KR20200086255A - Biodegradable segment of smoking articles - Google Patents

Abstract

A segment of a smoking article comprising a fibrous web material and a packaging material packaging the fibrous web material is presented, wherein the fibrous web material is respectively at least 40% pulp fiber and less than 10% by weight of the mass of the web material -Comprising a natural polymer, having a basis weight of at least 10 g/m² and a maximum of 70 g/m², a thickness of at least 25 μm and a maximum of 400 μm, wherein the web material in the segment is at least 20 cm² per cm³ volume of the segment and Segments with an area of up to 90 cm² and without packaging material have a density of at least 50 kg/m³ and up to 300 kg/m³, Z = ρ _Web + 5· ρ _Seg + 12·A The parameter Z defined by _Web satisfies the inequality 1300 ≤ Z ≤ 2800, where ρ _Web is the density of the web material (kg/m³), and ρ _Seg is The density of the segment in the absence of packaging material (kg/m³), and A _Web is the area of the web material per volume of the segment (cm²/cm³).

Description

Biodegradable segment of smoking articles

The present invention relates to a segment of a smoking article, in particular a segment for cooling or filtration of aerosols flowing in a smoking article, which segment is better biodegradable than the segments known in the prior art and has draw resistance and filtration efficiency. It provides an excellent combination of related properties.

Smoking articles are typically rod-shaped articles, which consist of at least two rod-shaped segments arranged side by side with each other. One segment contains a substance capable of forming an aerosol upon heating, and at least one additional segment serves to influence the properties of the aerosol.

The smoking article may be a filter cigarette, wherein the first segment contains an aerosol-forming material, particularly tobacco, and an additional segment is formed as a filter to serve to filter the aerosol. In this regard, aerosols are produced by the combustion of aerosol-forming materials, and the filter primarily serves to filter the aerosol and provide specific suction resistance to the filter cigarette.

However, the smoking article may also be a so-called heated tobacco product, in which the aerosol-forming material is only heated but not burned. In this regard, the number and amount of harmful substances present in the aerosol is reduced. Such smoking articles also consist of at least two, but more often, more, especially four, segments. One segment contains an aerosol-forming material, typically comprising tobacco, recycled tobacco or tobacco produced by other processes. A somewhat optional additional segment of smoking article serves to deliver the aerosol, cool the aerosol, or filter the aerosol.

The segments are usually packaged by packaging material. Very often, paper is used as packaging material.

In the following, unless explicitly stated or inferred directly from the context, “segment” should be understood to mean a segment of a smoking article that does not contain an aerosol-forming substance, but serves for example to deliver, cool or filter the aerosol. do.

From the prior art, it is known to prepare such segments from non-natural polymers, such as cellulose acetate or polylactic acid. After consumption of the smoking article, the smoking article must be disposed of properly. However, in many cases, the consumer simply throws away the consumed smoking article, and attempts to control this behavior using information or fines have been almost unsuccessful.

Since cellulose acetate and polylactic acid decompose only very slowly in the environment, there is interest in the industry to make segments of smoking articles from other materials that can better biodegrade. Moreover, for example, the EU plans regulations that significantly reduce or prohibit the use of non-natural polymers in smoking articles, and for this reason also interested in having alternative segments available for smoking articles. This is tilting.

Segments of smoking articles must meet a variety of requirements. The first requirement is that the aerosol must be filtered. Frequently, this filtration is optional, which means that certain substances are removed from the aerosol, affecting the taste of the aerosol. With regard to filtration, for example, if the segment mainly serves as filtration, the segment must not only have a particularly high filtration efficiency, but also, for example, if the segment is primarily intended to deliver or cool the aerosol, the segment It should have low filtration efficiency.

An additional requirement is that a specific suction resistance must be provided. During smoking, the consumer expects a certain resistance, i.e. a certain pressure difference, to aspirate the aerosol from the smoking article. Thus, segments for smoking articles are often designed to have a specific suction resistance.

An additional requirement is that the aerosol be cooled. Immediately after the formation of the aerosol, the aerosol has a temperature of several hundred degrees Celsius and must be cooled to a temperature acceptable to the consumer while it flows through the smoking article. According to the prior art, this is typically achieved by conducting heat from the aerosol.

Finally, an additional requirement is that sufficient mechanical stability must be provided for the smoking article. The consumer should not be able to accidentally compress the smoking article during normal consumption of the smoking article; Therefore, the segment must have a specific hardness. This is also partially achieved by the selection of suitable packaging materials.

Attempts to combine all these requirements with good biodegradability have not been successful enough to date.

Summary of the invention

The object of the present invention is to provide a segment for a smoking article, which can be better biodegradable than a segment of a conventional smoking article and is no worse in any case than the conventional segment with regard to filtration properties, cooling effect and suction resistance. will be.

This object is achieved by a segment according to claim 1 and a smoking article according to claim 21. Further advantageous embodiments are disclosed in the dependent claims.

The inventors have found that certain fibrous web materials for segments of smoking articles are suitable to at least meet the requirements related to biodegradability. Fibrous web material refers to any web-shaped material from staple fibers that can be formed to be a segment for smoking articles. Suitable fibrous web materials are especially paper or nonwoven fabrics. In the following, without exception, “web material” is understood to mean a fibrous web material for use in smoking articles.

The inventors have further found that certain combinations of properties of web materials and segments made therefrom can meet a variety of additional requirements in a particularly advantageous manner.

Specifically, a segment according to the present invention comprises a packaging material and a web material packaged by the packaging material. The web material comprises at least 40% pulp fiber and less than 10% non-natural polymer, where percentage refers to the mass of the web material. Moreover, the web material has a basis weight of at least 10 g/m² and up to 70 g/m², a thickness of at least 25 μm and up to 400 μm. In segments, the web material has an area of at least 20 cm² and up to 90 cm² per cm³ volume of the segment. Segments made from web materials have a density of at least 50 kg/m³ and up to 300 kg/m³ in the absence of packaging material. Finally, the density of the web material ( ρ _Web ) (kg/m³), the density of the segment without packaging material ( ρ _Seg ) (kg/m³), and the area of the web material per cm³ volume of the segment (A _Web ) ( In the case of cm²/cm³), the following inequality must be followed:

1300 ≤ ρ _Web + 5· ρ _Seg + 12·A _Web ≤ 2800.

According to the findings of the inventors, the suction resistance, filtration efficiency and cooling effect of the segment are determined by the structure and amount of web material in the segment. In this regard, the porous structure of the web material increases heat transfer and filtration efficiency. Apart from the structure of the web material, the amount of web material in the segment is also important. It is, on the one hand, specified by the area of the web material in the segment per volume of the segment, where the larger area per volume increases suction resistance, filtration efficiency and heat transfer, and on the other hand it depends on the density of the segment in the absence of packaging material. It is specified by, and the higher the density, the higher the suction resistance is. Particularly in the case of the cooling effect of the segment, apart from the area available for heat transfer, the density of the web material and the segment is also important because it determines the conduction of heat.

Now, the inventors, within the above-mentioned limits on the basis weight of the web material, the thickness of the web material, the density of the web material, the area of the web material per volume of the segment and the density of the segment in the absence of packaging material, the density of the web material , It has been found that a particularly good combination of properties can be achieved if the inequality described above for the parameters calculated from the density of the segment in the absence of the packaging material and the area of the web material per volume of the segment is met.

The web material in the segment of the smoking article comprises pulp fibers, where at least 40% of the mass of the web material is formed by the pulp fibers. Pulp fibers are made of natural polymers and can be significantly biodegradable, which is the first advantage of the present invention. A further advantage essential to the present invention results from the fact that the pulp fibers are hygroscopic. The aerosol in the smoking article contains water and the pulp fibers can absorb some of this water, contributing to the cooling of the aerosol. In this regard, in contrast to segments of other materials, heat is no longer transferred, but some of the water present in the aerosol is preserved along with the heat energy retained in the water. Thus, an aerosol that reaches a consumer of a smoking article reaches a consumer that has a temperature that is not necessarily significantly lower, but contains much less thermal energy and thus can be more acceptable by the consumer.

Therefore, preferably, the content of the pulp fibers in the web material is higher, preferably at least 60%, particularly preferably at least 90%, very particularly preferably at least 99%, respectively, for the mass of the web material.

The pulp fibers can be deciduous or coniferous as well as wood pulp fibers from other plants such as hemp, flax, sisal, jute, manila, or esparto grass, according to processes known in the art. Is manufactured. Mixtures of pulp fibers of various origins can also be used.

To ensure good biodegradability of the segment, the web material must contain less than 10% of its mass by non-natural polymer. Natural polymers in this regard are polymers derived directly from natural raw materials that are not chemically or compositionally modified, or polymers that are chemically identical to such polymers derived from nature. Specifically, the pulp fibers consist of natural polymer, and also fibers from recycled cellulose belonging to the natural polymer. However, in the case of cellulose acetate and polylactic acid, it does not belong to natural polymers because chemical modification has occurred, and even if the raw materials exist in nature, these raw materials are modified so that at least rapid biodegradation is no longer guaranteed. Additionally, all polymers derived from mineral oils, such as polyethylene, polypropylene, polyester or polystyrene, are non-natural polymers.

Preferably, the web material contains less than 5% of the mass of the web material, particularly preferably less than 1% of the mass of the web material. Optimal biodegradability is achieved when the web material does not contain a non-natural polymer, for this reason this is a very particularly preferred embodiment.

The web material may contain fibers from regenerated cellulose, such as viscose fiber, modal fiber, Lyocell® or Tencel®, wherein its content is preferably less than 60% of the mass of the web material , Particularly preferably less than 40% of the mass of the web material. Fibers from this amount of regenerated cellulose can be selected to further optimize filtration efficiency.

The web material can contain a filler material, wherein the filler material is preferably formed by calcium carbonate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, titanium dioxide and silicates or mixtures thereof. A particularly preferred filler material is precipitated calcium carbonate. The content of filler material is preferably at least 0%, particularly preferably at least 5%, very particularly preferably at least 10% and preferably up to 40%, particularly preferably up to 35%, relative to the mass of the web material, Very particularly preferably up to 30%. Since the filler material absorbs much less water than the pulp fibers, an increase in the content of filler material for the same basis weight of the web material can contribute to a reduction in filtration efficiency for water. In this way, it is possible to influence the cooling effect of the segment.

The web material can also be coated. In a preferred embodiment, the web material is coated with polyvinyl alcohol or polysaccharide, resulting in reduced filtration efficiency for water and less aerosol drying. In a particularly preferred embodiment, the polysaccharide is selected from the group consisting of starch, carboxymethylcellulose, guar, dextrin, pectin or mixtures thereof. It should be noted that polyvinyl alcohol is not a natural polymer and the amount of non-natural polymer does not exceed 10% of the mass of the web material.

Web materials can also be impregnated. In contrast to coatings, in the case of impregnation, the applied composition not only remains on the surface but essentially penetrates into the structure of the web material. In a preferred embodiment, the web material is impregnated with glycerol or propylene glycol. Such materials, often acting as wetting agents in the aerosol-forming materials of smoking articles, can increase filtration efficiency for glycerol to enhance the formation of aerosols.

The web material may also contain flavoring agents to control the taste of the aerosol. Flavoring agents may be contained in the web material in a chemically bound or physically bound form, such as encapsulated. Preferably, the flavoring agent is selected from the group consisting of menthol, ethyl vanillin glucoside, vanillin and ethyl vanillin.

The skilled person can, depending on his experience, select additional components of the web material, such as sizing agents such as AKD, ASA or resins or additional additives and process aids, where the amount of non-natural polymer is the mass of the web material. It should be noted that it should be less than 10%.

The basis weight of the web material is 10 g/m² to 70 g/m², preferably 20 g/m² to 60 g/m², particularly preferably 25 g/m² to 50 g/m². The basis weight can be determined according to ISO 536:2012. The choice of basis weight affects the workability of the web material, in particular the amount of material for crimping or folding processes and segments. By the preferred range, the amount of material is particularly significantly combined with the resulting segment properties.

The thickness of the web material is 25 μm to 400 μm, preferably 35 μm to 150 μm, particularly preferably 40 μm to 100 μm. As with the basis weight, the thickness of the web material is important for processability, and in the case of the desired properties of the segment, a thickness that is particularly suitable for crimping or folding results in a desirable range. The thickness can be determined according to ISO 534:2011.

The basis weight and thickness together, through density, affect the properties of the segments made from the web material. The density of the web material is preferably 100 kg/m³ to 1200 kg/m³, particularly preferably 200 kg/m³ to 700 kg/m³, very particularly preferably 300 kg/m³ to 600 kg/m³. Density represents the porous structure of the web material, and thus is an essential quantity for filtration efficiency, heat transfer and suction resistance. The preferred range allows a good combination of suction resistance and filtration efficiency. Density can be determined according to ISO 534:2011.

The segments are, for each segment volume, from 20 cm² to 90 cm² of web material per cm³ volume of the segment, preferably from 30 cm²/cm³ to 80 cm²/cm³, particularly preferably from 35 cm²/cm³ to 70 cm²/cm³ Includes web materials. The area of the web material per volume of the segment indicates how densely the web material is packed into the segment. Thus it affects not only the suction resistance of the segment, but also the filtration properties, heat transfer and hardness. The area of the web material can be determined, for example, by weighing the web material and calculating from the nominal or measured basis weight of the web material.

The density of the segment itself in the absence of packaging material is 50 kg/m³ to 300 kg/m³, preferably 60 kg/m³ to 250 kg/m³, particularly preferably 70 kg/m³ to 200 kg/m³. These parameters also have an intrinsic effect on the aspiration resistance, filtration efficiency and hardness of the segment. The density of the segments is indicated as the absence of packaging material, since packaging materials have little effect on suction resistance, filtration efficiency or heat transfer. Determination of the density of the segments can be made by calculation. In this regard, first, the volume of the segment is determined, and the volume can be calculated, for example, from the diameter and length of the cylindrical segment. The influence of the packaging material on the diameter can be neglected. The mass of the segment can be determined by weighing, where the segment is packaged by packaging material. The mass of the packaging material can be determined from the area of the packaging material and the nominal or measured basis weight of the packaging material. For example, in the case of a typical cylindrical segment, the area of the packaging material results from the length of the segment as well as the circumference of the segment and the overlap between the packaging material itself.

The density is calculated by subtracting the mass of the packaging material from the mass of the segment in the presence of the packaging material and dividing by the volume of the segment. Numerical examples are described in more detail below.

Since the density of the web material, the density of the segment in the absence of packaging material and the area of the web material in the segment per volume of the segment all interact in a complex way by affecting the segment's suction resistance, filtration efficiency and heat transfer. The inventors have found that only certain combinations of these properties can adequately meet the requirements for the segment. It has been found that the parameter Z calculated from this property is related to it, which is calculated by:

Z = ρ _Web + 5· ρ _Seg + 12·A _Web ,

In the above formula,

ρ _Web is the density of the web material (kg/m³),

ρ _Seg is the density of the segment in the absence of packaging material (kg/m³),

A _Web is the area of web material (cm²/cm³) per segment volume.

This parameter Z should be at least 1300 and up to 2800, preferably at least 1350 and up to 2600, particularly preferably at least 1400 and up to 2400. Segments with advantageous properties are obtained only in this way, and a particularly advantageous compromise between the suction resistance obtained and the filtration efficiency is only made within the above preferred range.

The packaging material of the segment is preferably paper, particularly preferably paper having a basis weight of at least 20 g/m² and up to 150 g/m², particularly preferably at least 50 g/m² and up to 120 g/m² basis weight. It is paper to have. In order to obtain advantageous properties for the segment, the density of the segment and thus the hardness is relatively low. Therefore, a packaging material having a basis weight of 50 g/m² to 150 g/m² can further improve the hardness of the segment. However, the basis weight should not be too high, because otherwise the resilience of the packaging material makes it more difficult to manufacture segments, especially the adhesion between the packaging materials themselves.

The flexural stiffness of the packaging material can be equally as important as the basis weight to obtain the advantageous hardness of the segment. Therefore, the bending stiffness should preferably be at least 0.05 Nmm and up to 0.90 Nmm, particularly preferably at least 0.10 Nmm and up to 0.80 Nmm. Flexural stiffness can be determined according to ISO 5628:2012, in particular according to the two-point method described in these standards. Flexural stiffness can vary depending on the direction the sample is taken from the web material. The features defined by the above-mentioned preferred and particularly preferred ranges are obtained when the bending stiffness in at least one direction is in the prescribed or particularly preferred ranges specified.

The segments according to the invention are preferably cylindrical and preferably have a diameter of at least 5 mm and up to 9 mm, particularly preferably at least 7 mm and up to 8.5 mm.

The segments according to the invention preferably have a length of at least 4 mm and up to 40 mm, particularly preferably at least 6 mm and up to 35 mm, very particularly preferably at least 10 mm and up to 28 mm.

Since the segment according to the invention can be a component of a smoking article, the smoking article according to the invention comprises an aerosol-forming material and a segment according to the invention.

In a preferred embodiment, the smoking article is a filter cigarette comprising at least one segment according to the invention and an additional segment containing tobacco. In a particularly preferred embodiment, the segment according to the invention is a segment of the filter of the filter cigarette.

In a further preferred embodiment, the smoking article is a smoking article that contains an aerosol-forming material which is only heated during the intended use of the smoking article but does not burn and which contains at least one segment and filter segment according to the invention. , Wherein at least one segment according to the invention is disposed between the aerosol-forming material and the filter segment. In this arrangement, at least one segment according to the invention mainly serves to cool the aerosol.

Segments according to the invention can be prepared according to processes known in the art. This process typically involves crimping or folding the web material, making a continuous bar from the web material, wrapping the continuous bar with packaging material, and cutting the wrapped bar into segments of a desired size.

Smoking articles using segments according to the invention can also be made according to processes in the art.

1 shows a table (Table 1) summarizing the composition of 25 web materials.
FIG. 2 shows a table (Table 2) summarizing the characteristic properties (width, basis weight, thickness, density) of the web material of the 25 web materials in Table 1.
FIG. 3 shows a table (Table 3) summarizing the characteristic properties (mass, density, area, parameter Z) of 25 segments prepared from the web materials of Tables 1 and 2.
FIG. 4 shows a table (Table 4) summarizing the functional properties of the segments in Table 3 (aspiration resistance, filtration efficiency for nicotine, water and glycerol).

The invention will now be described more accurately through some embodiments according to the invention and will be compared to examples not according to the invention.

Various fibrous web materials were prepared according to processes known in the art, and reels having a width of 175 mm to 315 mm were cut. The reels of web material were crimped and reels of each continuous bar were prepared and packaged in packaging material having a basis weight of 78 g/m². The rod with the packaging material had a diameter of 7.85 mm, where the packaging material had a width of 27 mm and overlapped by about 2.3 mm to adhere to itself.

The composition of the web material is provided in Table 1. All web materials were made from wood pulp; In the case of the two web materials 22 and 23, lyocell® fiber was also used, where the percentage of 40% indicated is related to the mass of lyocell® fiber relative to the total fiber mass in the web material. Web materials 4-6, 12 and 13 also contained 29.5% precipitated calcium carbonate (CaCO ₃ ) by mass.

Web materials 16-21, 24 and 25 were coated with oxidized starch and web materials 14, 15, 18 and 19 were impregnated with glycerol. Web materials 20 and 21 were impregnated with propylene glycol.

The basis weight of the web material was determined according to ISO 536:2012 and the thickness and density were determined according to ISO 534:2011. Results are provided in Table 2, where the number of web materials corresponds to that in Table 1.

The rods made from the web material were cut to obtain rods each having a length of 108 mm, and their mass was determined by weighing.

Data for rods made from web materials 1-25 are provided in Table 3, where again the number of web materials corresponds to that in Table 1. The mass in Table 3 in this regard is the mass of a 108 mm long rod with packaging material having a basis weight of 78 g/m². The density was calculated as follows from the mass of the rod and the known geometry.

The mass of the packaging material 27 mm wide and 108 mm long was as follows:

78 g/m² × 0.027 m × 0.108 m = 0.227 g.

The volume of the rod was calculated from the known geometry, and thus was as follows:

π/4 × (7.85 mm)² × 108 mm = 5227 mm³.

In this regard, the thickness of the packaging material was neglected. The mass of the packaging material is subtracted from the mass of the rod in the presence of the packaging material and the result is divided by the volume. Thus, for example, the density of rods made from web material 1 was as follows:

(0.71 g-0.227 g)/5227 mm³ = 92.4 kg/m³.

The parameter Z is also shown in Table 3, which is calculated from:

Z = ρ _Web + 5· ρ _Seg + 12·A _Web ,

In the above formula,

ρ _Web is the density of the web material (kg/m³),

ρ _Seg is the density of the segment in the absence of packaging material (kg/m³),

A _Web is the area of web material (cm²/cm³) per segment volume.

The parameter Z is independent of the geometry of the rod or segment, especially the diameter and length, and only characterizes the internal structure of the segment.

The suction resistance of the 108 mm long rod was measured according to ISO 6565. A segment with a length of 18 mm was cut from the rod, from which a smoking article was prepared.

Smoking articles were so-called heated tobacco products, in which the tobacco contained in the smoking article was only heated. The smoking article comprises a segment comprising the tobacco and a delivery segment in which the aerosol can be condensed, followed by a flow direction, and a further subsequent segment according to the invention which serves primarily to cool the aerosol, and finally the filter segment. Is made of

The smoking article was heated in a commercially available heating device and smoked according to the method given in ISO 3308. For segments prepared from web materials 8-25, filtration efficiency for nicotine, water and glycerol was measured. In this regard, filtration efficiency is the difference between the amount of material flowing into the segment and the amount of material flowing out of the segment, relative to the amount of material flowing into the segment. Filtration efficiency is expressed as a percentage and was determined by this method for 18 mm long segments for nicotine, water and glycerol.

Table 4 shows the suction resistance of the 108 mm long rod and the filtration efficiency of the 18 mm long segment for nicotine, water and glycerol. Here too, the number of web materials corresponds to that in Table 1.

Segments made from web materials 1-25 are segments according to the invention, which segment has a parameter Z from about 1300 to about 2250. The 108 mm long bar has a suction resistance of 17.9 mmWG to 63.9 mmWG, allowing the design of segments that deliver aerosols and only filter segments with low aspiration resistance or aerosols and additionally increase suction resistance . In particular, as a result of comparing the same web materials 2 and 11 in composition, the effect of the density of the segment on the suction resistance can be seen. A segment from web material 2 with a segment density of 73.3 kg/m³ provided a suction resistance of 23.8 mmWG (108 mm), whereas a segment made from web material 11 with a density of 170.5 kg/m³, 54.5 It has a suction resistance (108 mm) of mmWG. This shows the importance of segment density, for this reason it is an essential component of parameter Z. However, suction resistance is not only determined by the density of the segments.

Web materials 6 and 7 have similar basis weights, but web material 6 contains 29.5% calcium carbonate and thus has a much higher density. The segments produced therefrom have similar densities and the area of web material per volume of the segment is similar. Nevertheless, they are very different in suction resistance, which is 63.9 mmWG for rods made from web material 6 (108 mm) and 30.5 for rods made from web material 7 (108 mm). mmWG. It can thus be seen that the density of the web material itself has an independent effect on the properties of the segments produced therefrom and thus also constitutes an essential component of the parameter Z.

The area of the web material per volume of the segment depends on the density of the web material and the density of the segment in the absence of the packaging material, and therefore is also an essential property of aspiration resistance and therefore also a component of parameter Z.

Segments of web materials 16-21 coated with starch all show lower filtration efficiency for water than segments from comparable web materials 8, 9 and 11, while it is almost in filtration efficiency for nicotine and glycerol. It is not different. It can thus be seen that the oxidized starch coating can be used to control the filtration efficiency for water.

Impregnation of web materials 18-21 with glycerol or propylene glycol results in much higher filtration efficiencies for nicotine and glycerol, compared to segments from web materials 16 and 17 that did not undergo such impregnation, for segments prepared therefrom do. Thus, the filtration efficiency for nicotine and glycerol can be controlled by impregnation.

In summary, all segments made from web materials 1-25 are useful as segments of smoking articles and can serve to cool aerosols as well as to filter aerosols. The biodegradability of all segments prepared from web materials 1-25 resulted directly from the components used and was no longer tested. It has been found that the use of the segments according to the invention allows properties favorable for use in smoking articles to be obtained and additionally excellent biodegradability can be achieved.

Looking at the following two embodiments, which do not conform to the present invention, it can be seen that the parameter Z is essential for distinguishing between segments according to the invention and segments not according to the invention.

A segment with a density of 90.4 kg/m³ in the absence of packaging material and an area of web material per volume of the segment of 36.9 cm²/cm³ was prepared from web material 7. The parameter Z for this segment was as follows,

350.0 + 5 90.4 + 12 36.9 = 1244.8

Therefore, it is outside the range of 1300 to 2800, according to the present invention.

A 108 mm long rod made from this web material had a suction resistance of only 12.3 mmWG, which was too low to be applied to smoking articles. In addition, despite the packaging material of 78 g/m², the hardness of the segment is not sufficient to be further processed into smoking articles. It should be noted that this segment fulfilled all the requirements according to the invention except for those related to parameter Z.

A segment was prepared from web material 12 with a density of 233.9 kg/m² without packaging material and an area of web material per volume of segment of 89.9 cm²/cm³. The parameter Z for this segment was as follows,

604.7 + 5 · 233.9 + 12 · 89.9 = 2853.6

Therefore, it is outside the range of 1300 to 2800, according to the present invention.

Despite the high content of calcium carbonate in web material 12, the filtration efficiency of this segment for water was greater than 65%, thus producing an aerosol that was too dry and thus resulted in an unacceptable taste by the consumer. Once again, it should be noted that this segment fulfilled all the requirements according to the invention except for those related to parameter Z.

Thus, looking at two comparative examples not according to the invention, the parameters It can be seen that Z is essential for obtaining segments with satisfactory properties.

Claims (23)

Is a segment of smoking articles,
A fibrous web material and a packaging material for packaging the fibrous web material,
The fibrous web material
-Each containing at least 40% pulp fiber and less than 10% non-natural polymer for the mass of the web material,
-Have a basis weight of at least 10 g/m² and a maximum of 70 g/m²,
-Has a thickness of at least 25 μm and up to 400 μm,
The web material in the segment has an area of at least 20 cm² and up to 90 cm² per cm³ volume of the segment,
The segment has a density of at least 50 kg/m³ and up to 300 kg/m³ in the absence of packaging material,
Z = ρ _Web + 5· ρ _Seg + 12·A Parameters specified by _Web Z satisfies the inequality 1300 ≤ Z ≤ 2800, where:
ρ _Web is the density of the web material (kg/m³),
ρ _Seg is the density of the segment in the absence of packaging material (kg/m³),
A _Web is the segment, which is the area of web material (cm²/cm³) per segment volume. The segment of claim 1, wherein the content of pulp fibers in the web material is each at least 60%, preferably at least 90%, particularly preferably at least 99%, relative to the mass of the web material. The pulp fibers according to claim 1, wherein the pulp fibers are from deciduous or coniferous trees, from other plants, in particular from wood hemp fibers derived from hemp, flax, sisal, jute, manila hemp or espartograss or mixtures thereof. Formed by segments. 4. The web material according to claim 1, wherein the web material contains less than 5% non-natural polymer of its mass, preferably less than 1% non-natural polymer of its mass. And, particularly preferably free of non-natural polymers. The web material according to claim 1, wherein the web material contains fibers from regenerated cellulose, in particular viscose fiber, modal fiber, lyocell® or tencel®, the content of which is preferably of the web material. A segment that is less than 60% of the mass, particularly preferably less than 40% of the mass of the web material. 6. The web material according to claim 1, wherein the web material contains a filler material, the filler material preferably being calcium carbonate, in particular precipitated calcium carbonate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, titanium dioxide, silicates. Or segment, formed by a mixture thereof. 7. The content of the filler material according to claim 1, wherein the content of filler material relative to the mass of the web material is at least 0%, preferably at least 5%, particularly preferably at least 10%, and up to 50%, preferably. A segment, preferably up to 35%, particularly preferably up to 30%. 8. The web material according to claim 1, wherein the web material is particularly coated with polyvinyl alcohol or polysaccharide, and the polysaccharide is preferably starch, carboxymethylcellulose, guar, dextrin, pectin or its A segment, selected from the group consisting of mixtures. The segment according to claim 1, wherein the web material is particularly impregnated with glycerol or propylene glycol. The web material according to any one of claims 1 to 9, wherein the web material contains a flavoring agent, preferably the flavoring agent is a web material in a chemically bound or physically bound form, for example in encapsulated form. Segment, wherein the flavoring agent is preferably selected from the group consisting of menthol, ethyl vanillin glucoside, vanillin and ethyl vanillin. The segment according to claim 1, wherein the basis weight of the web material is between 20 g/m² and 60 g/m², preferably between 25 g/m² and 50 g/m². The segment according to claim 1, wherein the web material has a thickness of 35 μm to 150 μm, preferably 40 μm to 100 μm. The web material according to any one of claims 1 to 12, wherein the web material has a density of 100 kg/m³ to 1200 kg/m³, preferably 200 kg/m² to 700 kg/m³, particularly preferably 300 kg/m³. Segment, which is between 600 kg/m³. The segment according to any of the preceding claims, containing a web material of 30 cm²/cm³ to 80 cm²/cm³, preferably 35 cm²/cm³ to 70 cm²/cm³ per cm³ volume of the segment. 15. A segment according to any one of the preceding claims, having a density of 60 kg/m³ to 250 kg/m³, preferably 70 kg/m³ to 200 kg/m³ in the absence of packaging material. 16. A segment according to any of the preceding claims, wherein the parameter Z is at least 1350 and up to 2600, preferably at least 1400 and up to 2400. The packaging material according to claim 1, wherein the packaging material is preferably at least 20 g/m² and a basis weight of up to 150 g/m², particularly preferably at least 50 g/m² and up to 120 g/m². A segment, formed by paper having a basis weight. 18. A segment according to any of the preceding claims, wherein the packaging material has a bending stiffness of at least 0.05 Nmm and up to 0.90 Nmm, preferably at least 0.10 Nmm and up to 0.80 Nmm. The segment according to any of the preceding claims, wherein the segment is cylindrical and preferably has a diameter of at least 5 mm and up to 9 mm, particularly preferably at least 7 mm and up to 8.5 mm. The segment according to claim 1, wherein the segment has a length of at least 4 mm and a maximum of 40 mm, preferably a length of at least 6 mm and a maximum of 35 mm, particularly preferably at least 10 mm. And a length of up to 28 mm. A smoking article, comprising a segment according to any one of claims 1 to 20 and an aerosol-forming material. 22. A smoking article according to claim 21, wherein the aerosol-forming material is a cigarette, the smoking article is a filter cigarette, and the segment preferably forms a filter or part thereof. The aerosol-forming material according to claim 21, wherein during the intended use, the aerosol-forming material is only heated but does not burn, the smoking article additionally contains a filter segment, the segment being arranged between the aerosol-forming material and the filter segment, Smoking goods.

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