EP4127312B1 - Papier d'emballage pour articles à fumer avec un motif de cendres amélioré - Google Patents

Papier d'emballage pour articles à fumer avec un motif de cendres amélioré Download PDF

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Publication number
EP4127312B1
EP4127312B1 EP21715827.8A EP21715827A EP4127312B1 EP 4127312 B1 EP4127312 B1 EP 4127312B1 EP 21715827 A EP21715827 A EP 21715827A EP 4127312 B1 EP4127312 B1 EP 4127312B1
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EP
European Patent Office
Prior art keywords
calcium carbonate
carbonate particles
wrapper paper
pulp fibers
mass
Prior art date
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Application number
EP21715827.8A
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German (de)
English (en)
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EP4127312A1 (fr
Inventor
Thomas Fritzsching
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Delfortgroup AG
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Delfortgroup AG
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
    • D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/02—Cigars; Cigarettes with special covers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/20—Cigarettes specially adapted for simulated smoking devices

Definitions

  • the invention relates to a wrapping paper for smoking articles which contains cellulose fibres loaded with filler particles which give the paper particularly favourable properties.
  • the ash of a smoking article made from this wrapping paper has a better appearance.
  • a typical smoking article comprises a cylindrical tobacco rod containing an aerosol-forming material, typically tobacco or a tobacco-based material, which is wrapped in a wrapping material.
  • the wrapping material comprises a paper, i.e. a sheet-like material containing cellulose fibers.
  • a smoking article can comprise a filter wrapped in a filter wrapping paper and a tipping paper that simultaneously wraps the filter and part of the tobacco rod, thus connecting the filter and the tobacco rod together.
  • the aerosol-forming material When the smoking article is used, the aerosol-forming material is heated or burned to create an aerosol which flows through the smoking article when the smoking article is used and is inhaled by the consumer.
  • the smoking article may also include components that transmit the aerosol or cool the aerosol, and are typically arranged between the tobacco rod and the filter.
  • the wrapping paper of the tobacco rod is thermally degraded.
  • the wrapping paper can discolor and partially lose its mechanical stability, which is why the visual appearance of the smoking article changes.
  • This appearance of a used or in-use smoking article and in particular its tobacco rod is known as the ash image.
  • the basis weight of the wrapping paper can be increased or burning salts such as trisodium citrate or tripotassium citrate can be added or their content can be increased.
  • these possibilities have the disadvantage that they increase the proportion of non-tobacco materials in the smoking article and can therefore negatively change the taste of the smoking article.
  • DE102004045089 A1 discloses a method for loading a fiber suspension of cellulose fibers with calcium carbonate, which is characterized by the following process steps: introducing calcium hydroxide in liquid or dry form or calcium oxide into the fiber suspension, introducing carbon dioxide into the fiber suspension, precipitating calcium carbonate from the calcium hydroxide by the carbon dioxide in a pressurized pressure vessel.
  • DE10351292A1 discloses a method for loading a cellulose fiber-containing fiber suspension with calcium carbonate, which comprises the following method steps: introducing calcium hydroxide in liquid or dry form or calcium oxide into the fiber suspension, introducing gaseous carbon dioxide into the fiber suspension, precipitating calcium carbonate by the carbon dioxide, grinding the fiber suspension during the loading process and washing the fiber suspension after the crystallization process and/or before the grinding process and/or during the grinding process and/or after the grinding process.
  • DE102015105882A1 discloses a wrapping paper for smoking articles with a basis weight of at least 10 g/m 2 and at most 70 g/m 2 , which comprises a mixture of cellulose fibers, wherein the mixture of cellulose fibers is formed by at least 90% short-fiber cellulose fibers in relation to the mass of the cellulose fibers in the cellulose mixture, or at least 95% short-fiber cellulose fibers in relation to the number of cellulose fibers, wherein at least 10% of the short-fiber cellulose fibers, in relation to the mass of the number of cellulose fibers in the cellulose fiber mixture, are ground, wherein the wrapping paper has an air permeability on more than 50% of its surface, preferably at least 55% of its surface and particularly preferably at least 60% of its surface which is at least 30 cm 3 /(cm 2 ⁇ min ⁇ kPa), and wherein the wrapping paper contains at least one fire salt.
  • wrapping paper shall mean any paper that wraps the smoking article or at least one of its components.
  • the invention is based on the object of providing a wrapping paper for smoking articles which gives the smoking article a good ash appearance without the mass of the wrapping paper having to be significantly increased or unusual components having to be added to the wrapping paper.
  • the inventor has found that this problem can be solved by the wrapping paper containing cellulose fibers loaded with calcium carbonate particles.
  • Cellulose fibers and calcium carbonate particles are common components of wrapping papers for smoking articles, but in the prior art the calcium carbonate particles are not connected to the cellulose fibers, but are only arranged between the cellulose fibers.
  • Such calcium carbonate particles are referred to as "free calcium carbonate particles" to distinguish them from the calcium carbonate particles with which the cellulose fibers are loaded, i.e. connected.
  • Such cellulose fibers loaded with calcium carbonate particles can be produced, for example, by precipitating the calcium carbonate in the simultaneous presence of the cellulose fibers and by appropriately managing the precipitation process.
  • the wrapping paper according to the invention comprises cellulose fibers loaded with calcium carbonate particles, wherein the mass of the cellulose fibers loaded with calcium carbonate particles is at least 10% of the mass of the wrapping paper and the calcium carbonate particles in the cellulose fibers loaded with calcium carbonate particles make up at least 20% and at most 80% of the mass of the cellulose fibers loaded with calcium carbonate particles.
  • the inventor assumes that the calcium carbonate particles connected to the pulp fibers form a framework that remains after the thermal degradation of the pulp fibers and thus ensures the stability of the thermally degraded wrapping paper and thus prevents, for example, ash particles of the aerosol-forming material from penetrating the wrapping paper. In this way, the overall ash pattern of the Smoking article.
  • the free calcium carbonate particles do not form such framework-like structures and therefore do not contribute to improving the ash pattern to the same extent. Therefore, with a comparable ash pattern, the mass of calcium carbonate particles in the wrapping paper can be reduced by using cellulose fibers loaded with calcium carbonate particles or the overall mass of the wrapping paper can be reduced. This also reduces the influence of the wrapping paper on the taste of the smoking article.
  • Both the cellulose fibers and the cellulose fibers loaded with calcium carbonate particles can be obtained from softwoods such as spruce, pine or fir, from hardwoods such as eucalyptus, birch or beech, or from other plants such as hemp, flax, jute, sisal, abaca or cotton.
  • the cellulose fibers can also be obtained from regenerated cellulose, such as viscose fibers, modal fibers, Lyocell ® or Tencel ® . Mixtures of cellulose fibers from different sources can be used.
  • the wrapping paper according to the invention contains at least 10% cellulose fibers loaded with calcium carbonate particles.
  • the wrapping paper can be uncoated or coated.
  • the cellulose fibers loaded with calcium carbonate particles can be in the mass of the wrapping paper or in an optional coating on the wrapping paper. If cellulose fibers loaded with calcium carbonate particles are in the mass of the wrapping paper, the proportion of cellulose fibers loaded with calcium carbonate particles is preferably higher and amounts to at least 30% and at most 70%, in each case based on the mass of the wrapping paper.
  • a high proportion of pulp fibres loaded with calcium carbonate particles allows the proportion of free calcium carbonate particles to be reduced and at the same time the ash formation to be improved. It is even possible that the use of pulp fibres loaded with calcium carbonate particles can reduce the total content of calcium carbonate particles in the wrapping paper. can be reduced without impairing the ash appearance. However, the cellulose fibers loaded with calcium carbonate particles form fewer hydrogen bonds, so that the overall tensile strength of the wrapping paper can decrease. Therefore, the amount of cellulose fibers loaded with calcium carbonate particles in the wrapping paper cannot be chosen to be arbitrarily high, especially if the cellulose fibers are loaded with a large amount of calcium carbonate particles.
  • the cellulose fibers loaded with calcium carbonate particles are obtained from hardwoods such as eucalyptus, birch or beech. These cellulose fibers are generally subjected to less mechanical stress during the production of the wrapping paper, for example during grinding, so that fewer calcium carbonate particles can be lost in the production process.
  • the calcium carbonate particles of the cellulose fibers loaded with calcium carbonate particles are preferably precipitated calcium carbonate particles and particularly preferably precipitated calcium carbonate particles with a rhombohedral structure. These structures can be produced particularly well in a precipitation process on the cellulose fibers.
  • the mass of calcium carbonate particles based on the mass of the cellulose fibers loaded with calcium carbonate particles in the wrapping paper according to the invention is preferably at least 20% and at most 60%. In the preferred interval, a particularly favorable compromise is achieved between the desired improvement in the ash pattern and the undesirable reduction in the tensile strength.
  • the wrapping paper can also contain free fillers that are not bound to the pulp fibers.
  • the proportion of free fillers is preferably at least 1% and at most 40%, particularly preferably at least 5% and at most 35% and very particularly preferably at least 10% and at most 30%, in each case based on the mass of the wrapping paper.
  • These fillers can serve to influence the whiteness, opacity and pore structure of the wrapping paper.
  • a high content of free fillers reduces the tensile strength of the wrapping paper.
  • the free fillers in the wrapping paper are preferably carbonates, oxides, hydroxides and silicates.
  • Particularly preferred fillers are calcium carbonate, magnesium carbonate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, titanium dioxide, talc, kaolin, calcined Kaolin and mixtures thereof. Precipitated calcium carbonate is particularly preferred.
  • the ratio between the mass of calcium carbonate particles contained in the cellulose fibers loaded with calcium carbonate particles and the mass of free filler particles in the wrapping paper can be important for adjusting the ash image in relation to other properties such as whiteness, opacity and tensile strength.
  • the ratio of the mass of calcium carbonate particles contained in the cellulose fibers loaded with calcium carbonate particles and the mass of free filler particles in the wrapping paper is 5:95 to 100:0, particularly preferably it is 10:90 to 80:20 and very particularly preferably it is 10:90 to 50:50.
  • the wrapping paper can also contain burn salts.
  • the burn salts influence the speed of the thermal degradation of the wrapping paper and can also help to improve the ash pattern because they act partly as an adhesive or as a sintering aid between the free filler particles and thus improve the mechanical stability of the thermally degraded wrapping paper.
  • Burn salts are preferably used in the wrapping paper that wraps the tobacco rod.
  • the proportion of fire salts in the wrapping paper can be selected variably, whereby the proportion is preferably at least 0.3% and at most 7%, particularly preferably at least 0.5% and at most 5% and very particularly preferably at least 0.5% and at most 3%, in each case based on the mass of the wrapping paper.
  • the burn salts can preferably be selected from the group consisting of citrates, malates, tartrates, acetates, nitrates, succinates, fumarates, gluconates, glycolates, lactates, oxylates, salicylates, ⁇ -hydroxycaprylates, phosphates, chlorides and hydrogen carbonates, and mixtures thereof and particularly preferably from the group consisting of trisodium citrate, tripotassium citrate and mixtures thereof.
  • the wrapping paper is provided essentially over its entire surface with a coating that contains free calcium carbonate particles and/or cellulose fibers loaded with calcium carbonate particles.
  • a coating that contains free calcium carbonate particles and/or cellulose fibers loaded with calcium carbonate particles.
  • “Essentially coated over the entire surface” means that a full-surface coating is intended or at least 95% of the surface is coated.
  • a suitably selected coating can further improve the ash pattern without adding unusual components to the wrapping paper.
  • the coating increases the content of calcium carbonate particles on the paper surface, so that a stable framework can be formed more easily, which ensures the mechanical stability of the wrapping paper after its thermal degradation.
  • the coating can be carried out by applying a composition by means of methods known from the prior art, such as in a size press or a film press of a paper machine, in coating or coating units or by means of a printing machine, in particular a gravure printing machine.
  • a composition suitable for producing the coating comprises a solvent, preferably water, and calcium carbonate particles or cellulose fibers loaded with calcium carbonate particles.
  • Calcium carbonate particles that are not part of the calcium carbonate particles of the loaded cellulose fibers are referred to as free calcium carbonate particles, as in the wrapping paper itself.
  • the proportion of free calcium carbonate particles in the composition can preferably be at least 0% and at most 40%, particularly preferably at least 5% and at most 30%, in each case based on the mass of the composition.
  • the proportion of cellulose fibers loaded with calcium carbonate particles can preferably be at least 0% and at most 10%, particularly preferably at least 1% and at most 7%, in each case based on the mass of the composition. It should be noted that the above-mentioned coating corresponds to the applied composition in the dried state, i.e. when the solvent in particular has evaporated.
  • the composition should contain a binder to fix the free calcium carbonate particles to the wrapping paper. This binder then also remains in the coating formed by applying the composition. If the composition contains calcium carbonate particles only in the form of cellulose fibers loaded with them, a binder is not absolutely necessary, but is also preferable for better fixation.
  • the binder is particularly preferably selected from the group consisting of starch, starch derivatives, carboxymethylcellulose, cellulose derivatives, polyvinyl alcohol, galactomannan, gum arabic, alginates and mixtures thereof.
  • the starch is very particularly preferably a mechanically fragmented and chemically cross-linked starch because it is not chemically soluble in water and therefore penetrates the paper structure less and thus reduces the air permeability of the wrapping paper less.
  • the skilled person can choose the amount of binder from experience, particularly with regard to the requirements of the application process.
  • composition may comprise further components which the person skilled in the art can suitably select, including, for example, fire salts, dyes, flavourings, humectants such as glycerol or propylene glycol, or substances for influencing the viscosity.
  • the composition can be applied to one or both sides of the wrapping paper, but preferably the composition is applied to the side that is the smoking article made from it. This side is generally already known during the manufacture of the wrapping paper and in most cases is the side facing away from the paper machine screen.
  • the composition is therefore preferably applied to the side of the wrapping paper facing away from the paper machine screen, which is also referred to as the top side.
  • the basis weight of the coating is preferably at least 0.5 g/m 2 and at most 10 g/m 2 , particularly preferably at least 1 g/m 2 and at most 5 g/m 2 .
  • the mass of the free calcium carbonate particles and the calcium carbonate particles of the loaded pulp fibers in the coating together amounts to at least 1% and at most 20%, particularly preferably at least 2% and at most 15% of the mass of the coated wrapping paper.
  • the wrapping paper preferably additionally contains pulp fibers loaded with calcium carbonate particles in the mass, the mass of the pulp fibers loaded with calcium carbonate particles in the wrapping paper without the coating preferably being at least 1% and at most 70%, particularly preferably at least 1% and at most 60% of the mass of the wrapping paper, and the calcium carbonate particles in the pulp fibers loaded with calcium carbonate particles make up at least 10% and at most 60% of the mass of the pulp fibers loaded with calcium carbonate particles.
  • the wrapping paper according to the invention can also be part of a laminate, particularly preferably a laminate with another material with a thermal conductivity that exceeds that of the wrapping paper by a factor of at least two, preferably at least four.
  • the other material of the laminate is formed by an aluminum foil.
  • the smoking article is a cigarette and the wrapping paper additionally has patterns or structures, particularly preferably bands printed in the circumferential direction, in order to reduce the tendency of the smoking article to ignite measured according to ISO 12863:2010.
  • the basis weight of the wrapping paper according to the invention is preferably at least 15 g/m 2 and at most 150 g/m 2 , particularly preferably at least 20 g/m 2 and at most 120 g/m 2 , very particularly preferably at least 20 g/m 2 and at most 40 g/m 2 .
  • the basis weight of the wrapping paper can be determined according to ISO 536:2019, whereby a coating, if present, counts towards the basis weight.
  • the thickness of the wrapping paper according to the invention is preferably at least 10 ⁇ m and at most 200 ⁇ m, preferably at least 15 ⁇ m and at most 120 ⁇ m and very particularly preferably at least 30 ⁇ m and at most 100 ⁇ m.
  • the thickness can be determined according to ISO 534:2011 on a single layer of the wrapping paper.
  • the mechanical properties of the wrapping paper according to the invention can be important for the manufacture of a smoking article from this wrapping paper.
  • the essential mechanical properties include tensile strength, elongation at break and energy absorption capacity, all of which can be determined according to ISO 1924-2:2008.
  • the tensile strength of the wrapping paper is preferably at least 7 N/15 mm, particularly preferably at least 8 N/15 mm and very particularly preferably at least 10 N/15 mm. Since the material and energy expenditure in paper production to increase the tensile strength is high, it is advantageous if the tensile strength is at most 100 N/15 mm, preferably at most 80 N/15 mm and particularly preferably at most 70 N/15 mm.
  • the tensile strength can be increased primarily by increasing the basis weight and increasing the proportion of cellulose fibers, as well as by more intensive grinding of the cellulose fibers.
  • the wrapping paper has a certain degree of stretchability.
  • the breaking elongation of the wrapping paper according to the invention is preferably at least 0.9% and at most 3%, particularly preferably at least 1% and at most 2%.
  • the energy absorption capacity describes how much energy is required to tear the paper.
  • the energy absorption capacity is at least 3 J/m 2 and at most 50 J/m 2 and very particularly preferably at least 3.5 J/m 2 and at most 35 J/m 2 .
  • the whiteness (ISO brightness) of the wrapping paper can be important for its optical appearance and also for the ash pattern. It is measured according to ISO 2470-1:2016. In general, white wrapping papers are preferred for optical reasons, so that the whiteness of the wrapping paper according to the invention is at least 80% and particularly preferably at least 90%.
  • the whiteness can be influenced, for example, by the choice of free fillers; in particular, the whiteness can be significantly increased with titanium dioxide.
  • the opacity of the wrapping paper is also important for the visual appearance.
  • a high opacity is generally beneficial because components of the smoking article are then not visible through the wrapping paper.
  • the opacity is measured according to ISO 2471:2008.
  • the opacity of the wrapping paper is at least 70% and particularly preferably at least 80%.
  • the opacity can also be increased by increasing the amount of free fillers in the wrapping paper.
  • the wrapping paper according to the invention on a smoking article, its air permeability is important.
  • air should flow through the wrapping paper into the smoking article in order to dilute the aerosol.
  • the air permeability can be measured according to ISO 2965:2019.
  • the wrapping paper comprises pulp fibers loaded with calcium carbonate particles, wherein the mass of the pulp fibers loaded with calcium carbonate particles is at least 10% of the mass of the wrapping paper and the calcium carbonate particles in the pulp fibers loaded with calcium carbonate particles make up at least 20% and at most 80% of the mass of the pulp fibers loaded with calcium carbonate particles and the wrapping paper has an air permeability according to ISO 2965:2019 of at least 50 cm 3 /(cm 2 ⁇ min ⁇ kPa) and at most 300 cm 3 /(cm 2 ⁇ min ⁇ kPa).
  • a coating is not preferred for this particular embodiment because it can reduce air permeability too much.
  • a smoking article according to the invention comprises an aerosol-forming material and the wrapping paper according to the invention.
  • the aerosol-forming material comprises tobacco and said wrapping paper envelops the aerosol-forming material.
  • the smoking article is a smoking article according to the invention in which the aerosol-forming material is only heated but not burned.
  • the smoking article is a cigarette and the wrapping paper is a cigarette paper.
  • Both the wrapping paper according to the invention and the smoking article according to the invention can be produced using methods known per se in the prior art.
  • the non-inventive wrapping paper used as a reference had a basis weight of 32.6 g/m 2 and was made from 28% softwood pulp fibers and 42% hardwood pulp fibers as well as 30% free calcium carbonate particles, the percentages referring to the mass of the wrapping paper. Further properties of the wrapping paper can be seen in Table 1 in the "REF" line.
  • a total of 14 wrapping papers according to the invention designated A to K and X to Z, were produced, the composition of the wrapping papers being given in Table 1.
  • Table 1 "SW” in % means the proportion of pulp fibers from softwoods, "HW” in % the proportion of pulp fibers from hardwoods, "CF” in % the proportion of pulp fibers loaded with calcium carbonate particles and "FI” in % the proportion of free fillers. The percentages are based on the mass of the wrapping paper.
  • the pulp fibers from softwood and hardwood are standard products available on the market.
  • the pulp fibers loaded with calcium carbonate particles were purchased from Schaefer Kalk. All of the free filler was formed from precipitated calcium carbonate particles.
  • Wrapping paper X was identical to wrapping paper REF and wrapping papers Y and Z were identical to wrapping paper G.
  • Wrapping paper Y was fully coated with a composition of 89% water, 5.5% mechanically fragmented and chemically cross-linked starch and 5.5% free calcium carbonate particles, with the percentages referring to the mass of the composition.
  • Wrapping papers X and Z were fully coated with a composition of 95.5% water, 1% mechanically fragmented and chemically cross-linked starch and 3.5% calcium carbonate particles. loaded fibers, whereby the percentages refer to the mass of the composition. After application and drying of the composition, a mass of approximately 2 g/m 2 remained on the wrapping papers.
  • the mechanically fragmented, chemically cross-linked starch can be obtained, for example, from the company Emsland-Stärke GmbH.
  • Smoking articles in the form of filter cigarettes with a diameter of approximately 7.8 mm and a length of 83 mm were produced from the non-inventive wrapping paper REF and the inventive wrapping papers A to K and X to Z.
  • the tobacco used was an American blend and the wrapping papers wrapped the tobacco in each case.
  • the ash pattern of these smoking articles was evaluated using an image analysis method. Three cigarettes of each cigarette were lit in a vertical position and the tobacco was waited for to completely smolder. A digital image of each cigarette was then taken against a neutral background under constant lighting conditions. Image analysis software then determined the proportion of non-white areas in the area of the smoldered tobacco rod.
  • the proportion of these non-white areas in relation to the total area of the smoldered tobacco rod is expressed as a percentage and referred to as the " Ash Index ", with an average value being calculated from the images of three cigarettes in each case.
  • Ash Index an average value being calculated from the images of three cigarettes in each case. The higher the percentage, the more non-white areas the smoldering tobacco rod contains and the worse the consumer judges the ash appearance.
  • Figure 3 shows the ash pattern of three filter cigarettes made from the non-inventive wrapping paper REF.
  • Figure 4 shows the ash image of three filter cigarettes that were made from the wrapping paper K according to the invention. Even without quantifying the ash image by image analysis, the difference is already clearly visible.
  • wrapping papers A to K according to the invention was to achieve properties that were as similar as possible to the non-inventive wrapping paper REF in order to be able to clearly demonstrate the positive effect of the cellulose fibers loaded with calcium carbonate particles.
  • the examples are therefore not to be understood as a limitation of the invention and the person skilled in the art is able to produce wrapping papers according to the invention with, for example, a different composition, a different basis weight, a different thickness, a different air permeability or other mechanical or optical properties in the claimed range.
  • the wrapping papers A to K according to the invention are very similar to the non-inventive wrapping paper REF in terms of basis weight, thickness, elongation at break, whiteness and opacity.
  • the tensile strength and thus also the energy absorption capacity of the wrapping papers A to K are somewhat lower than for the non-inventive wrapping paper REF. This is caused by the cellulose fibers loaded with calcium carbonate particles, since the calcium carbonate particles on the cellulose fibers hinder the formation of hydrogen bonds between the cellulose fibers and thus reduce the tensile strength of the wrapping paper.
  • the air permeability of the wrapping papers A to K is higher than that of the wrapping paper not according to the invention. Despite this higher air permeability, the cigarettes made from the wrapping papers A to K have a better ash pattern than the cigarettes made from the wrapping paper REF. This shows that with high air permeability, the use of cellulose fibers loaded with calcium carbonate particles offers a very special advantage.
  • the specialist can of course reduce the air permeability of the wrapping papers A to K, for example by grinding the pulp fibers more intensively, and thus set the same value as for the wrapping paper REF. It is to be expected that the Ash Index will then fall even further and the ash pattern will thus improve even further.
  • the coated wrapping papers X, Y and Z all show an improvement in the ash image.
  • the papers X to Z also all have a higher tensile strength than the non-inventive wrapping paper REF and than the uncoated, inventive wrapping papers A to K, which is a further advantage of these embodiments.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Laminated Bodies (AREA)

Claims (15)

  1. Papier d'enveloppe pour des articles à fumer, qui comprend des fibres de cellulose chargées avec des particules de carbonate de calcium, dans lequel la masse des fibres de cellulose chargées avec des particules de carbonate de calcium représente au moins 10 % de la masse du papier d'enveloppe et les particules de carbonate de calcium représentent, dans les fibres de cellulose chargées avec des particules de carbonate de calcium, au moins 20 % et au maximum 80 % de la masse des fibres de cellulose chargées avec des particules de carbonate de calcium et le papier d'enveloppe présente une perméabilité à l'air selon ISO 2965:2019 d'au moins 50 cm3/(cm2·min·kPa) et de maximum 300 cm3/(cm2·min·kPa).
  2. Papier d'enveloppe selon la revendication 1, qui contient également, en plus des fibres de cellulose chargées avec des particules de carbonate de calcium, des fibres de cellulose non chargées avec des particules de carbonate de calcium et dont la part représente au moins 1 % et au maximum 95 %, de préférence au moins 10 % et au maximum 80 % et plus particulièrement de préférence au moins 20 % et au maximum 70 %, de la masse du papier d'enveloppe.
  3. Papier d'enveloppe selon la revendication 1 ou 2, dans lequel les fibres de cellulose chargées avec des particules de carbonate de calcium et, si elles existent, les fibres de cellulose non chargées avec des particules de carbonate de calcium, sont extraites au moins partiellement d'un bois de résineux, plus particulièrement d'épicéa, de peuplier ou de sapin, d'un bois de feuillu, plus particulièrement d'eucalyptus, de bouleau ou de hêtre, ou de chanvre, de lin, de jute, de sisal d'abaca ou de coton et/ou
    dans lequel les fibres de cellulose chargées avec des particules de carbonate de calcium et, si elles existent, les fibres de cellulose non chargées avec des particules de carbonate de calcium, sont extraites au moins partiellement d'une cellulose régénérée et plus particulièrement sont constituées de fibres de viscose, de fibres de modal, de Lyocell® ou de Tencel®.
  4. Papier d'enveloppe selon l'une des revendications précédentes, dans lequel les fibres de cellulose chargées avec des particules de carbonate de calcium se trouvent au moins partiellement dans la masse du papier d'enveloppe, dans lequel la part des fibres de cellulose chargées avec des particules de carbonate de calcium représente de préférence au moins 5 % et au maximum 80 % et plus particulièrement au moins 30 % et au maximum 70 % de la masse du papier d'enveloppe et/ou
    qui présente un revêtement et dans lequel les fibres de cellulose chargées avec des particules de carbonate de calcium se trouvent au moins partiellement dans le revêtement, dans lequel leur part, dans le cas où les fibres de cellulose chargées avec des particules de carbonate de calcium se trouvent exclusivement dans le revêtement du papier d'enveloppe, représente au moins 1 % et au maximum 30 %, de préférence au moins 2 % et au maximum 25 %, de la masse du papier d'enveloppe.
  5. Papier d'enveloppe selon l'une des revendications précédentes, dans lequel les particules de carbonate de calcium des fibres de cellulose chargées avec des particules de carbonate de calcium sont constituées de particules de carbonate de calcium précipitées, plus particulièrement de particules de carbonate de calcium précipitées de structure rhomboédrique et/ou
    dans lequel la masse des particules de carbonate de calcium représente, par rapport à la masse des fibres de cellulose chargées avec des particules de carbonate de calcium, au moins 10 % et au maximum 70 %, de préférence au moins 20 % et au maximum 60 %.
  6. Papier d'enveloppe selon l'une des revendications précédentes, qui contient en outre des matériaux de remplissage libres qui ne sont pas liés avec les fibres de cellulose, dans lequel la part des matériaux de remplissage libres représente de préférence au moins 1 % et au maximum 40 %, plus particulièrement de préférence au moins 5 % et au maximum 35 % et plus particulièrement de préférence au moins 10 % et au maximum 30 %, de la masse du papier d'enveloppe.
  7. Papier d'enveloppe selon la revendication 6, dans lequel les matériaux de remplissage libres sont constitués de carbonates, d'oxydes, d'hydroxydes et de silicates ou de combinaisons de ceux-ci et plus particulièrement de carbonate de calcium, de préférence de carbonate de calcium précipité, de carbonate de magnésium, d'hydroxyde de magnésium, d'hydroxyde d'aluminium, de dioxyde de titane, de talc, de kaolin, de kaolin calciné et de mélanges de ceux-ci et/ou
    dans lequel le rapport entre la masse des particules de carbonate de calcium contenues dans les fibres de cellulose chargées avec des particules de carbonate de calcium et la masse des particules de matériaux de remplissage libres dans le papier d'enveloppe représente de 5:95 à 100:0, de préférence de 10:90 à 80:20 et plus particulièrement de préférence de 10:90 à 50:50.
  8. Papier d'enveloppe selon l'une des revendications précédentes, qui contient en outre des sels combustibles dont la part représente de préférence au moins 0,3ù et au maximum 7 %, plus particulièrement de préférence au moins 0,5 % et au maximum 5 % et plus particulièrement de préférence au moins 0,5 % et au maximum 3 % de la masse du papier d'enveloppe, dans lequel
    les sels combustibles sont sélectionnés de préférence dans le groupe constitué de citrates, de malates, de tartrates, d'acétates, de nitrates, de succinates, de fumarates, de gluconates, de glycolates, de lactates, d'oxalates, de salicylates, de α-hydroxycarylates, de phosphates, de chlorures et d'hydrogénocarbonates et de mélanges de ceux-ci et sont sélectionnés, plus particulièrement de préférence dans le groupe constitué du citrate trisodique, du citrate tripotassique et de mélanges de ceux-ci.
  9. Papier d'enveloppe selon l'une des revendications précédentes, dans lequel au moins 95 % de sa surface présente un revêtement qui contient des particules de carbonate de calcium libres et/ou des fibres de cellulose chargées avec des particules de carbonate de calcium, dans lequel le revêtement comprend de préférence en outre un liant qui est conçu pour fixer les particules de carbonate de calcium libres et/ou les fibres de cellulose chargées avec des particules de carbonate de calcium au papier d'enveloppe, dans lequel le liant est sélectionné de préférence dans le groupe constitué d'amidon, plus particulièrement d'amidon fragmenté mécaniquement et réticulé chimiquement, de dérivés d'amidon, de carboxyméthylcellulose, de dérivés de cellulose, d'alcool polyvinylique, de galactomannane, de gomme arabique, d'alginates et de mélanges de ceux-ci et/ou
    dans lequel le revêtement comprend de préférence d'autres composants sélectionnés dans le groupe constitué de sels combustibles, de colorants, de substances aromatiques, d'agents humectants, plus particulièrement du glycérol ou de propylène-glycol ou de substances permettant de contrôler la viscosité et/ou
    dans lequel le revêtement se trouve de préférence sur le côté du papier d'enveloppe qui se trouve à l'extérieur sur l'article à fumer qui doit être fabriqué à partir de celui-ci et/ou dans lequel la masse surfacique du revêtement représente au moins 0,5 g/m2 et au maximum 10 g/m2, plus particulièrement de préférence au moins 1 g/m2 et au maximum 5 g/m2.
  10. Papier d'enveloppe selon la revendication 9, dans lequel, dans le revêtement, la masse des particules de carbonate de calcium libres et des particules de carbonate de calcium des fibres de cellulose chargées représente, dans le revêtement, au total au moins 1 % et au maximum 20 %, plus particulièrement de préférence au moins 2 % et au maximum 15 % de la masse du papier d'enveloppe revêtu, dans lequel le papier d'enveloppe contient, en outre, de préférence, dans la masse, des fibres de cellulose chargées avec des particules de carbonate de calcium, dans lequel la masse des fibres de cellulose chargées avec des particules de carbonate de calcium dans le papier d'enveloppe sans le revêtement représente de préférence au moins 1 % et au maximum 60 % de la masse du papier d'enveloppe et les particules de carbonate de calcium dans les fibres de cellulose chargées avec des particules de carbonate de calcium représentent au moins 10 % et au maximum 60 % de la masse des fibres de cellulose chargées avec des particules de carbonate de calcium.
  11. Papier d'enveloppe selon l'une des revendications précédentes, dans lequel le papier d'enveloppe est destiné à une cigarette et le papier d'enveloppe présente des motifs ou des structures, de préférence des bandes imprimées dans le sens de la circonférence, afin de réduire la tendance à l'inflammation de l'article à fumer, mesurée selon ISO 12863:2010 et/ou
    dont le poids surfacique est d'au moins 15 g/m2 et de maximum 150 g/m2, de préférence d'au moins 20 g/m2 et de maximum 120 g/m2 et plus particulièrement de préférence d'au moins 20 g/m2 et de maximum 40 g/m2, dans lequel un revêtement, s'il existe, est pris en compte dans le poids surfacique du papier d'enveloppe et/ou
    dont l'épaisseur est d'au moins 10 µm et de maximum 200 µm, de préférence d'au moins 15 µm et de maximum 120 µm et plus particulièrement de préférence d'au moins 30 µm et de maximum 100 µm, dans lequel un revêtement, s'il existe, est pris en compte dans l'épaisseur du papier d'enveloppe.
  12. Papier d'enveloppe selon l'une des revendications précédentes, dont la résistance à la traction est d'au moins 7 N/15 mm, de préférence d'au moins 8 N/15 mm et plus particulièrement de préférence d'au moins 10 N/15 mm et/ou
    dont la résistance à la traction est de maximum 100 N/15 mm, de préférence de maximum 80 N/15 mm et plus particulièrement de préférence de maximum 70 N/15 mm et/ou
    dont l'allongement à la rupture représente au moins 0,9 % et au maximum 3 %, plus particulièrement de préférence au moins 1 % et au maximum 2 % et/ou
    dont la capacité d'absorption d'énergie est d'au moins 3 J/m2 et de maximum 50 J/m2, de préférence d'au moins 3,5 J/m2 et de maximum 35 J/m2.
  13. Papier d'enveloppe selon l'une des revendications précédentes, dont la blancheur selon ISO 2470:2016 est d'au moins 80 % et plus particulièrement de préférence d'au moins 90 % et/ou
    dont l'opacité selon ISO 2471:2008 est d'au moins 70% et plus particulièrement de préférence d'au moins 80% et/ou
    dont la perméabilité à l'air selon ISO 2965:2019 est d'au moins 0 cm3/(cm2·min·kPa) et de maximum 300 cm3/(cm2·min·kPa), de préférence d'au moins 10 cm3/(cm2·min·kPa) et de maximum 250 cm3/(cm2·min·kPa) et plus particulièrement de préférence d'au moins 20 cm3/(cm2·min·kPa) et de maximum 150 cm3/(cm2·min·kPa).
  14. Stratifié comprenant un papier d'enveloppe selon l'une des revendications précédentes et un autre matériau, dont la conductivité thermique est supérieure à al conductivité thermique du papier d'enveloppe d'un facteur d'au moins deux, de préférence d'au moins quatre, dans lequel l'autre matériau est constitué de préférence d'une feuille d'aluminium.
  15. Article à fumer comprenant un matériau générant des aérosols et un papier d'enveloppe selon l'une des revendications 1 à 13, dans lequel
    le matériau générant des aérosols comprend de préférence du tabac, dans lequel l'article à fumer est de préférence une cigarette et le papier d'enveloppe est un papier à cigarette ou
    lors de son utilisation conforme à l'usage prévu, le matériau générant des aérosols est de préférence seulement chauffé mais non brûlé.
EP21715827.8A 2020-03-24 2021-03-24 Papier d'emballage pour articles à fumer avec un motif de cendres amélioré Active EP4127312B1 (fr)

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DE102020108071.9A DE102020108071A1 (de) 2020-03-24 2020-03-24 Umhüllungspapier für Rauchartikel mit verbessertem Aschebild
PCT/EP2021/057574 WO2021191277A1 (fr) 2020-03-24 2021-03-24 Papier d'emballage pour articles à fumer avec formation de cendres améliorée

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EP4127312B1 true EP4127312B1 (fr) 2024-04-17

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US5588446A (en) * 1993-06-02 1996-12-31 R. J. Reynolds Tobacco Company Cigarette with improved cellulosic substrate
DE10033979A1 (de) * 2000-07-13 2002-01-24 Voith Paper Patent Gmbh Verfahren zum Beladen von Fasern mit Calciumcarbonat
JP2003129399A (ja) 2001-10-26 2003-05-08 Oji Paper Co Ltd たばこ用巻紙
JP2003155696A (ja) 2001-11-16 2003-05-30 Oji Paper Co Ltd たばこ用巻紙
DE10325688A1 (de) 2003-06-06 2004-12-23 Voith Paper Patent Gmbh Verfahren zum Beladen einer Faserstoffsuspension mit Kalziumkarbonat und Anordnung zur Durchführung des Verfahrens
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DE102013109386B3 (de) 2013-08-29 2015-01-15 Delfortgroup Ag Effizient herstellbares Zigarettenpapier für selbstverlöschende Zigaretten, Verfahren zu seiner Herstellung sowie eine Zigarette
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CN104957755B (zh) * 2015-07-09 2016-11-30 川渝中烟工业有限责任公司 一种提高造纸法再造烟叶中碳酸钙留着率的方法

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EP4127312A1 (fr) 2023-02-08
US20230136404A1 (en) 2023-05-04
KR20220151691A (ko) 2022-11-15
BR112022017585A2 (pt) 2022-10-18
CN115315555A (zh) 2022-11-08
JP2023520152A (ja) 2023-05-16
WO2021191277A1 (fr) 2021-09-30

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