WO2021191277A1 - Wrapper paper for smoking articles, with improved ash formation - Google Patents
Wrapper paper for smoking articles, with improved ash formation Download PDFInfo
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- WO2021191277A1 WO2021191277A1 PCT/EP2021/057574 EP2021057574W WO2021191277A1 WO 2021191277 A1 WO2021191277 A1 WO 2021191277A1 EP 2021057574 W EP2021057574 W EP 2021057574W WO 2021191277 A1 WO2021191277 A1 WO 2021191277A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wrapping paper
- calcium carbonate
- carbonate particles
- loaded
- mass
- Prior art date
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Classifications
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- 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
-
- 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
-
- 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
-
- 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
- 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
- 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
-
- 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
Definitions
- the invention relates to a wrapping paper for smoking articles which contains cellulose fibers loaded with filler particles which give the paper particularly favorable properties.
- the ashes of a smoking article made from this wrapping paper have a better appearance.
- a common smoking article comprises a cylindrical tobacco rod containing an aerosol forming material, typically tobacco or a tobacco-based material, encased in a wrapping material.
- the wrapping material comprises a paper, that is to say a web-like material which contains cellulose fibers.
- a smoking article can comprise a filter that is wrapped in a filter wrapping paper, and a tipping paper that wraps around the filter and part of the tobacco rod at the same time and thus connects the filter and the tobacco rod to one another.
- the aerosol-forming material When the smoking article is used, the aerosol-forming material is heated or burned so that an aerosol is formed which, when the smoking article is used, flows through the smoking article and is inhaled by the consumer.
- the smoking article can also comprise components that convey 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 it partially loses its mechanical stability, which is why the optical appearance of the smoking article changes.
- This appearance of a used or in use smoking article and in particular its tobacco rod is referred to as an ash image. From the consumer's point of view, it is a sign of a high quality of the smoking article if it has a good ash appearance, that is, if the tobacco rod essentially retains its cylindrical shape after being burned or heated, of a uniform white color and no dark particles, for example tobacco particles or their ashes, protrude through the wrapping material.
- the basis weight of the wrapping paper can be increased or fire salts such as trisodium citrate or tripotassium citrate can be added or their content increased.
- these possibilities have the disadvantage that they increase the proportion of non-tobacco materials in the smoking article and thus can negatively change the taste of the smoking article.
- wrapping paper should be understood to 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 available that gives the smoking article a good ash appearance without the need to increase the mass of the wrapping paper significantly or add unusual components to the wrapping paper.
- the wrapping paper contains cellulose fibers which are loaded with calcium carbonate particles.
- Cellulose fibers and calcium carbonate particles are common components of wrapping papers for smoking articles, however, 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” in order to distinguish them from the calcium carbonate particles with which the cellulose fibers are loaded, that is, they are connected.
- Such cellulose fibers loaded with calcium carbonate particles can be for example, by precipitation of the calcium carbonate with the simultaneous presence of the cellulose fibers with appropriate guidance of the precipitation process.
- the wrapping paper according to the invention comprises cellulose fibers loaded with calcium carbonate particles, the mass of the cellulose fibers loaded with calcium carbonate particles being at least 1% of the weight of the wrapping paper and the calcium carbonate particles in the cellulose fibers loaded with calcium carbonate particles at least 5% and at most 80% of the mass of the calcium carbonate particles loaded Make up pulp fibers.
- the inventor assumes that the calcium carbonate particles connected to the cellulose fibers form a framework that remains after the thermal degradation of the cellulose 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 can. In this way, the overall ash appearance of the smoking article is improved.
- the free calcium carbonate particles do not form such framework-like structures and therefore do not contribute to the same extent to improving the ash structure. Therefore, with a comparable ash pattern, the mass of calcium carbonate particles in the wrapping paper can be reduced by using pulp fibers loaded with calcium carbonate particles, or the mass of the wrapping paper can be reduced overall. This also reduces the influence of the wrapping paper on the taste of the smoking article.
- the wrapping paper according to the invention offers particular advantages if it has a high level of air permeability.
- a conventional wrapping paper with high air permeability has more and larger pores and is therefore even more difficult to form a mechanically stable framework during thermal degradation, which is why the ash appearance is often unacceptable. This effect can be largely compensated for by the cellulose fibers loaded with calcium carbonate particles in the wrapping paper according to the invention.
- all of the pulp fibers in the wrapping paper are loaded with calcium carbonate particles.
- the wrapping paper contains not only the cellulose fibers loaded with calcium carbonate particles but also cellulose fibers that are not loaded with calcium carbonate particles.
- the proportion of such cellulose fibers is preferably at least 1% and at most 95%, particularly preferably at least 10% and at most 80% and very particularly preferably at least 20% and at most 70%, each based on the mass of the wrapping paper.
- Both the cellulose fibers and the cellulose fibers loaded with calcium carbonate particles can be made from coniferous woods such as spruce, pine or fir, from hardwoods such as eucalyptus tus, 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 of various origins can be used.
- the wrapping paper according to the invention contains at least i% pulp fibers loaded with calcium carbonate particles.
- the wrapping paper can be uncoated or coated.
- the pulp fibers loaded with calcium carbonate particles can be in the bulk of the wrapping paper or in an optional coating on the wrapping paper. If there are cellulose fibers loaded with calcium carbonate particles in the mass of the wrapping paper, the proportion of cellulose fibers loaded with calcium carbonate particles is preferably higher and is at least 5% and at most 80% and particularly preferably at least 30% and at most 70%, each based on the mass of the Wrapping paper. If the cellulose fibers loaded with calcium carbonate particles are exclusively in the optional coating of the wrapping paper, then the proportion of cellulose fibers loaded with calcium carbonate particles is preferably at least 1% and at most 30% and particularly preferably at least 2% and at most 25%, each based on the mass of the wrapping paper.
- a high proportion of cellulose fibers loaded with calcium carbonate particles makes it possible to reduce the proportion of free calcium carbonate particles and at the same time to improve the ash structure. It is even possible that, through the use of the cellulose fibers loaded with calcium carbonate particles, the total content of the calcium carbonate particles in the wrapping paper can be reduced without deteriorating the ash appearance.
- the cellulose fibers loaded with calcium carbonate particles form fewer hydrogen bonds, however, so that the tensile strength of the wrapping paper can decrease overall. Therefore, the amount of pulp fibers loaded with calcium carbonate particles in the wrapping paper cannot be chosen arbitrarily high, especially when the pulp fibers are loaded with a large amount of calcium carbonate particles.
- the cellulose fibers loaded with calcium carbonate particles are preferably obtained from hardwoods such as eucalyptus, birch or beech. These cellulose fibers are generally less mechanically stressed 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 on the cellulose fibers in a precipitation process.
- the mass of the calcium carbonate particles based on the mass of the pulp fibers loaded with calcium carbonate particles is at least 5% and at most 80% in the wrapping paper according to the invention. However, it is preferably at least 10% and at most 70% and very particularly preferably at least 20% and at most 60%. In the preferred intervals, there is a particularly favorable compromise between the desired improvement in the ash pattern and the undesired reduction in tensile strength.
- the wrapping paper can also contain free fillers that are not associated with 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%, each 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. With the free fillers there is also the risk that they will settle as dust in further processing processes, for example when producing a smoking article from the wrapping paper, and thus shorten the necessary cleaning intervals for the machines. In the preferred intervals, the advantages of using free fillers predominate.
- 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 very particularly preferred.
- the ratio between the mass of calcium carbonate particles contained in the pulp fibers loaded with calcium carbonate particles and the mass of free filler particles in the wrapping paper can be important for adjusting the ash appearance in relation to other properties such as whiteness, opacity and tensile strength.
- the ratio of the mass of calcium carbonate particles contained in the pulp fibers loaded with calcium carbonate particles and the mass of free filler particles in the wrapping paper is preferably 5:95 to 100: 0, particularly preferably 10:90 to 80:20 and whole it is particularly preferably 10:90 to 50:50.
- the wrapping paper can also contain fire salts.
- the fire salts influence the rate of thermal degradation of the wrapping paper and can also help to improve the ash appearance, because they sometimes act 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.
- Fire salts are preferably used in each wrapping paper that wraps the tobacco rod.
- the proportion of fire salts in the wrapping paper can be chosen variably, the proportion preferably being 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% carries, each based on the mass of the wrapping paper.
- the fire salts can preferably be selected from the group consisting of citrates, malates, tartrates, acetates, nitrates, succinates, fumarates, gluconates, glycolates, lactates, oxyalates, 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 essentially provided over its entire surface with a coating that contains free calcium carbonate particles and / or cellulose fibers loaded with calcium carbonate particles.
- “Coated over the entire area” means that a full-area coating is intended or at least 95% of the area is coated.
- a suitably selected coating can further improve the ash appearance 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 using methods known from the prior art, such as, for example, 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.
- Such calcium carbonate particles which do not belong to the calcium carbonate particles of the loaded cellulose fibers, are referred to as free calcium carbonate particles, as is the case with 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%, each 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.
- the above-mentioned coating corresponds to the applied composition in the dried state, ie when, in particular, the solvent has volatilized.
- the composition should contain a binder in order to fix the free calcium carbonate particles to the wrapping paper. This binder then also remains in the coating formed by the application of the composition.
- a binding agent 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, carboxymethyl cellulose, cellulose derivatives, polyvinyl alcohol, galactomannan, gum arabic, alginates and mixtures thereof.
- the starch is very particularly preferably a mechanically fragmented and chemically crosslinked starch because it is not soluble in water in the chemical sense and therefore penetrates less into the paper structure and thus less reduces the air permeability of the wrapping paper.
- the person skilled in the art can choose the amount of binder from experience, in particular with regard to the requirements of the application process.
- the composition can comprise further components which the person skilled in the art can suitably choose, including, for example, fire salts, dyes, flavorings, 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. However, the composition is preferably applied to the side that is on the outside of the smoking article made therefrom. This side is generally already known in the manufacture of the wrapping paper and in most cases the side facing away from the wire of the paper machine. The composition is therefore preferably applied to the side of the wrapping paper facing away from the wire of the paper machine, which side is also referred to as the top side.
- the mass per unit area 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 cellulose fibers in the coating taken together is 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 also contains pulp fibers loaded with calcium carbonate particles, the mass of the pulp fibers loaded with calcium carbonate particles in the wrapping paper without the coating preferably at least 1% and at most 70%, particularly preferably at least 1% and at most 60% of the mass of the wrapping paper piers, and the calcium carbonate particles in the calcium carbonate particles NEN cellulose fibers make up at least 10% and at most 6o% of the mass of the cellulose 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 a further material with a thermal conductivity that exceeds that of the wrapping paper by a factor of at least two, preferably at least four.
- the further material of the laminate is formed by an aluminum foil.
- Such laminates can primarily be used in smoking articles in which the aerosol-forming material is only heated but not burned in order to prevent the smoking article from being lit and smoked like an ordinary cigarette.
- 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 in accordance with 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 as part of 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.
- a coating if present, is part of the thickness of the wrapping paper.
- the mechanical properties of the wrapping paper according to the invention can be important for the production 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 expenditure of material and energy in papermaking 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 above all by increasing the weight per unit area and increasing the proportion of cellulose fibers, as well as by more intensive grinding of the cellulose fibers.
- the wrapping paper has a certain stretchability.
- the elongation at break 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 visual appearance and also for the ash appearance. It is measured in accordance with 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 choosing the free fillers; in particular, the whiteness can be increased considerably with titanium dioxide.
- the opacity of the wrapping paper is also important for the visual appearance.
- a high opacity is generally favorable 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 preferably 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.
- its air permeability is important. In such applications, for example, when using the smoking article, 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 air permeability of the wrapping paper according to the invention is preferably at least 0 cm 3 / (cm 2 -min-kPa) and at most 300 cm 3 / (cm 2 -min-kPa), particularly preferably at least 10 cm 3 / (cm 2 -min-kPa ) and at most 250 cm 3 / (cm 2 -min-kPa) and very particularly preferably at least 20 cm 3 / (cm 2 -min-kPa) and at most 150 cm 3 / (cm 2 -min-kPa).
- the wrapping paper is coated, its air permeability is lower and carries at most 120 cm 3 / (cm 2 -min-kPa), particularly preferably at most 100 cm 3 / (cm 2 -min-kPa) and very particularly preferably at most 80 cm 3 / (cm 2 -min-kPa).
- the wrapping paper according to the invention comprises pulp fibers loaded with calcium carbonate particles, the mass of the pulp fibers loaded with calcium carbonate particles being at least 10% of the mass of the wrapping paper and the calcium carbonate particles in the pulp fibers loaded with calcium carbonate particles being at least 20% and at most 80% of the Make up the mass of the cellulose 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 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 wraps 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.
- FIGURES 1 shows an example of an electron microscope image of coarse
- Calcium carbonate particles loaded cellulose fibers the calcium carbonate particles making up about 20% of the mass of the cellulose fibers loaded with calcium carbonate particles.
- Calcium carbonate particles loaded cellulose fibers the calcium carbonate particles making up about 20% of the mass of the cellulose fibers loaded with calcium carbonate particles.
- Fig. 3 shows the ash picture of three filter cigarettes made from a wrapping paper not according to the invention.
- FIG. 4 shows the ash pattern of three filter cigarettes made from a wrapping paper according to the invention.
- a total of 14 wrapping papers according to the invention labeled A to K and X to Z, were produced, the composition of the wrapping papers being given in Table 1.
- "SW” in% means the proportion of pulp fibers from coniferous woods
- "HW” in% the proportion of pulp fibers from hardwoods
- "CF” in% the proportion of pulp fibers loaded with calcium carbonate particles
- "FI” in% the proportion free fillers. The percentages are based on the weight of the wrapping paper.
- the pulp fibers from softwood and hardwood are standard products available on the market.
- the cellulose fibers loaded with calcium carbonate particles were obtained from Schaefer Kalk. All of the free filler was formed by precipitated calcium carbonate particles.
- the mass of the calcium carbonate particles in the pulp fibers loaded with calcium carbonate particles is indicated in table 1 under “CCP” in%, based on the mass of the cellulose fibers loaded with calcium carbonate particles.
- the size of these particles is also specified as “fine” or “coarse”.
- FIG. 1 shows an electron microscope image of pulp fibers loaded with coarse calcium carbonate particles
- FIG. 2 shows an electron microscope image of cellulose fibers loaded with fine calcium carbonate particles, as they were both used to produce some wrapping papers according to the invention.
- the mass fraction of calcium carbonate particles in the cellulose fibers loaded with calcium carbonate particles from FIGS. 1 and 2 was about 17.3%.
- the pulp fibers were formed by pulp fibers from eucalyptus.
- the wrapping paper X was identical to the wrapping paper REF, and the wrapping papers Y and Z were identical to the wrapping paper G.
- the wrapping paper Y was coated over the entire surface with a composition of 89% water, 5.5% mechanically fragmented and chemically crosslinked starch and 5.5% free calcium carbonate particles, the percentages being based on the mass of the composition.
- the wrapping papers X and Z were completely coated with a composition of 95.5% water, 1% mechanically fragmented and chemically crosslinked starch and 3.5% fibers loaded with calcium carbonate particles, the percentages being based on the mass of the composition. After the composition had been applied and dried, a mass of about 2 g / m 2 remained on each of the wrapping papers.
- the mechanically fragmented, chemically crosslinked starch can be obtained, for example, from Emsland-Starke GmbH.
- smoking articles in the form of filter cigarettes with a diameter of about 7.8 mm and a length of 83 mm were produced.
- the tobacco used was an American blend and the wrapping papers each wrapped the tobacco.
- the ash appearance of these smoking articles was evaluated by an image analysis method. In doing so, three of each cigarette were lit in a vertical position and the tobacco had to be completely smoldered. A digital image was then taken of each cigarette under constant light conditions in front of a neutral background. 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 formed from the images of three cigarettes in each case.
- FIG. 3 shows the ash pattern of three filter cigarettes made from the wrapping paper REF, which is not according to the invention.
- FIG. 4 shows the ash pattern of three filter cigarettes which were manufactured from the wrapping paper K according to the invention. Even without quantifying the ash pattern 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 wrapping paper REF not according to the invention in order to be able to clearly show the positive effect of the cellulose fibers loaded with calcium carbonate particles.
- the examples are therefore not to be understood as a restriction of the invention and the person skilled in the art is able to produce wrapping papers according to the invention with, for example, different composition, different weight per unit area, different thickness, 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 wrapping paper REF not according to the invention in terms of weight per unit area, 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 smaller than in the case of the wrapping paper REF, which is not according to the invention. This is caused by the cellulose fibers loaded with calcium carbonate particles, since the calcium carbonate particles on the cellulose fibers prevent 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 person skilled in the art can of course reduce the air permeability of the wrapping papers A to K, for example by more intensive grinding of the cellulose fibers, and thus set the same value as for the wrapping paper REF. It is to be expected that the ash index will then decrease even further and thus the ash structure will 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 wrapping paper REF not according to the invention and than the uncoated wrapping papers A to K according to the invention, which is a further advantage of these embodiments.
- the wrapping papers according to the invention can achieve a significant improvement in the ash appearance without adversely affecting the other properties of the wrapping paper and without significantly increasing the mass of the wrapping paper or adding unusual components to the wrapping paper.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022555838A JP2023520152A (en) | 2020-03-24 | 2021-03-24 | Wrapping paper for smoking articles with improved ash formation |
EP21715827.8A EP4127312B1 (en) | 2020-03-24 | 2021-03-24 | Wrapping paper for smoking articles with improved ash pattern |
US17/912,377 US20230136404A1 (en) | 2020-03-24 | 2021-03-24 | Wrapper Paper for Smoking Articles, with Improved Ash Formation |
BR112022017585A BR112022017585A2 (en) | 2020-03-24 | 2021-03-24 | WRAPPING PAPER FOR SMOKING ARTICLES WITH IMPROVED ASH FORMATION |
CN202180024185.8A CN115315555A (en) | 2020-03-24 | 2021-03-24 | Wrapper paper for smoking articles with improved ash formation |
KR1020227035444A KR20220151691A (en) | 2020-03-24 | 2021-03-24 | Wrapper Paper for Smoking Articles with Improved Reshaping |
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DE102020108071.9A DE102020108071A1 (en) | 2020-03-24 | 2020-03-24 | Wrapping paper for smoking articles with improved ash appearance |
DE102020108071.9 | 2020-03-24 |
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WO2021191277A1 true WO2021191277A1 (en) | 2021-09-30 |
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US (1) | US20230136404A1 (en) |
EP (1) | EP4127312B1 (en) |
JP (1) | JP2023520152A (en) |
KR (1) | KR20220151691A (en) |
CN (1) | CN115315555A (en) |
BR (1) | BR112022017585A2 (en) |
DE (1) | DE102020108071A1 (en) |
WO (1) | WO2021191277A1 (en) |
Cited By (1)
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CN114875720A (en) * | 2022-06-15 | 2022-08-09 | 上海烟草集团有限责任公司 | Tobacco type lining base paper and preparation method and application thereof |
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- 2020-03-24 DE DE102020108071.9A patent/DE102020108071A1/en active Pending
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2021
- 2021-03-24 US US17/912,377 patent/US20230136404A1/en active Pending
- 2021-03-24 KR KR1020227035444A patent/KR20220151691A/en unknown
- 2021-03-24 JP JP2022555838A patent/JP2023520152A/en active Pending
- 2021-03-24 EP EP21715827.8A patent/EP4127312B1/en active Active
- 2021-03-24 WO PCT/EP2021/057574 patent/WO2021191277A1/en unknown
- 2021-03-24 BR BR112022017585A patent/BR112022017585A2/en unknown
- 2021-03-24 CN CN202180024185.8A patent/CN115315555A/en active Pending
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US20070151681A1 (en) * | 2004-09-17 | 2007-07-05 | Klaus Doelle | Method and device for loading a fibrous stock suspension |
US20180092397A1 (en) * | 2015-04-17 | 2018-04-05 | Delfortgroup Ag | Cigarette Paper with High Short-Fiber Fraction |
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CN114875720A (en) * | 2022-06-15 | 2022-08-09 | 上海烟草集团有限责任公司 | Tobacco type lining base paper and preparation method and application thereof |
CN114875720B (en) * | 2022-06-15 | 2023-09-19 | 上海烟草集团有限责任公司 | Tobacco type lining base paper and preparation method and application thereof |
Also Published As
Publication number | Publication date |
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EP4127312A1 (en) | 2023-02-08 |
DE102020108071A1 (en) | 2021-09-30 |
KR20220151691A (en) | 2022-11-15 |
US20230136404A1 (en) | 2023-05-04 |
EP4127312B1 (en) | 2024-04-17 |
BR112022017585A2 (en) | 2022-10-18 |
JP2023520152A (en) | 2023-05-16 |
CN115315555A (en) | 2022-11-08 |
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