Coated paper with a use indicator for aerosol products - Patent application

Abstract

The present invention relates to a coated paper for an aerosol product, which contains cellulose fibers and is coated with a composition containing a substance that promotes thermal destruction of cellulose and a binder. 3 / (cm 2 ·min·kPa) or more, the composition is only applied to a few areas that cover at least 0.5% and at most 70% of the area of ​​the coated paper.

Description

[Technical Field]

[0001] The present invention relates to an aerosol product in which an aerosol-generating material is heated, thereby releasing an aerosol, but the aerosol-generating material is not combusted. The aerosol product comprises a wrapper in which a substance is applied to the entire surface or a section of the surface, causing a change in the optical properties of the wrapper, thereby indicating that the aerosol product has been used. In particular, the wrapper of the aerosol product according to the present invention is designed so that, upon heating, its color irreversibly changes at least in a section of the surface, and particular attention is paid to the fact that the breathability of the wrapper is not significantly affected. The present invention also relates to a process for producing such a wrapper. [Background technology]

[0002] In the prior art, aerosol-producing articles are known that include an aerosol-generating material and paper, which is wrapped around the aerosol-generating material to form a rod that is typically cylindrical. In this regard, the aerosol-generating material is a material that releases an aerosol when heated, and the aerosol-generating material is only heated and not burned. In many cases, the aerosol-producing article also includes a filter that can filter components of the aerosol and is wrapped in a filter wrapper and a further wrapper that connects the filter to the rod wrapped in the aerosol-generating material.

[0003] During the intended use of an aerosol product, the aerosol-generating material is typically only heated, not combusted. This heating can be achieved, for example, by an external device into which the aerosol product is inserted, or by a heat source applied to one end of the aerosol product that is operated to consume the item, for example, by ignition. Often, several aerosol products are present in a single pack, and after use, the used aerosol product is often returned to the pack along with any unused aerosol products. However, because the aerosol-generating material is only heated, not combusted, the used aerosol product is optically indistinguishable from the unused aerosol product, or is only slightly optically distinguishable. In either case, the consumer cannot quickly determine which aerosol product has been used and which is still unused. Summary of the Invention [Means for solving the problem]

[0004] An object of the present invention is to provide a wrapper for an aerosol product that irreversibly changes optically during or immediately after use of the aerosol product, so that the aerosol product can be easily identified as having been used. In the context of the present invention, an aerosol product is a rod-shaped article that includes an aerosol-forming material and a wrapper that encases the aerosol-forming material, and during intended use, the aerosol-forming material is only heated, not combusted. Heating without combustion occurs for typical aerosol-forming materials, in any case where the aerosol-forming material is heated to a temperature of at most 400°C.

[0005] This object is achieved by a wrapper for an aerosol product according to claim 1, an aerosol product comprising this wrapper according to claim 19, and a process for producing the wrapper according to the invention according to claim 21. Advantageous embodiments are provided in the dependent claims.

[0006] The inventors have found that this can be achieved by a wrapper in which a specific composition is applied to the entire surface or to sections, and which, when heated, induces an irreversible color change in the wrapper by promoting the thermal decomposition of the cellulose, allowing used aerosol product items to be distinguished from unused ones by simple inspection.

[0007] It should be noted that thermochromic inks are known in the prior art that exhibit a color change when heated above a certain temperature, but are not intended for use in the present invention. One reason for this is that the color change of thermochromic inks is often reversible and therefore disappears again during the cooling of the aerosol product. In contrast, the decomposition of cellulose on the wrapping paper according to the present invention is practically irreversible, thus enabling reliable recognition of used aerosol products even some time after their use. Furthermore, the temperature at which the color change occurs for known thermochromic inks is relatively low, so that storing unused aerosol products at high temperatures, for example, in a parked car during the summer, can also cause a color change, potentially leading to the misidentification of unused products with used ones. Furthermore, temperatures of up to 400°C can be reached during heating of aerosol products for several minutes, at which temperatures the thermochromic inks may already be partially thermally decomposed, resulting in their loss of functionality.

[0008] Additionally, depending on the structure of the aerosol-producing article, air should be able to flow through the wrapper to the aerosol-generating material during use. However, because thermochromic inks applied to the wrapper can significantly reduce the breathability of the wrapper, insufficient amounts of such inks are often applied to the wrapper to avoid affecting the functionality of the article.

[0009] Finally, the materials that can be used in wrappings for aerosol products are substantially restricted by law in many countries, and as a result the use of thermochromic inks is often not permitted, even if it could be used from a technical point of view.

[0010] In contrast to the known behavior of thermochromic inks, a particular inventive advantage of the present invention is that the applied substance itself does not change its color, but rather causes a color change in the cellulose in the wrapper.

[0011] The wrapper paper must contain pulp fibers present in the wrapper paper in an amount of at least 50% by weight of the wrapper paper, at least the amount of pulp fibers necessary to produce a clearly visible color change.

[0012] The wrapping paper must be at least 0cm 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 The average air permeability (mbar) is measured in accordance with ISO 2965:2009 using a measuring head with an opening area of ​​2 mm x 15 mm, and the average air permeability is determined from measurements at 10 randomly selected positions on the wrapper.

[0013] The composition applied to the wrapping paper should contain at least one substance that promotes the thermal decomposition of cellulose to cause a color change, and a binder that fixes the substance on or in the paper. In this regard, the substance that promotes the thermal decomposition of cellulose is suitable to cause an irreversible color change in the wrapping paper that is perceptible to the naked eye due to the thermal decomposition of cellulose in the paper when the wrapping paper is heated to a temperature of at least 130°C for 5 minutes.

[0014] 10cm of wrapping paper 3 / (cm 2 When the permeability exceeds 100 psi (100 psi), it is important that air can flow uniformly through the wrapper and over the surface to avoid larger areas of lower permeability that may result from application of the composition.

[0015] According to the present invention, sufficient breathability is ensured by applying the composition only to a section of the wrapper, this section covering at least 0.5% and at most 70% of the surface of the wrapper, which means that the extent of the total area over which breathability is affected is limited, but also ensures that the area is large enough so that the color change is easily perceptible.

[0016] In addition, the uniformity of breathability is ensured in accordance with the present invention in that the sections are shaped and positioned on the wrapper in a suitable manner, and suitable shape or positioning is determined for the purposes of the present invention by two criteria, at least one of which must be met. The first criterion requires that the average breathability of the wrapper be at least 10 cm 3 / (cm 2 ·min·kPa) and at most 20 cm 3 / (cm 2 ·min·kPa), the standard deviation of the air permeability is at most 6 cm 3 / (cm 2 ·min·kPa) is sufficient, and the average air permeability of the wrapping paper is at least 20cm 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 ·min·kPa), the coefficient of variation of the air permeability may be at most 30%.

[0017] To determine the standard deviation and coefficient of variation of the air permeability, a measuring head with an opening of 2 mm x 15 mm was used. The standard deviation and coefficient of variation were determined from 10 non-overlapping sections located closely to each other. The determination of the mean and standard deviation required approximately 300 mm. 2 The area of ​​the sample is used. The coefficient of variation is the quotient of the standard deviation and the mean, expressed as a percentage. The mean used in this calculation is generally not the same as the mean air permeability, as previously described, determined from measurements at 10 randomly selected locations.

[0018] As an alternative to or as a complement to the specification of the dispersion parameter of the breathability, according to the second criterion, at least 10 cm 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 It is sufficient that the sections to which the composition is applied to the wrapper are shaped so that each imaginary circle of diameter D mm on the wrapper contains at least one area to which the composition is not applied, with an average air permeability of (min kPa), and the diameter of circle D in mm is

number

[0019] The effect of this formula is low average air permeability, e.g. 10cm 3 / (cm 2 At low permeability (e.g., 200 cm), the circle can have a relatively large diameter of 12 mm, and the section can therefore contain a coarser structure. This is possible because at low permeability, the influence of the section to which the material is applied is less significant. At high permeability, e.g., 200 cm 3 / (cm 2 At a pressure of 0.1·min·kPa, the circle only needs to have a relatively small diameter of 6 mm, and therefore the sections need to have a finer structure so that the air can flow evenly over the surface of the wrapper.

[0020] In summary, we: - containing pulp fibres, at least 50% of the mass of the wrapping paper being formed by pulp fibres, -At least 0cm when measured with a 2mm x 15mm measuring head according to ISO 2965:2009 at 10 randomly selected positions 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm2 ·min·kPa) average breathability, a composition comprising a substance that promotes the thermal decomposition of cellulose and a binder is applied, Invented a wrapper for aerosol products, -The average permeability of the wrapping paper is 10cm 3 / (cm 2 ·min·kPa) or more, the composition is applied only to a section covering at least 0.5% and at most 70% of the surface of the wrapper, In this case, the average air permeability of the wrapping paper must be at least 10 cm 3 / (cm 2 ·min·kPa), the section is placed on the wrapper so that at least one of the following two criteria (1) and (2) is met: (1) The average air permeability of the wrapping paper is at least 10 cm 3 / (cm 2 ·min·kPa) and at most 20 cm 3 / (cm 2 ·min·kPa), the standard deviation of the air permeability is at most 6 cm 3 / (cm 2 ·min·kPa) and the average air permeability of the wrapping paper is at least 20cm 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 ·min·kPa), the coefficient of variation is at most 30%, or (2) The section to which the composition is applied is shaped so that each imaginary circle of diameter D mm on the wrapper contains at least one area to which the composition is not applied, and the diameter D in mm is:

number

[0021] In this context, the average breathability is determined as the average value of 10 measurements at randomly selected locations on the wrapping paper. Each measurement is performed using a measuring head with an opening of 2 mm x 15 mm in accordance with ISO 2965:2009. Therefore, during the measurement, it should be ignored that the opening can typically include both areas where the composition is applied and areas where it is not applied.

[0022] For the determination of the standard deviation and coefficient of variation of the air permeability, 10 measurements according to ISO 2965:2009 were also carried out using a measuring head with an opening of 2 mm x 15 mm, and the measurements were taken over a distance of approximately 300 mm for the determination of the mean value and standard deviation. 2 The measurement is carried out on non-overlapping sections located close to each other so that the area of ​​the area is used. The coefficient of variation is then the quotient of the standard deviation and the mean value of the measurements so determined, expressed as a percentage. Preferably, the individual measurement sections are placed immediately adjacent to each other with their long sides, i.e., the 15 mm long sides, parallel to each other with a small distance between them, preferably at most 2 mm.

[0023] A typical wrapper for an aerosol product not in accordance with the present invention, which has a naturally uniform breathability across its entire surface, has a coefficient of variation determined in this manner of at most 15%. On the other hand, wrappers to which the composition is applied in larger sections can achieve a coefficient of variation in breathability of 50% to 80%. This is particularly true when the composition is film-forming and therefore seals holes in the wrapper, or when the composition is applied in a strip several millimeters wide.

[0024] The wrapping paper preferably has a weight of at least 15 g / m 2 , particularly preferably at least 18 g / m 2 , more particularly preferably at least 20 g / m 2 Such a basis weight provides the wrapper with advantageous tensile strength for further processing the wrapper into an aerosol product article.

[0025] The wrapping paper preferably has a weight of at most 100 g / m 2 , particularly preferably at most 60 g / m 2 , especially at most 45 g / m 2 Preferably, the basis weight is not so high that the resilience makes packaging of the aerosol-forming material difficult during manufacture of the aerosol product article.

[0026] The basis weight of the wrapper, including the applied composition, can be determined in accordance with ISO 536:2012.

[0027] The wrapping paper contains pulp fibers, and the pulp fibers constitute at least 50% by weight of the wrapping paper, preferably at least 60% by weight of the wrapping paper, and particularly preferably at least 65% by weight of the wrapping paper. The pulp fibers are required to have a color change that makes it easy to optically perceive the effect of the substance that promotes the thermal decomposition of cellulose.

[0028] The pulp fibers are sourced from one or more plants selected from the group consisting of conifers, deciduous trees, spruce, pine, fir, beech, birch, eucalyptus, flax, hemp, jute, ramie, abaca, sisal, kenaf, and cotton. All or a portion of the pulp fibers may also be fibers from regenerated cellulose, such as Tencel™ fibers, Lyocell™ fibers, viscose fibers, or Modal™ fibers.

[0029] Preferably, the pulp fibers are at least partially bleached, since the white color of bleached pulp fibers makes color changes more easily perceptible. Typically, the proportion of unbleached pulp fibers, which have a light to dark brown color, should preferably be at most 50% of the pulp fiber mass.

[0030] The wrapper according to the present invention can also contain one or more fillers. The total amount of fillers is preferably at most 40%, particularly preferably at least 10% and at most 38%, and in particular at least 20% and at most 35% of the mass of the wrapper. The proportion of fillers can favorably affect the breathability, color, and opacity of the wrapper, so that the color change of the aerosol product produced from the wrapper upon heating is easily noticeable.

[0031] The one or more fillers are preferably white, water-insoluble particles, and may particularly preferably be selected from the group consisting of calcium carbonate, magnesium carbonate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, talc, kaolin, and titanium dioxide.

[0032] The wrapper paper may contain additional substances that are necessary for the manufacture of the wrapper paper or that impart additional special properties to the wrapper paper. Examples of such substances are pigments, colorants, sizing agents, starches, retention aids, or processing aids, and can be selected by a person skilled in the art in terms of type and amount according to the experience of the person skilled in the art.

[0033] Outside the section where the composition has been applied, the wrapper preferably does not contain any substances that promote cellulose degradation, or contains only an amount that does not exceed 0.5% of the wrapper's mass per unit area, particularly preferably 0.25% of the wrapper's mass, and in particular 0.1% of the wrapper's mass. A high proportion of these substances makes it more difficult to detect a color change in the wrapper compared to the section where the composition has been applied.

[0034] A composition containing a binder and a substance that promotes the thermal decomposition of cellulose is applied to the entire surface or to a section of the wrapper paper.

[0035] The amount of binder applied to a section of the wrapper should be fairly small, since binders reduce breathability and increase the coefficient of variation of breathability. The amount of binder applied to a section is preferably at most 15%, particularly preferably at most 10%, and in particular at most 5% of the mass of the wrapper per unit area.

[0036] The binder is preferably selected from the group consisting of starch, starch derivatives, cellulose derivatives, carboxymethylcellulose, alginate, pectin, polyvinyl alcohol, guar, gum arabic, or mixtures thereof.

[0037] The substance that promotes the thermal decomposition of cellulose is preferably present in an amount of at least 0.2 g / m2 on the area of ​​the wrapping paper to which the composition containing it is applied. 2 and at most 8.0 g / m 2 , particularly preferably at least 0.3 g / m 2 and at most 7.0 g / m 2 , more particularly preferably at least 0.5 g / m 2 and at most 5.0 g / m 2 The amount of substance that accelerates the thermal decomposition of cellulose is selected herein so that the color change is particularly easily perceptible, even in poor lighting conditions, in particular with the naked eye.

[0038] Alternatively, and preferably, the amount of applied material that promotes the thermal decomposition of cellulose can be characterized in terms of a quantitative ratio to the amount of pulp fiber contained in the wrapper. This quantitative ratio is important because, according to the present invention, the material must act on the pulp fiber. The quantitative ratio is expressed as g / m2 relative to the area to which the composition containing the material is applied. 2 The amount of the substance in g / m2 of the packaging 2 The quantitative ratio to the amount of unit pulp fiber is preferably at least 0.05 and at most 0.45, particularly preferably at least 0.06 and at most 0.30, in particular at least 0.07 and at most 0.25. The most advantageous ratio in each case depends on the specific substance that promotes the pyrolysis of cellulose.

[0039] The substance that promotes the thermal decomposition of cellulose is preferably one or more chemical compounds selected from the group consisting of citrate, malate, tartrate, acetate, nitrate, succinate, fumarate, gluconate, glycolate, lactate, oxylate, salicylate, α-hydroxycaprylate, bicarbonate, carbonate, chloride, polyphosphate, phosphonate, and phosphate, and particularly preferably one or more chemical compounds selected from the group consisting of trisodium citrate, tripotassium citrate, monoammonium phosphate, sodium acetate, potassium acetate, sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, sodium tartrate, potassium sodium tartrate, potassium formate, sodium formate, sodium nitrate, and potassium nitrate. More particularly preferably, the substance is one or more chemical compounds selected from the group consisting of tripotassium citrate, monoammonium phosphate, sodium bicarbonate, sodium acetate, and potassium carbonate. Particularly preferred chemical compounds favor char formation and therefore cause a particularly pronounced color change in cellulose.

[0040] The average permeability of the wrapping paper is at least 10 cm. 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 ·min·kPa), the section to which the composition has been applied is shaped to constitute at least 0.5% and at most 70%, preferably at least 1% and at most 60%, particularly preferably at least 1% and at most 20%, more particularly preferably at least 1% and at most 10% of the surface of the wrapper.

[0041] The average permeability of the wrapping paper is at least 10 cm. 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 ·min·kPa), the section must be molded so that at least one of the following two criteria (3) and (4) is met: (3) The average permeability of the wrapping paper is 10 cm 3 / (cm 2 ·min·kPa) greater than 20cm 3 / (cm 2 ·min·kPa), the standard deviation of the air permeability is at most 6 cm 3 / (cm 2 ·min·kPa), preferably at most 5.5 cm 3 / (cm 2 ·min ·kPa), particularly preferably at most 5 cm 3 / (cm 2 ·min·kPa) and the average air permeability of the wrapping paper is at least 20cm 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 ·min·kPa), the coefficient of variation of the air permeability is at most 30%, preferably at most 27.5%, in particular at most 25%, or (4) The section to which the composition is applied is shaped so that each imaginary circle of diameter D mm on the wrapper contains at least one area to which the composition is not applied, and the diameter D in mm is:

number

[0042] The average permeability of the wrapping paper is at least 0 cm 3 / (cm 2 ·min·kPa) and at most 10 cm 3 / (cm 2When the pressure is 100 kPa (1 / min·kPa), the composition can be applied to the entire surface or in sections. When applied in sections, the sections to which the composition is applied are preferably shaped so that each imaginary circle on the wrapper having a diameter of 12 mm, particularly preferably a diameter of 10 mm, and especially a diameter of 8 mm, contains at least one area to which the composition is not applied.

[0043] The average permeability of the wrapping paper is at least 0 cm 3 / (cm 2 ·min·kPa) and at most 10 cm 3 / (cm 2 ·min·kPa), and if the composition is applied only in sections, the sections to which the composition is applied are preferably shaped to constitute at least 0.5% and at most 70%, particularly preferably at least 1% and at most 60%, in particular at least 1% and at most 20%, in particular at least 1% and at most 10% of the surface of the wrapper.

[0044] The smaller the area over which the composition is applied, the less impact it will have on the wrapper's breathability on the average value and coefficient of variation of the wrapper, but on the other hand, the smaller the individual sections in which the color change is visible, and therefore the more difficult it will be to recognize that the aerosol product produced therefrom has already been used.

[0045] Criteria (3) and (4) are not equivalent in their effect, meaning that the fulfillment of one of the criteria does not necessarily mean the fulfillment of the other, but each is sufficient to result in a wrapper according to the invention that is well suited for use in aerosol products. The same is true for criteria (1) and (2) above.

[0046] The aerosol product according to the present invention is rod-shaped and comprises an aerosol-forming material and a wrapper according to the present invention, the wrapper enclosing the aerosol-forming material, and during intended use of the aerosol product, the aerosol-forming material is only heated, not combusted.

[0047] In a preferred embodiment of the aerosol product article, the aerosol-forming material is heated to a maximum temperature of at least 120°C and at most 500°C, particularly preferably to a maximum temperature of at least 200°C and at most 400°C.

[0048] In a preferred embodiment, the aerosol product further contains a filter.

[0049] The wrapping paper according to the present invention can be produced by a process according to the present invention comprising the following steps A to C: Providing A-base wrapping paper, applying the composition to a B-base wrapper; C - Drying the wrapper obtained in step B. The wrapper obtained in step C comprises pulp fibers, wherein at least 50% of the mass of the wrapper is formed by pulp fibers; The wrapping paper obtained in step C shall have a minimum thickness of 0 cm when measured using a 2 mm x 15 mm measuring head in accordance with ISO 2965:2009. 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 ·min·kPa) average air permeability, In step B, a composition containing a substance that promotes the thermal decomposition of cellulose and a binder is applied, and the average air permeability of the wrapping paper obtained in step C is at least 10 cm 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 ·min ·kPa), the composition is applied in step B to an area covering at least 0.5% and at most 70% of the surface of the wrapper, The average air permeability of the wrapping paper obtained in step C is at least 10 cm 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2·min·kPa), the wrapping paper obtained in step C satisfies at least one of the following two criteria (1) and (2): (1) The average air permeability of the wrapping paper obtained in step C is at least 10 cm 3 / (cm 2 ·min·kPa) and at most 20 cm 3 / (cm 2 ·min·kPa), the standard deviation of the air permeability is at most 6 cm 3 / (cm 2 ·min ·kPa), and the average air permeability of the wrapping paper obtained in step C is at least 20 cm 3 / (cm 2 ·min·kPa) and at most 200 cm 3 / (cm 2 ·min·kPa), the coefficient of variation of the air permeability is at most 30%, or (2) The section to which the composition is applied in step B is shaped so that each imaginary circle of diameter D mm on the wrapper contains at least one area to which the composition is not applied, and the diameter D in mm is:

number

[0050] With regard to the properties and components of the wrapping paper obtained in step C, the same necessary, preferred, particularly preferred and more particularly preferred values ​​and property ranges apply as already stated for the wrapping paper according to the invention. This applies in particular to the basis weight, the standard deviation and coefficient of variation of the air permeability, the type and amount of pulp fibres, the type and amount of filler and their proportion of, for example, the total surface of the wrapping paper, as well as the parameter D max and D min The choice of the composition depends on the design of the section to which the composition is applied.

[0051] The composition applied in step B comprises a substance that promotes the thermal decomposition of cellulose, a binder, and a solvent, the solvent being preferably water.

[0052] The substance in the composition in step B that promotes the pyrolysis of cellulose is a chemical compound or a mixture of two or more chemical compounds, which is preferably soluble in the solvent of the composition.

[0053] The substance that promotes the thermal decomposition of cellulose contained in the composition of step B is preferably one or more chemical compounds selected from the group consisting of citrate, malate, tartrate, acetate, nitrate, succinate, fumarate, gluconate, glycolate, lactate, oxylate, salicylate, α-hydroxycaprylate, bicarbonate, carbonate, chloride, polyphosphate, phosphonate, and phosphate, and particularly preferably one or more chemical compounds selected from the group consisting of trisodium citrate, tripotassium citrate, monoammonium phosphate, sodium acetate, potassium acetate, sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, sodium tartrate, potassium sodium tartrate, potassium formate, sodium formate, sodium nitrate, and potassium nitrate. More particularly preferably, the substance is one or more chemical compounds selected from the group consisting of tripotassium citrate, monoammonium phosphate, sodium bicarbonate, sodium acetate, and potassium carbonate.

[0054] The composition applied to the base wrapper in step B preferably contains a substance that promotes the thermal decomposition of cellulose in an amount of at least 3% and at most 30%, particularly preferably at least 4% and at most 25%, in particular at least 5% and at most 20%, respectively, based on the weight of the composition.

[0055] The binder in the composition of step B is preferably selected from the group consisting of starch, starch derivatives, cellulose derivatives, carboxymethylcellulose, alginate, pectin, polyvinyl alcohol, guar, gum arabic, or mixtures thereof.

[0056] The composition applied to the base wrapper in step B preferably contains a binder in an amount of at least 0.1% and at most 15%, particularly preferably at least 0.3% and at most 12%, in particular at least 0.5% and at most 10%, based on the amount of the composition, respectively. The amount of binder in this respect also depends on the requirements of the application process in step B, in particular with regard to the viscosity of the composition.

[0057] During drying in step C, the solvent is substantially removed from the composition, and the applied and dried composition then has a dry weight of preferably at least 0.2 g / m2 relative to the area to which the composition is actually applied. 2 and at most 8 g / m 2 , particularly preferably at least 0.5 g / m 2 and at most 6 g / m 2 , especially at least 1 g / m 2 and at most 5 g / m 2 The amount is applied in an amount of 0.15 wt.

[0058] The application in step B can be carried out by a variety of processes, with printing and spraying being preferred, and rotogravure and flexographic printing being particularly preferred.

[0059] The drying process in step C can be carried out by various processes, preferably by contact with one or more heated cylinders, contact with hot air, infrared radiation, microwave radiation, and combinations thereof.

[0060] A particularly preferred embodiment of the process according to the invention comprises, after step C, the additional steps D and E, in which in step D water is applied to the entire surface of the wrapper obtained in step C, and in step E the wrapper from step D is dried, more particularly preferably by contacting it with one or more heated cylinders. During application of the composition in step B, in particular if the solvent contains water, wrinkles may occur after drying in step C. Through steps D and E of this particularly preferred embodiment of the process according to the invention, such wrinkles can be significantly reduced or avoided altogether. [Brief explanation of the drawings]

[0061] [Figure 1] FIG. 1 shows an example of a wrapping paper and the locations at which 10 measurements can be taken to determine the standard deviation and coefficient of variation of breathability. DETAILED DESCRIPTION OF THE INVENTION

[0062] In the following, some preferred embodiments of the wrapping paper according to the present invention are described.

[0063] Two sheets of paper designated Base Wrapper A and Base Wrapper B were used as base wrappers in step A of the process according to the present invention.

[0064] Base wrapping paper A is 29 g / m 2 and had 69% wood pulp fiber and 31% precipitated calcium carbonate as fillers. The percentages refer to the mass of the base wrapper. The wood pulp fiber was a mixture of pulp fibers derived from coniferous and deciduous trees. Base wrapper A had a basis weight of 60.1 cm 3 / (cm 2 The air permeability was measured at 10 randomly selected locations using a measuring head with an opening of 2 mm x 15 mm in accordance with ISO 2965:2009, with an average air permeability of 10 mm.

[0065] Base wrapping paper B is 24g / m 2 and had 71% wood pulp fiber and 29% precipitated calcium carbonate as fillers. The percentages refer to the mass of the base wrapper. The wood pulp fiber was a mixture of pulp fibers derived from coniferous and deciduous trees. Base wrapper B had a basis weight of 74.8 cm 3 / (cm 2 The air permeability was measured at 10 randomly selected locations using a measuring head with an opening of 2 mm x 15 mm in accordance with ISO 2965:2009, with an average air permeability of 10 mm.

[0066] The different compositions were applied to the base wrappers A and B by rotogravure printing in sections in the form of a pattern of intersecting lines, 1.5 mm wide, so that the sections to which the compositions were applied constituted approximately 40% of the area of ​​the base wrapper.

[0067] The amount of composition applied to this section is 30 g / m² for base wrapper A relative to the area where the composition is actually applied. 2 , base wrapping paper B is 25g / m 2 It was.

[0068] The wrapper was then dried according to step C of the process of the present invention.

[0069] The parameters related to the production of the wrapper are shown in Table 1. The "Number" column indicates the wrapper number, and the "BP" column indicates which base wrapper was used for production. Under the "Composition" column, the binder and the substance accelerating the thermal decomposition of cellulose are given as a % of the mass of the composition. The type of binder is provided, where "CMC" means carboxymethyl cellulose, "St" means starch. The type of substance is also provided, where "TKZ" means tripotassium citrate, "MAP" means monoammonium phosphate, "NaAc" means sodium acetate, and "KCrb" means potassium carbonate. Under the "Wrapper" column, the amount of binder and substance accelerating the thermal decomposition of cellulose is given in g / m2 Provided as a % of the basis weight of the wrapping paper in g / m 2 The amount of the substance in g / m 2 It is given as a ratio "V" to the amount of pulp fiber in a unit of wrapper.

[0070] [Table 1]

[0071] For base wrapping papers A and B, the air permeability was measured at 10 randomly selected positions using a measuring head with a 2 mm x 15 mm opening in accordance with ISO 2965:2009, and the average value was calculated. For wrapping papers 1 to 12 made from base wrapping paper A, the air permeability was measured at 42 cm 3 / (cm 2 ·min·kPa) to 48cm 3 / (cm 2 The average air permeability (min·kPa) was found for wrapping papers 13 to 18 made from base wrapping paper B. The average air permeability was measured at 50 cm 3 / (cm 2 ·min·kPa) to 55cm 3 / (cm 2 ·min·kPa).

[0072] For the tests under criteria (1) or (3), the coefficient of variation of breathability was determined in accordance with ISO 2965:2009 using a measuring head with a 2 mm x 15 mm opening. The measurement method is described with reference to Figure 1. For wrapping paper 1 in Figure 1, the composition was applied in the shape of an intersection line 2. A measuring head with a 2 mm x 15 mm opening was placed at 10 adjacent positions 3a to 3j, each shifted by 3 mm, resulting in a 1 mm distance between the areas. The breathability was measured for each of positions 3a to 3j. The mean and standard deviation were determined, and the coefficient of variation was calculated. For wrapping papers 1 to 12 made from base wrapping paper A, a coefficient of variation of 10% to 15% was obtained. For wrapping papers 13 to 18 made from base wrapping paper B, a coefficient of variation of 12% to 17% was obtained. As a result, criteria (1) and (3) were met.

[0073] For the tests of criteria (2) and (4), the diameter of the imaginary circle was determined for each of wrappers 1 to 18 based on the measured average air permeability.

[0074] For wrappers 1 to 12 made from base wrapper A, 42 cm 3 / (cm 2 ·min·kPa) to 48cm 3 / (cm 2 Based on the average air permeability (min·kPa), the results are

number

number

[0075] For wrappers 13 to 18 made from base wrapper B, 50 cm 3 / (cm 2 ·min·kPa) to 55cm 3 / (cm 2 Based on the average air permeability (min·kPa), the results are

number

number

[0076] A pattern with horizontal lines 1.5 mm wide clearly meets the requirements of criteria (2) and (4), and therefore these criteria are met for all wrappers 1 to 18.

[0077] Wrappers 1 through 18 were heated to 130° C. for 5 minutes. After just 1 minute, a color change was observed in wrappers 1, 3, 6, 8, 11, 12, 13, and 17. After 5 minutes, all of the wrappers according to the invention showed a significant, irreversible color change to a yellowish color in the sections where the composition was applied, and a light to dark brown color upon heating for longer periods, clearly distinguishable from the unchanged or barely changed color outside of these sections.

[0078] A conventional aerosol product was produced from a wrapper heated in a heating device as intended. After the aerosol product was removed from the heating device, a clear color change could be identified in the printed section, so that used and unused aerosol products were clearly distinguishable from each other.

Claims

1. 1. A paper wrapper for an aerosol product comprising pulp fibers, wherein during intended use of the aerosol product, the aerosol-forming material is heated but not combusted, and the paper wrapper encloses the aerosol-forming material, At least 50% of the mass of the wrapper paper is formed from pulp fibers; When the wrapping paper was measured at 10 randomly selected positions according to ISO 2965:2009 with a 2 mm x 15 mm measuring head, At least 10 cm ３ / (cm ２ min kPa) and at most 200 cm ３ / (cm ２ ・min ・kPa) of average air permeability, and applying a composition comprising a substance that promotes the thermal decomposition of cellulose and a binder, wherein the substance that promotes the thermal decomposition of cellulose is capable of causing an irreversible color change in the wrapper paper due to thermal decomposition of cellulose in the paper that is discernible with the naked eye when the wrapper paper is heated to a temperature of at least 130°C for 5 minutes, and wherein the composition is applied only to a section that covers at least 0.5% and at most 70% of the surface of the wrapper paper; The substance that promotes the thermal decomposition of cellulose is present in an amount of at least 0.2 g / m2 in the area of ​​the wrapping paper to which the composition is applied. ２ and at most 8.0 g / m ２ It is contained in an amount of the substance that promotes thermal decomposition of cellulose is one or more chemical compounds selected from the group consisting of citrate, malate, tartrate, acetate, nitrate, succinate, fumarate, gluconate, glycolate, lactate, oxylate, salicylate, alpha-hydroxycaprylate, bicarbonate, carbonate, chloride, polyphosphate, phosphonate, and phosphate; The sections are further arranged on the wrapper such that both of the following criteria (1) and (2) are met: (1) The average air permeability of the wrapping paper is at most 20 cm ３ / (cm ２ ・min ・kPa), the standard deviation of the air permeability is at most 6 cm ３ / (cm ２ min kPa), the standard deviation being determined from 10 measurements using the 2 mm x 15 mm measuring head on closely spaced, non-overlapping areas; The average air permeability of the wrapping paper is at least 20 cm ３ / (cm ２ min kPa) and at most 200 cm ３ / (cm ２ In the case of a permeability (kPa), the coefficient of variation of the air permeability is at most 30%, the coefficient of variation being defined as the quotient of the standard deviation and the mean value of the 10 measurements from which the standard deviation is determined. (2) The section to which the composition is applied is shaped so that each imaginary circle having a diameter D mm on the wrapper contains at least one area to which the composition is not applied, and the diameter D in mm is: [Equation 1] from the average air permeability x in cm 3 / (cm 2 ·min ·kPa) by: where D max =12 mm and D min =6 mm, and said average air permeability x corresponds to the average value from 10 measurements at randomly selected locations on said wrapper.

2. At least 15 g / m ２ 10. The wrapping paper of claim 1 having a basis weight of

3. At most 45 g / m ２ 3. The wrapping paper of claim 1 or 2, having a basis weight of

4. 4. The wrapping paper of claim 1, wherein the pulp fibers comprise at least 60% of the weight of the wrapping paper.

5. 5. The wrapping paper of any one of claims 1 to 4, wherein the pulp fibers are sourced from one or more plants selected from the group consisting of conifers, deciduous trees, spruce, pine, fir, beech, birch, eucalyptus, flax, hemp, jute, ramie, abaca, sisal, kenaf, and cotton.

6. 6. The wrapping paper of claim 1, wherein at least a portion of the pulp fibers are bleached, and when unbleached pulp fibers are present, the proportion of unbleached pulp fibers is at most 50% by mass of the pulp fibers.

7. 7. The wrapping paper of claim 1, containing one or more fillers, the total amount of fillers comprising at least 10% and at most 38% by weight of the wrapping paper.

8. 8. The wrapping paper of claim 7, wherein the filler is formed by white, water-insoluble particles and is selected from the group consisting of calcium carbonate, magnesium carbonate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, talc, kaolin, and titanium dioxide.

9. 9. The wrapping paper of claim 1, wherein the wrapping paper does not contain, or contains only in an amount not exceeding 0.5% of the mass of the wrapping paper per unit area, a substance that promotes the degradation of the cellulose outside the section to which the composition is applied.

10. 10. The wrapper according to claim 1, wherein the amount of binder applied to the sections of the wrapper is at most 5% of the mass of the wrapper per unit area.

11. 11. The wrapper paper of any one of claims 1 to 10, wherein the binder is selected from the group consisting of starch, starch derivatives, cellulose derivatives, carboxymethyl cellulose, alginate, pectin, polyvinyl alcohol, guar, gum arabic, or mixtures thereof.

12. The substance that promotes the thermal decomposition of cellulose is at least 0.3 g / m2 in the area of ​​the wrapping paper to which the composition containing the substance is applied. ２ and at most 7.0 g / m ２ The wrapping paper according to any one of claims 1 to 11, wherein the amount of

13. g / m2 relative to the area to which the cellulose-containing composition is applied ２ The amount of the substance that promotes the thermal decomposition of cellulose in units of g / m ２ 13. The wrapping paper of any one of claims 1 to 12, wherein the ratio of the amount of pulp fibre in the wrapping paper to the amount of pulp fibre in the unit is at least 0.05 and at most 0.

45.

14. 14. The wrapping paper of any one of claims 1 to 13, wherein the substance that promotes thermal decomposition of cellulose is one or more of the chemical compounds selected from the group consisting of trisodium citrate, tripotassium citrate, monoammonium phosphate, sodium acetate, potassium acetate, sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, sodium tartrate, potassium sodium tartrate, potassium formate, sodium formate, sodium nitrate, and potassium nitrate.

15. 15. The wrapper paper of any one of claims 1 to 14, wherein the section to which the composition is applied is shaped to constitute at least 1% and at most 60% of the surface of the wrapper paper.

16. 16. The wrapping paper of any one of claims 1 to 15, wherein the sections are shaped such that the following criterion (3) is met: (3) The average air permeability of the wrapping paper is 10 cm ３ / (cm ２ ・min ・kPa) greater than 20 cm ３ / (cm ２ When the standard deviation of the air permeability is less than 5.5 cm ３ / (cm ２ ・min ・kPa), and the average air permeability of the wrapping paper is at least 20 cm ３ / (cm ２ min kPa) and at most 200 cm ３ / (cm ２ .min..kPa), the coefficient of variation of the air permeability is at most 25%.

17. 1. A rod-shaped aerosol product comprising an aerosol-forming material and a wrapper, wherein the wrapper encloses the aerosol-forming material, and wherein the aerosol-forming material is only heated and not combusted during intended use of the aerosol product, At least 50% by mass of the wrapper paper comprises pulp fibers; When the wrapping paper was measured at 10 randomly selected positions according to ISO 2965:2009 with a 2 mm x 15 mm measuring head, At least 0 cm ３ / (cm ２ min kPa) and at most 200 cm ３ / (cm ２ ・min ・kPa) of average air permeability, and a composition comprising a substance that accelerates the thermal decomposition of cellulose and a binder is applied, wherein the substance that accelerates the thermal decomposition of cellulose can cause an irreversible color change in the wrapping paper due to thermal decomposition of cellulose in the paper that is discernible with the naked eye when the wrapping paper is heated to a temperature of at least 130°C for 5 minutes, and the average air permeability of the wrapping paper is 10 cm ３ / (cm ２ 1. An aerosol product, wherein the composition is applied only to a section covering at least 0.5% and at most 70% of the surface of the wrapper, and the section is further arranged on the wrapper such that both of the following criteria (1) and (2) are met: (1) The average air permeability of the wrapping paper is at least 10 cm ３ / (cm ２ min kPa) and at most 20 cm ３ / (cm ２ ・min ・kPa), the standard deviation of the air permeability is at most 6 cm ３ / (cm ２ min kPa), the standard deviation being determined from 10 measurements using the 2 mm x 15 mm measuring head on closely spaced, non-overlapping areas; The average air permeability of the wrapping paper is at least 20 cm ３ / (cm ２ min kPa) and at most 200 cm ３ / (cm ２ min kPa), the coefficient of variation of the air permeability is at most 30%, the coefficient of variation being defined as the quotient of the standard deviations and the average value of the 10 measurements at which the standard deviation is determined, (2) The section to which the composition is applied is shaped so that each imaginary circle of diameter D mm on the wrapper contains at least one area to which the composition is not applied, and the diameter D in mm is: [Equation 2] By cm ３ / (cm ２ Calculated from the average permeability x in units of D ｍａｘ = 12 mm and D ｍｉｎ = 6 mm, and the average air permeability x corresponds to the average value from 10 measurements taken at randomly selected locations on the wrapper.

18. 18. The rod-shaped aerosol product article according to claim 17, wherein during the intended use, the aerosol-forming material is heated to a maximum temperature of at least 120°C and at most 500°C, and / or contains a filter.

19. The wrapping paper has a thickness of at least 15 g / m ２ 19. The rod-shaped aerosol product article of claim 17 or 18, having a basis weight of

20. The wrapping paper has a thickness of at most 45 g / m ２ 20. The rod-shaped aerosol product article of any one of claims 17 to 19, having a basis weight of

21. 21. The rod-shaped aerosol product article of any one of claims 17 to 20, wherein the pulp fibers constitute at least 60% of the mass of the wrapper.

22. 22. The rod-shaped aerosol product article of any one of claims 17 to 21, wherein the pulp fibers are sourced from one or more plants selected from the group consisting of conifers, deciduous trees, spruce, pine, fir, beech, birch, eucalyptus, flax, hemp, jute, ramie, abaca, sisal, kenaf, and cotton.

23. 23. The rod-shaped aerosol product article of any one of claims 17 to 22, wherein at least a portion of the pulp fibers are bleached, and when unbleached pulp fibers are present, the proportion of unbleached pulp fibers is at most 50% by mass of the pulp fibers.

24. 24. The rod-shaped aerosol product article of any one of claims 17 to 23, wherein the wrapper contains one or more fillers, the total amount of fillers comprising at least 10% and at most 38% of the mass of the wrapper.

25. 25. The rod-shaped aerosol product of claim 24, wherein the filler is formed by white, water-insoluble particles and is selected from the group consisting of calcium carbonate, magnesium carbonate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, talc, kaolin, and titanium dioxide.

26. 26. The rod-shaped aerosol product article of any one of claims 17 to 25, wherein the wrapper paper does not contain a substance that promotes the decomposition of the cellulose outside the section to which the composition is applied, or contains only an amount that does not exceed 0.5% of the mass of the wrapper paper per unit area.

27. 27. A rod-shaped aerosol product article according to any one of claims 17 to 26, wherein the amount of binder applied to the section of the wrapper is at most 5% of the mass of the wrapper per unit area.

28. 28. The rod-shaped aerosol product article according to any one of claims 17 to 27, wherein the binder is selected from the group consisting of starch, starch derivatives, cellulose derivatives, carboxymethyl cellulose, alginate, pectin, polyvinyl alcohol, guar, gum arabic, or a mixture thereof.

29. The substance that promotes the thermal decomposition of cellulose is at least 0.3 g / m2 in the area of ​​the wrapping paper to which the composition containing the substance is applied. ２ and at most 7.0 g / m ２ 29. The rod-shaped aerosol product article according to any one of claims 17 to 28, wherein the rod-shaped aerosol product article is contained in an amount of

30. g / m2 relative to the area to which the cellulose-containing composition is applied ２ The amount of the substance that promotes the thermal decomposition of cellulose in units of g / m ２ 30. The rod-shaped aerosol product article of any one of claims 17 to 29, wherein the ratio of the amount of pulp fibers in the wrapper of a unit is at least 0.05 and at most 0.

45.

31. 31. The rod-shaped aerosol product article of any one of claims 17 to 30, wherein the substance that promotes thermal decomposition of cellulose is one or more of chemical compounds selected from the group consisting of trisodium citrate, tripotassium citrate, monoammonium phosphate, sodium acetate, potassium acetate, sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, sodium tartrate, potassium sodium tartrate, potassium formate, sodium formate, sodium nitrate, and potassium nitrate.

32. 32. A rod-shaped aerosol product article according to any one of claims 17 to 31, wherein the section to which the composition is applied is shaped to constitute at least 1% and at most 60% of the surface of the wrapper.

33. The wrapping paper has an average air permeability of at least 10 cm ３ / (cm ２ min kPa) and at most 200 cm ３ / (cm ２ 33. The rod-shaped aerosol product article according to any one of claims 17 to 32, wherein the section is shaped so that, when the pressure (MPa) is 1 / 2 min / kPa, at least one of the following two criteria (3) and (4) is satisfied: (3) The average air permeability of the wrapping paper is 10 cm ３ / (cm ２ ・min ・kPa) greater than 20 cm ３ / (cm ２ When the standard deviation of the air permeability is less than 5.5 cm ３ / (cm ２ ・min ・kPa), and the average air permeability of the wrapping paper is at least 20 cm ３ / (cm ２ min kPa) and at most 200 cm ３ / (cm ２ min kPa), the coefficient of variation of the air permeability is at most 25%, or (4) The section to which the composition is applied is shaped so that each imaginary circle of diameter D mm on the wrapper contains at least one area to which the composition is not applied, and the diameter D in mm is: [Equation 2] By cm ３ / (cm ２ Calculated from the average permeability x in units of D ｍａｘ = 10 mm and D ｍｉｎ = 6 mm.

34. The average air permeability of the wrapping paper is at least 0 cm ３ / (cm ２ min kPa) and at most 10 cm ３ / (cm ２ 34. The rod-shaped aerosol product article of any one of claims 17 to 33, wherein the composition is applied to the entire surface or to sections when the pressure is 120 kJ / min kPa, and when applied to sections, the sections to which the composition is applied to the wrapper are shaped such that each imaginary circle of 12 mm diameter on the wrapper contains at least one area to which the composition is not applied.

35. The average air permeability of the wrapping paper is at least 0 cm ３ / (cm ２ min kPa) and at most 10 cm ３ / (cm ２ 35. The rod-shaped aerosol product article of any one of claims 17 to 34, wherein the composition is shaped so that, when the composition is applied to only a section, the section to which the composition is applied constitutes at least 0.5% and at most 70% of the surface of the wrapper.

36. 1. A process for producing a wrapper for an aerosol product, wherein during intended use of the aerosol product, an aerosol-forming material is only heated and not combusted, comprising: The process comprises: providing an A-base wrapper; applying the composition to a B-base wrapper; C - drying the wrapper obtained in step B; The method comprises steps A to C, wherein the wrapping paper obtained after step C comprises pulp fibers, and at least 50% of the mass of the wrapping paper is formed by pulp fibers, and the wrapping paper obtained after step C has a thickness of at least 0 cm when measured using a 2 mm x 15 mm measuring head in accordance with ISO 2965:2009. ３ / (cm ２ min kPa) and at most 200 cm ３ / (cm ２ ・min ・kPa) of average air permeability, In step B, a composition is applied comprising a substance that promotes thermal decomposition of cellulose and a binder, wherein the substance that promotes thermal decomposition of cellulose is capable of causing an irreversible color change in the wrapper paper due to thermal decomposition of cellulose in the paper that is discernible to the naked eye when the wrapper paper is heated to a temperature of at least 130°C for 5 minutes; the substance that promotes thermal decomposition of cellulose is one or more chemical compounds selected from the group consisting of citrate, malate, tartrate, acetate, nitrate, succinate, fumarate, gluconate, glycolate, lactate, oxylate, salicylate, alpha-hydroxycaprylate, bicarbonate, carbonate, chloride, polyphosphate, phosphonate, and phosphate; In step B, the composition alone is applied to a section covering at least 0.5% and at most 70% of the surface of the wrapper; After step C, the substance that promotes the thermal decomposition of cellulose is present in an amount of at least 0.2 g / m2 in the area of ​​the wrapper paper to which the composition has been applied. ２ and at most 8.0 g / m ２ It is contained in an amount of The process wherein the wrapping paper obtained in step C satisfies both of the following criteria (1) and (2): (1) The wrapping paper obtained in step C has an average air permeability of at least 10 cm ３ / (cm ２ min kPa) and at most 20 cm ３ / (cm ２ ・min ・kPa), the standard deviation of the air permeability is at most 6 cm ３ / (cm ２ min kPa), The wrapping paper obtained in step C has an average air permeability of at least 20 cm ３ / (cm ２ min kPa) and at most 200 cm ３ / (cm ２ .min..kPa), the coefficient of variation of the air permeability is at most 30%. (2) The section to which the composition is applied is shaped so that each imaginary circle having a diameter D mm on the wrapper contains at least one area to which the composition is not applied, and the diameter D in mm is: [Equation 3] from the average air permeability x in cm 3 / (cm 2 ·min ·kPa) by: where D max =12 mm and D min =6 mm, and said average air permeability x corresponds to the average value from 10 measurements at randomly selected locations on said wrapper.

37. 37. The process of claim 36, wherein the composition applied in step B comprises a substance that promotes the thermal decomposition of cellulose, a binder, and a solvent, wherein the solvent is water.

38. 38. The process of claim 36 or 37, wherein the substance that promotes the thermal decomposition of cellulose in the composition of step B is a chemical compound or a mixture of two or more chemical compounds that dissolves in the solvent of the composition.

39. 39. The process of any one of claims 36 to 38, wherein the substance that promotes the thermal decomposition of cellulose contained in the composition of step B is one or more chemical compounds selected from the group consisting of trisodium citrate, tripotassium citrate, monoammonium phosphate, sodium acetate, potassium acetate, sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, sodium tartrate, potassium sodium tartrate, potassium formate, sodium formate, sodium nitrate, and potassium nitrate.

40. 40. The process of any one of claims 36 to 39, wherein the composition applied to the base wrapper in step B contains a substance that promotes thermal decomposition of the cellulose in an amount of at least 3% and at most 30%, respectively, relative to the weight of the composition.

41. 41. The process of any one of claims 36 to 40, wherein the binder in the composition of step B is selected from the group consisting of starch, starch derivatives, cellulose derivatives, carboxymethylcellulose, alginate, pectin, polyvinyl alcohol, guar, gum arabic, or mixtures thereof.

42. 42. The process of any one of claims 36 to 41, wherein the composition applied to the wrapper in step B contains the binder in an amount of at least 0.1% and at most 15%, respectively, relative to the amount of the composition.

43. During drying in step C, the solvent is substantially removed from the composition, and the applied dry composition then has a dry viscosity of at least 0.2 g / m2, respectively, relative to the area to which the composition is actually applied. ２ and at most 8 g / m ２ 43. The process of any one of claims 36 to 42, wherein the compound is present in an amount of

44. 44. The process of any one of claims 36 to 43, wherein applying the composition in step B is by printing or spraying.

45. 45. The process of any one of claims 36 to 44, wherein the drying process in step C is carried out by contact with one or more heated cylinders, contact with hot air, infrared radiation, microwave radiation, or a combination thereof.

46. 46. ​​The process of any one of claims 36 to 45, wherein the process comprises further additional steps D and E following step C, in which in step D water is applied to the entire surface of the wrapper paper obtained in step C, and in step E the wrapper paper from step D is dried by contact with one or more heated cylinders.

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