FIG. 1, and its explanation is omitted.

In the cigarette 20 shown in FIG. 2, a plurality of annular burn-suppressing regions 211 are formed on the base paper 121 of the wrapping paper 21 wrapping the tobacco filler 13 defining the burn-suppressing regions. These annular burn-suppressing regions 211 are formed at a distance from each other in the longitudinal direction of the tobacco rod 11. The non-burn-suppressing regions 212 are formed between adjacent annular burn-suppressing regions 211 in the form of a tape. Since the non-combustion suppressing regions 212 are formed by a portion of the base paper 121, they can burn in a normal smoking state. Therefore, each of the regions 212 functions as a non-combustion suppressing region, in the same way as regions 123 in FIG. 1. For example, each of the annular combustion suppressing regions 211 in the form of a tape may have a width of 4-7 mm in the longitudinal direction. The distance between adjacent combustion suppressing regions 24 may be 18-25 mm.

Detailed description of the present invention

Unless otherwise defined, technical and scientific terms used in the context of this document have the same meanings as commonly understood by one of ordinary skill in the art to which this invention belongs.

All meanings given in the present description should be understood as complemented by the word approximately, unless the context indicates otherwise.

The smoking articles referred to in the context of this document are not particularly limited and may, for example, be cigarettes, cigarillos, or the like. For the most part, they have a generally cylindrical rod-shaped configuration and comprise a portion, roll, or column of smoking material, such as cut tobacco (eg, cut filler form), which is surrounded by a paper wrap to form a so-called tobacco rod. A cigarette or cigarillo also usually has a cylindrical filter element that is aligned with the tobacco rod. The filter element may, for example, comprise a cellulose acetate fiber plug and the fiber is surrounded by a wrapper material known as ficella. For the most part, the filter element is attached to one end of the tobacco rod using a surrounding wrap material known as a rim wrap. The rim-wrapped filter element is known as a mouthpiece element.

In the context of this document, weight% is to be understood as the weight percent based on dry weight of the base wrapping paper, unless explicitly indicated otherwise. In the present description, all amounts given in wt.% In a particular embodiment add up to 100 wt.%. Thus, the weight percentages are calculated by dividing the weight of each component by the dry weight of the base paper.

In the context of this document, a low flammability smoking article is a smoking article that has been designed to be less likely than a traditional cigarette to ignite furniture and equipment, such as soft furniture such as a sofa or mattress. Ideally, a low flammability smoking article will continue to burn while in a free hanging state, such as in an ashtray holder or when held in the hand without being puffed (free burning). The property of a cigarette to extinguish during free burning is called self-extinguishing.

The ability of a smoking article to extinguish or generate enough heat to

- 2 038118 continue to burn and therefore potentially cause ignition of bedding or upholstered furniture (called LIP) can be measured in any suitable way. In the present invention, this is done according to ISO 12863: 2010.

The likelihood of extinguishing a smoking article when burning in free air (called FASE) can be measured in any suitable way. In the present invention, this is done according to ISO 12863: 2010.

TNCO levels referred to in the context of this document mean tar, nicotine and carbon monoxide levels and can be measured in any suitable way. In the present invention, this is done according to ISO 3308: 2012.

The designation CU in the context of this document refers to the CORESTA breathability unit, which is widely used in paper specifications by the developers of smoking articles. The unit of air permeability CORESTA is defined as the volumetric flow rate of air in cubic centimeters per minute (cm ³ / min) passing through 1 square centimeter (cm ² ) of a substrate sample at an applied pressure difference of 1 kilopascal (kPa) and measured according to ISO 6565: 2011 ...

The number of puffs of the smoking article can be measured in any suitable manner. In the present invention, this is done according to ISO 3308: 2012.

The diffusion power of the wrapping paper is measured in the present invention according to the CORESTA Recommended Method No. 77 (CRM No. 77) dated April 2014.

The present invention relates to a wrapping paper for a smoking article comprising a base paper, the base paper comprising a plurality of flame-suppressing regions provided at a distance from each other, the diffusion capacity of the combustion-suppressing regions and the base paper being in the range from 5 to 35%. By providing such a ratio of the diffusibility of the combustion-suppressing regions and the base paper outside the combustion-suppressing regions (non-combustion-suppressing regions), it is possible to provide a smoking article with low flammability with a reduced impact on taste. The wrapping paper is formed from a base paper with combustion-suppressing regions provided therein. Since the regions of the wrapping paper that are on the outside of the burn-suppressing regions are to be regarded as non-burn-suppressing regions, the latter being the same as the base paper, in this application the terms non-burn-suppressing regions and paper -base are used interchangeably.

In certain embodiments of the wrapping paper of the present invention, the ratio of the diffusion capacity of the combustion-suppressing regions to the non-combustion-suppressing regions, i. E. base paper, is in the range from 10 to 35%, or from 15 to 35%, or from 5 to 30%, or from 10 to 30%, or from 15 to 30%, or from 10 to 25%, or from 15 to 25%.

In a particularly preferred embodiment, the ratio of the diffusion capacity of the combustion suppressing regions to the non-combustion suppressing regions is in the range of 9 to 17%. It was found that the impact on flavor is particularly reduced in this range, while the wrapping paper still shows good LIP and FASE performance.

Areas suppressing combustion can be provided on the surface of the base paper or embedded in the base composition of the base paper. A plurality of combustion suppressing regions may be provided on the same surface of the base paper. Alternatively, one or more of the plurality of burn-suppressing regions may be provided on the first surface of the base paper, and the rest of the plurality of burn-suppressing regions may be provided on the second, opposite surface of the base paper.

The shape and number of these combustion suppressing regions is no longer limited and can be varied according to the specific requirements of the smoking article. In certain embodiments, the combustion suppressing regions are in the form of stripes. In one embodiment, all of the strips are parallel to each other. In another embodiment, the at least two strips are not parallel to each other.

In certain embodiments of a given smoking article comprising wrapping paper, when the tobacco rod is wrapped in wrapping paper, the combustion-suppressing regions are in the form of stripes extending in the longitudinal direction of the tobacco rod and spaced apart in the circumferential direction of the tobacco rod.

In certain embodiments of the present smoking article comprising wrapping paper, when the tobacco rod is wrapped in wrapping paper, the combustion-suppressing regions are in the form of circular annular bands extending in the circumferential direction of the tobacco rod and spaced apart in the longitudinal direction of the tobacco rod. ...

In certain embodiments of the wrapping paper of the present invention, the diffusibility of the base paper, i. E. areas that do not suppress combustion is 1.0-2.0 cm / s, for example 1.0-1.8 cm / s, or, for example, 1.2-1.6 cm / s, or, for example, 1 , 2-2.0 cm / s, or, for example, 1.2-1.8 cm / s, or, for example, 1.2-1.6 cm / s, or, for example, 1.4-2, 0 cm / s, or, for example, 1.4-1.8 cm / s, or, for example,

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1.4-1.6 cm / s.

In certain embodiments of the wrapping paper, the diffusion capacity of the combustion suppressing regions is 0.10-0.35 cm / s, for example 0.15-0.35 cm / s, or, for example, 0.20-0.35 cm / s, or, for example, 0.10-0.30 cm / s, or, for example, 0.15-0.30 cm / s, or, for example, 0.20-0.30 cm / s, or, for example , 0.10-0.25 cm / s, or, for example, 0.15-0.25 cm / s, or, for example, 0.20-0.25 cm / s.

These areas of suppression of combustion may contain additives that reduce the diffusion capacity of the base paper. Additives that can be applied to the wrapper can be any of those used in the art to reduce the flammability of smoking articles.

In certain embodiments of the wrapping paper of the present invention, the burn-suppressing regions in the wrapping paper contain at least one additive that reduces the diffusion capacity of the base paper. Additives are optionally selected from the group consisting of alginates, polyvinyl alcohol, polyvinyl acetates, including partially hydrolyzed derivatives and copolymers, modified and unmodified starches, cellulose derivatives such as carboxymethyl cellulose, ethyl cellulose, hydroxymethyl cellulose, and combinations thereof. Additives can further include inorganic ions such as phosphates, mono- or divalent metal salts, silicon oxide species, or mixtures thereof. The additives may further contain natural gums such as guar gum.

Additives can be applied to wrapping paper with a carrier liquid, which can be in the form of a solution, suspension, emulsion, or a combination thereof. The carrier liquid can be aqueous, non-aqueous, or a combination thereof, and may contain an emulsifying agent, depending on the properties of the additives.

In one embodiment, the suspension of the additive can be applied within an aqueous carrier. The aqueous carrier penetrates the base paper, transferring the additive into its base composition. After the carrier has evaporated, the additive remains within the base paper composition, where it can reduce diffusion capacity before or during combustion of the smoking article. Once applied to the base paper, the carrier liquid has the ability to evaporate, allowing the wrapping paper to dry and the additive to anchor within the base composition of the base paper.

In certain embodiments of the wrapping paper of the present invention, the base paper comprises a fibrous material, a filler material, and one or more combustible additives.

In certain embodiments of the wrapping paper of the present invention, the base paper has a paper porosity of 10-60 CU and the total amount of combustible additive is 0.1-0.7% by weight, based on the dry weight of the base paper. By providing a base paper with such porosity and amount of combustible additive, it is possible to increase the number of puffs of the smoking article without affecting the TNCO levels and without changing the length or diameter of the tobacco rod.

In certain embodiments of the wrapping paper of the present invention, the base paper has a porosity of 10-50 CU, such as 15-45 CU. This further increases the number of puffs of the smoking article.

In certain embodiments of the wrapping paper of the present invention, the combustible additive is included in the base paper in an amount of 0.2-0.6 wt%, for example 0.3-0.5 wt%, based on the dry weight of the base paper. This further increases the number of puffs of the smoking article.

In certain embodiments of the wrapping paper of the present invention, the combustible additive is selected from the group consisting of citric acid salts such as sodium and potassium citrates, acetic acid salts such as sodium and potassium acetates, phosphoric acid salts such as sodium and potassium phosphates, tartaric acid salts, for example sodium and potassium tartrate, nitric acid salts, for example sodium and potassium nitrates, or mixtures thereof.

The combustible additive is generally not limited as long as it is suitable for use in a smoking article. In certain embodiments, citric acid salts are used.

In certain embodiments of the wrapping paper of the present invention, the amount of filler in the base paper is 17-28% by weight, for example 20-25% by weight, based on the dry weight of the base paper. This amount of filler provides sufficient resistance to the manufacturing forces that the wrapping paper is exposed to during high-speed production, and also allows the wrapping paper to achieve the desired opacity.

In certain embodiments of the smoking article of the present invention comprising wrapping paper, the filler in the base paper is selected from the group consisting of calcium carbonate such as precipitated calcium carbonate (PCC) or pulverized calcium carbonate (GCC), kaolin clay, talc, titanium dioxide , aluminum trihydrate and precipitated silica and silicates (PSS), or mixtures thereof.

Similar to the combustible additive, the filler is generally not limited as long as it is suitable for use in a smoking article. In certain embodiments, calcium carbonate is used.

- 4 038118

In one embodiment, the paper porosity of the base paper is 40-50 CU, for example 43-47 CU, for example 45 CU, the total amount of combustible additive is present in an amount of 0.4-0.6 wt.%, For example 0.5 wt. % based on the dry weight of the base paper, and the amount of filler in the base paper is 17-23% by weight, for example 19-21% by weight, for example 20% by weight based on the dry weight of the base paper.

In certain embodiments, the balance of up to 100% by weight, based on the dry weight of the base paper, is substantially filler and fibrous material.

In certain embodiments, the wrapper paper of the present invention, the basis weight of base paper is 20-26 g / m ^2, such as 21-24 g / m ^2, or for example 23-25 g / m ^2, for example 24 g / m ² ... By providing base paper with basis weights in these ranges, it is possible to obtain the desired opacity of the wrapping paper while controlling the CO level.

In certain embodiments of the wrapping paper of the present invention, the fibrous material is cellulosic fibrous material.

The present invention further relates to a smoking article comprising wrapping paper as in the embodiments described above, and wherein the wrapping paper surrounds a portion, roll, or column of smoking material to form a tobacco rod.

In certain embodiments of the present smoking article, when the tobacco rod is wrapped in wrapping paper, the combustion suppression regions are in the form of stripes extending in the longitudinal direction of the tobacco rod and spaced apart in the circumferential direction of the tobacco rod.

In certain embodiments of the present smoking article, when the tobacco rod is wrapped in wrapping paper, the combustion suppression regions are in the form of circular annular bands extending in the circumferential direction of the tobacco rod and spaced apart in the longitudinal direction of the tobacco rod.

The present invention relates to a wrapping paper comprising a plurality of combustion-suppressing regions that are provided at a distance from each other on one surface of the wrapping paper, the diffusion capacity of the combustion-suppressing regions and non-combustion-suppressing regions being in the range of 5 to 35 %.

Without being limited to any particular theory, the beneficial effect of the present invention, i. E. the combination of low flammability without sacrificing palatability is due to the particular ratio of the diffusion capacity of the combustion-suppressing and non-combustion-suppressing regions, which are spaced apart on the base paper, as set forth above.

The above embodiments can be arbitrarily combined as needed. Additional possible embodiments and implementations of the present invention also include combinations of features not explicitly mentioned above or below with respect to examples of the present invention. In particular, one skilled in the art will also add individual aspects as modifications or additions to the corresponding basic form of the present invention.

Examples of

The following is a detailed description of the present invention with reference to examples thereof. However, these examples are illustrative and do not limit the scope of the present invention.

Example 1.

Two cigarettes 84 mm long with increased puffs were made from the same tobacco blend. Both of these cigarettes had a 63 mm long tobacco rod attached to a 21 mm long filter with edging paper. The filters were cut from the same filter rod and the rim papers were cut from the same roll. The tobacco rod of cigarette A was wrapped in prior art wrapping paper (paper A), while cigarette B was wrapped in wrapping paper of the present invention (paper B). In both wrapping papers, the combustion-suppressing regions were annular bands 6 mm wide, spaced 18 mm apart in a design similar to that shown in FIG. 2. The technical characteristics of the respective wrapping papers are shown in table. 1 below.

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Table 1

Paper A Paper B Main weight 27 g / m ² 24 g / m ² Porosity 80 CU 45 CU Diffusion capacity in areas that suppress combustion 0.045 cm / s 0.230 cm / s Diffusion capacity in non-combustible areas (diffusion capacity of base paper) 2.3 cm / s 1.8 cm / s Combustible additive type Citrate Citrate The amount of combustible additive 1.4 wt. % 0.5 wt. % Filler (calcium carbonate) 27.7 wt. % 20.0 wt. %

These cigarettes were measured in accordance with ISO 3308: 2012 to determine their TNCO levels as well as their respective puffs. Self-extinguishing measurements were also carried out for these cigarettes both when placed on a surface (ISO 12863: 2010 referred to as LIP) and when burning in free air (ISO 12863: 2010 - referred to as FASE). The results are shown in table. 2 below. The wrapping paper B was found to increase the puffs of cigarette B by 1.3 while maintaining very similar TNCO levels. Paper B also exhibits a high self-extinguishing rate when placed on a surface and markedly improved performance when burning in free air.

To assess the effect on taste, a blind smoking test was used, which was carried out with a group of experts on smoking. The test consisted of giving one cigarette of each type to each panelist who smoked them in sequential order and then noted which tasted better. The panel concluded that cigarette B tasted better than cigarette A.

table 2

Cigarette A Cigarette B Resin 9.8 mg 10.0 mg Nicotine 0.80 mg 0.85 mg CO 9.0 mg 9.3 mg Number of puffs 6.8 8.1 LIP 100% 94% FASE thirty% eight%

Example 2.

Two 84 mm long low flammability cigarettes were made from the same tobacco blend. Both of these cigarettes had a 57 mm long tobacco rod attached to a 27 mm long filter with edging paper. The filters were cut from the same filter rod and the rim papers were cut from the same roll. The tobacco rod of cigarette C was wrapped in the prior art wrapping paper from Example 1 (paper A), while cigarette D was wrapped in the inventive wrapping paper from Example 1 (paper B).

These cigarettes were measured in accordance with ISO 3308: 2012 to determine their TNCO levels as well as their respective puffs. Self-extinguishing measurements were also carried out for these cigarettes both when placed on a surface (ISO 12863: 2010 referred to as LIP) and when burning in free air (ISO 12863: 2010 - referred to as FASE). The results are shown in table. 3 below. The wrapping paper B was found to increase the puffs of cigarette B by 0.9 while maintaining very similar TNCO levels. Paper B continues to exhibit a high self-extinguishing rate when placed on a surface and markedly improved performance when burning in free air.

As in Example 1, a blind smoking test conducted with a smoking expert panel showed that cigarette D tasted better than cigarette C.

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Cigarette WITH Cigarette D Resin 8.0 8.1 Nicotine 0.62 0.68 CO 9.1 9.2 Number puffs 5.6 6.5 LIP 98% 95% FASE 38% 23%

Table 3

Example 3.

Four 84 mm long cigarettes were made from the same tobacco blend. These cigarettes had a 63 mm long tobacco rod attached to a 21 mm long filter with edging paper. The filters were cut from the same filter rod and the rim papers were cut from the same roll. The tobacco rod of cigarette E was wrapped in wrapping paper (paper C), which did not have combustion suppressing regions, which was used as a taste reference for the wrapping papers of tobacco rods of cigarettes F, G and H (papers D, E and F, respectively), which contain areas that suppress combustion. The wrapping papers D, E, and F differ from the wrapping paper C only in the presence of combustion-suppressing regions, and differ from each other in the diffusion capacity of the combustion-suppressing regions. In wrapping papers D, E, and F, the combustion suppression regions were annular bands 6 mm wide separated by 18 mm in a construction similar to that shown in FIG. 2. The technical characteristics of the respective wrapping papers are shown in table. 4 below.

These cigarettes were measured in accordance with ISO 3308: 2012 to determine their TNCO levels as well as their respective puffs. Self-extinguishing measurements were also carried out for these cigarettes both when placed on a surface (ISO 12863: 2010 referred to as LIP) and when burning in free air (ISO 12863: 2010 - referred to as FASE). The results are shown in table. 5 below. The F wrapping paper was found to continue to exhibit a high self-extinguishing rate when placed on a surface and significantly improved free air burning performance compared to D and E wrapping papers, while maintaining very similar TNCO levels to C wrapping paper.

___________________________________________________________________ Table 4

Paper C Paper D Paper E Paper F Main weight 24 g / m ² 24 g / m ² 24 g / m ² 24 g / m ² Porosity 45 CU 45 CU 45 CU 45 CU Diffusion capacity in areas that suppress combustion Not applicable 0.04 cm / s 0.09 cm / s 0.28 cm / s Diffusion capacity in non-combustible areas (diffusion capacity of base paper) 1.67 cm / s 1.67 cm / s 1.67 cm / s 1.67 cm / s Combustible additive type Citrate Citrate Citrate Citrate The amount of combustible additive 0.5 wt. % 0.5 wt. % 0.5 wt. % 0.5 wt. % Filler (calcium carbonate) 20 weight. % 20 weight. % 20 weight. % 20 weight. %

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Cigarette E Cigarette F Cigarette G Cigarette N Resin 8.4 9.1 9.2 8.9 Nicotine 0.7 0.7 0.8 0.7 CO 8.3 10.3 10.1 9.5 LIP twenty% 100% 100% 85% FASE 0% 90% 65% ten%

Table 5

To assess the effect on taste, a blind smoking test was used, which was carried out with a panel of experts. Each examiner received three test cigarettes (E cigarette) and three test cigarettes, one for each type (F, G, H), which were grouped into pairs so that each pair contained a test cigarette and a test cigarette. The panelists smoked pairs of cigarettes in sequential order and then noted which of the test cigarettes tasted closer to the control cigarette. The smoking test concluded that cigarette H tasted closer to the control cigarette E.

Example 4.

Four 84 mm long cigarettes were made from the same tobacco blend. These cigarettes had a 63 mm long tobacco rod attached to a 21 mm long filter with edging paper. The filters were cut from the same filter rod and the rim papers were cut from the same roll. The tobacco rod of cigarette I was wrapped in wrapping paper (paper G), which did not have combustion suppressing regions, which was used as a taste reference for the wrapping papers of tobacco rods of cigarettes J, K and L (papers H, I and J, respectively), which contain areas that suppress combustion. Wrapping papers H, I, and J differ from wrapping papers G only in the presence of combustion-suppressing regions and differ from each other in the diffusion capacity of combustion-suppressing regions. In wrapping papers H, I, and J, the combustion suppression regions were annular bands 6 mm wide separated by 18 mm in a construction similar to that shown in FIG. 2. The technical characteristics of the respective wrapping papers are shown in table. 6 below.

Table 6

Paper G Paper H Paper I J paper Main weight 24 g / m ² 24 g / m ² 24 g / m ² 24 g / m ² Porosity 45 CU 45 CU 45 CU 45 CU Diffusion capacity in Not 0.04 cm / s 0.11 cm / s 0.18 cm / s areas with suppression of combustion Diffusion capacity of areas without suppression of combustion (diffusion capacity of base paper) Combustible additive type applicable 1.95 cm / s Citrate 1.95 cm / s Citrate 1.95 cm / s Citrate 1.95 cm / s Citrate The amount of combustible additive 0.5 wt. % 0.5 wt. % 0.5 wt. % 0.5 wt. % Filler (calcium carbonate) 20 weight. % 20 weight. % 20 weight. % 20 weight. %

These cigarettes were measured in accordance with ISO 3308: 2012 to determine their TNCO levels as well as their respective puffs. Self-extinguishing measurements were also carried out for these cigarettes both when placed on a surface (ISO 12863: 2010 referred to as LIP) and when burning in free air (ISO 12863: 2010 - referred to as FASE). The results are shown in table. 7 below. It was found that J wrapping paper continues to exhibit a high self-extinguishing rate when placed on a surface and significantly improved free air burning performance compared to H and I wrapping papers, while maintaining TNCO levels very similar to G wrapping paper.

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As in Example 3, blind smoking with a panel of experts indicated that cigarette L tasted closer to the control cigarette I.

Cigarette I Cigarette J Cigarette K Cigarette L Resin 8.0 9.3 9.6 8.9 Nicotine 0.7 0.8 0.7 0.7 CO 8.4 11.2 10.5 10.3 LIP twenty% 100% 100% 95% FASE 5% 95% 75% 40%

Table 7

Claims (14)

CLAIM 1. Wrapping paper for a smoking article containing a base paper, wherein the base paper contains a fibrous material, a filler material and one or more combustible additives, and a) the basis weight of the base paper is 24 g / m ² ; b) the porosity of the base paper is 15 to 45 CU; and c) the total amount of combustible additive is 0.1 to 0.5% by weight, based on the dry weight of the base paper. 2. The wrapping paper of claim 1, wherein the combustible additive is selected from the group consisting of citric acid salts, acetic acid salts, phosphoric acid salts, tartaric acid salts, nitric acid salts, or mixtures thereof. 3. The wrapping paper according to any one of the preceding claims, wherein the amount of filler is 17-28% by weight, based on the dry weight of the base paper. 4. The wrapping paper of any one of the preceding claims, wherein the filler material is selected from the group consisting of calcium carbonate, kaolin, clay, talc, titanium dioxide, alumina trihydrate, precipitated silica and silicates (PSS), or mixtures thereof. 5. Wrapping paper according to any one of the preceding claims, wherein the diffusion capacity of the base paper is 1.0-2.0 cm / s. 6. The wrapping paper according to any one of the preceding claims, which further comprises a plurality of combustion suppression regions that are spaced apart from each other. 7. The wrapping paper according to any one of the preceding claims, wherein the combustion-suppressing regions are on the surface of the base paper. 8. The wrapping paper of any one of claims 1 to 7, wherein the combustion suppressing regions are embedded in the matrix of the base paper. 9. Wrapping paper according to any one of claims 6 to 8, wherein the diffusion capacity of the combustion suppressing regions is 0.10-0.35 cm / s. 10. The wrapping paper according to any one of claims 6 to 9, wherein the ratio of the diffusion capacity of the combustion suppressing regions to the base paper is in the range of 5 to 35%. 11. Wrapping paper according to any one of claims 6 to 10, in which the areas that suppress the combustion contain at least one additive that reduces the diffusion capacity of the base paper, and these additives are selected from the group consisting of alginates, polyvinyl alcohol, polyvinyl acetates , modified and unmodified starches, cellulose derivatives, inorganic ions, natural gums, or mixtures thereof. 12. The wrapping paper according to any one of claims 6 to 11, wherein the combustion suppressing regions are in the form of stripes. 13. Wrapping paper according to any one of the preceding claims, wherein the fibrous material is cellulosic fibrous material. 14. A smoking article comprising a portion of smoking material surrounded by wrapping paper according to any one of claims 1 to 13.