Tipping paper with thermally expandable particles

Abstract

The present invention relates to a tipping paper (1) that can be provided with at least one protrusion (10) using the effect of heat, said tipping paper comprising thermally expandable particles provided within the substrate of the tipping paper (1) or in the form of an imprint or coating (2), said imprint or coating (2) being provided on the substrate of the tipping paper (1).

Description

[Technical field]

[0001] The present invention relates to a mouthpiece lining paper having thermally expandable particles.

[0002] The present invention relates to mouthpiece lining papers in particular for cigarettes and non-combustion heating consumer articles, or generally to mouthpieces for aerosol generating consumer articles. [Background technology]

[0003] Mouthpiece lining paper, often referred to as "tip paper" or "tip" for short, is the part of an aerosol-generating consumer article that comes into contact with a person's lips when smoking a filtered cigarette or heating a non-combustion heating consumer article. The mouthpiece lining paper surrounds the filter section and usually protrudes slightly in the longitudinal direction of the consumer article into the longitudinal region of the tobacco rod or aerosol-generating substrate, where it surrounds the wrapping of the tobacco paper or aerosol-generating substrate. The mouthpiece lining paper forms the outermost wrapping of the aerosol-generating consumer article and, in contrast to tobacco paper, is not burned when the consumer article is used.

[0004] The mouthpiece lining paper is most often paper in nature, but can also be a foil or a composite material formed from several layers of different materials.

[0005] Mouthpiece lining papers often include an imprint, which may be an imitation of cork, for example, but mouthpiece lining papers in which the lip contact area is white are also used.

[0006] US Patent No. 9,307,789 teaches the application of a lacquer structure to a mouthpiece lining paper. The structured application of lacquer requires a precisely operating application device. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] U.S. Pat. No. 9,307,789 Summary of the Invention

[0008] It is an object of the present invention to provide a structured mouthpiece lining paper and an improved method for producing a structured mouthpiece lining paper.

[0009] To achieve this goal, a mouthpiece lining paper according to claim 1 is proposed.

[0010] The mouthpiece lining paper includes thermally expandable particles that can be expanded by the action of heat to generate a raised structure or at least ridges.

[0011] In one embodiment, the thermally expandable particles are included in a substrate of the mouthpiece lining paper.

[0012] The substrate is preferably paper, in particular from 30 to 60 g / m 2 , particularly preferably 30 to 50 g / m 2 This is what is called base paper having a basis weight of 100 g.

[0013] Less preferably, in addition to the base paper, the substrate can contain a foil, in particular made from cellulose hydrate. Less preferably, the substrate can consist of a foil, in particular made from cellulose hydrate, or can be present as a laminate of several foils. In these cases, the thermally expandable particles can be contained in the foil.

[0014] Preferably, the mouthpiece lining paper is in fact paper and the thermally expandable particles are contained in the paper, particularly in that they are encapsulated in the fiber matrix of the paper during the paper making process.

[0015] In a second embodiment, the thermoexpanding particles are included in the printing or coating: They can be applied by means of a non-film-forming printing ink or a film-forming clear lacquer or a film-forming colored lacquer.

[0016] The particles are preferably expanded by the action of heat when the web of mouthpiece lining paper is conveyed along the hot cylinder or hot embossing roller of a hot stamping machine.

[0017] In a first embodiment, only heating is performed, so that, in contrast to the conventional use of hot stamping machines, no hot stamping foil is transferred.

[0018] In a second embodiment, a hot stamping foil is transferred in addition to or in conjunction with the application of heat. As a result, the hot stamping foil is present on the raised areas formed by the expanded particles. The foil optically accentuates the raised areas.

[0019] The expansion can also be carried out using other machines that allow targeted or structured heating of the web of mouthpiece lining paper, for example a thermal printer, in particular a thermal Braille printer.

[0020] In another embodiment, the heating is applied to the mouthpiece lining paper when it is already present on the aerosol-generating consumer product. The mouthpiece lining paper forms the outer layer of the consumer article. The heating is preferably applied before the consumer article is packaged for sale. In another embodiment, the heating is applied when the consumer article is used by the consumer, for example by heating the consumer article in a non-combustion heating device.

[0021] In one embodiment, a print or coating containing thermally expandable particles is applied onto a continuous surface of the mouthpiece lining paper, and the structure is then formed by heating with a structured heating surface.

[0022] In one embodiment, the printing or coating with thermally expandable particles is applied to the mouthpiece lining paper in a structured manner, where the subsequent structure can also be formed by heating with a flat heated surface or by heating the aerosol-generating consumable article comprising the mouthpiece lining paper.

[0023] In one embodiment, a continuous area is printed or coated, which extends in the form of a band along the entire side of the mouthpiece lining paper, and an annular area having thermally expandable particles is present on the aerosol-generating product.

[0024] Expansion is preferably carried out on a continuously moving band of mouthpiece lining paper provided with a thermally expanded structure between two rollers (an embossing roller and a counter pressure roller) by transferring the embossed structure of the embossing roller to the mouthpiece lining paper by heat and pressure.

[0025] In one embodiment, the expandable particles are applied by means of a lacquer and are thus included in a lacquer layer on the mouthpiece lining paper.

[0026] The term lacquer includes all kinds of film-forming substances.

[0027] In a first embodiment, the lacquer is a clear lacquer which hardens to form a clear lacquer layer.

[0028] It is particularly preferred that the clear lacquer is a nitrocellulose lacquer.

[0029] The clear lacquer preferably comprises nitrocellulose or ethylcellulose, thermoexpandable particles and one or more solvents selected from the group of solvents comprising ethanol, ethyl acetate, isopropanol. The mentioned solvents can be present in the form of an aqueous solution, such that the paint comprises thermoexpandable particles, nitrocellulose or ethylcellulose, an organic solvent and water. The clear lacquer can also comprise effect pigments.

[0030] The clear lacquer composition preferably has a coating weight of 0.25 g / m 2 From 2g / m 2 , particularly preferably 0.5 g / m 2 From 1 g / m 2 is applied in an amount of

[0031] In a second embodiment, the lacquer is a pigmented lacquer which hardens to form a pigmented lacquer layer.

[0032] The colored lacquer comprises nitrocellulose or ethylcellulose, thermally expandable particles and color pigments, and one or more solvents selected from the group of solvents comprising ethanol, ethyl acetate, isopropanol. The mentioned solvents can be in the form of an aqueous solution, so that the colored lacquer comprises nitrocellulose or ethylcellulose, color pigments, and organic solvents and water. The colored lacquer can also contain additives and / or fillers.

[0033] The coloured lacquers may also contain effect pigments.

[0034] The pigmented lacquer composition preferably has a density of 0.25 g / m 2 From 8g / m 2 , particularly preferably 1 g / m 2 From 4g / m 2 is applied in an amount of

[0035] The pigmented lacquer is applied to the surface in the form of a monochromatic coating. The coating can be present as bands or multiple bands spaced apart from one another. The pigmented lacquer composition preferably has a viscosity of 8 to 16 seconds, in particular 10 to 14 seconds. The viscosity value is determined using a flow cup test with a cup diameter of 4 mm (ISO cup 4 mm according to EN ISO 2431 version 1993-02-15).

[0036] The clear or pigmented lacquers are preferably applied by gravure printing, in particular rotogravure printing.

[0037] The lacquer layer is preferably applied in one layer, more preferably in two layers.

[0038] The lacquer is preferably applied directly to the base paper of the mouthpiece lining paper.

[0039] The base paper is preferably 30 to 60 g / m 2 , particularly preferably 30 to 50 g / m 2 The sheet has a basis weight of 1.0 g.

[0040] The lacquer is preferably applied to the untreated surface of the base paper, which is therefore preferably not coated.

[0041] In one embodiment, the coating is in the form of one or more bands of colored lacquer present on a white base paper. The coated mouthpiece lining paper preferably has at least one white area and one area with a colored layer, which preferably extend in the form of bands in the circumferential direction of the aerosol-generating consumable article.

[0042] In one embodiment, the expandable particles are applied by means of a water-based printing ink and are thus included in the print onto the mouthpiece lining paper.

[0043] The aqueous printing inks preferably have a viscosity of from 15 to 60 seconds, particularly preferably from 16 to 35 seconds and in particular from 16 to 21 seconds.

[0044] The water-based printing ink preferably has a density of 0.25 g / m 2 From 8g / m 2 , particularly preferably 1 g / m 2 From 4g / m 2 is applied in an amount of

[0045] The mouthpiece lining paper preferably includes a color imprint that mimics the appearance of cork.

[0046] As already explained, the colour imprint is in one embodiment a coloured lacquer layer.

[0047] In a second embodiment, the color imprint can be a non-film-forming coating or printing, for example in the form of a colored ink or printing ink. As mentioned above, a transparent lacquer can be applied onto the colored coating. The transparent lacquer layer is preferably continuous over the entire mouthpiece lining paper or aligned in one or several band-like colored layers. The expandable particles can be included in the colored or printing ink and / or the transparent lacquer layer.

[0048] The application of the pigmented inks and / or lacquers is carried out on a continuously moving material web of base paper, which after application is preferably moved through a drying device.

[0049] Heated dryers, in particular hot air dryers and / or heated rollers, are preferably used as drying devices. Less preferably, infrared emitters can also be used in addition or as an alternative.

[0050] Drying is preferably carried out at a temperature below the expansion temperature of the particles.

[0051] If the expandable particles are contained in a print or lacquer layer applied in a limited area or in a structured manner, drying can also be carried out above the expansion temperature, resulting in the formation of ridges during drying.

[0052] After the lacquer layer has dried, the material web is wound onto a bobbin or fed directly to an embossing device or hot foil machine to produce the thermally expanded structure. After the structure has been produced, the material web is wound onto a bobbin or the structured material web is fed to a cigarette making machine.

[0053] The mouthpiece lining paper can be provided with foil elements of a hot foil machine, in particular with metal foil elements, which are applied in particular as thin bands or logos.

[0054] Hot stamping is performed according to known methods in that the foil element is applied to the mouthpiece lining paper by pressure and heat from the transfer element, the area of ​​the mouthpiece lining paper provided with the foil element is heated more in the hot stamping process, as a result of which the thermoexpandable particles located underneath the foil element expand.

[0055] The present invention also provides an apparatus for producing a mouthpiece lining paper, comprising: a machine for printing or coating the mouthpiece lining paper with printing inks or lacquers; and a machine for hot stamping the mouthpiece lining paper.

[0056] If desired, the machine for coating the mouthpiece lining paper with ink can be arranged upstream of the machine for coating the mouthpiece lining paper with lacquer, or the machine for coating the mouthpiece lining paper with lacquer can also be equipped with means for coating with an additional printing ink.

[0057] Optionally, there may be a machine for printing the mouthpiece lining paper, which prints a multi-color logo on the mouthpiece lining paper.

[0058] The mouthpiece lining paper is moved as a band through the respective machine and the application of printing inks or lacquers and hot stamping is preferably carried out continuously in the longitudinal direction of the band.

[0059] In an advantageous embodiment, the band of mouthpiece lining paper is not transferred from one machine to the next, but rather is wound onto a bobbin after each machine and transferred to the next machine.

[0060] The band moving through the machine for coating the mouthpiece lining paper with printing ink or lacquer is made up of several mouthpiece lining papers aligned transversely to the direction of movement, the direction of the mouthpiece lining paper transverse to the direction of movement, i.e. along the width of the band, being later aligned with the longitudinal direction of the consumer article.

[0061] The machine for printing or coating the mouthpiece lining paper with printing inks or lacquers preferably comprises a cutting device which cuts the band longitudinally after the printing ink or lacquer layer has been applied, resulting in at least two narrower bands of mouthpiece lining paper coated with printing inks or lacquers, each of the narrower bands being wound up on a bobbin.

[0062] These bobbins of narrower bands are preferably fed into a machine for hot stamping the mouthpiece lining paper.

[0063] Particularly suitable thermoexpandable particles are expandable microspheres, which expand when exposed to heat to form hollow spheres with a larger volume. Expandable microspheres can contain gas or liquid, where gas expands under the action of heat, or liquid evaporates with an increase in volume. The deformation is irreversible and persists even after cooling.

[0064] The thermally expandable particles are preferably thermoplastic polymer particles or gel particles.

[0065] The particles are preferably expanded using a contact technique, where the raised structure of the hot surface is transferred to the mouthpiece lining paper as a raised structure, in contrast to conventional embossing processes where the raised structure of the surface is transferred to the mouthpiece lining paper as depressions.

[0066] The expansion of the particles can also be carried out without contact, for example by heating the partial areas to be expanded by means of a laser beam.

[0067] The expandable particles preferably have an expansion temperature of from 100 to 250°C.

[0068] The average particle size of the expandable particles in the unexpanded state is preferably between 1 μm and 50 μm. When expanded, their diameter preferably increases by a factor of 5 to 15.

[0069] In addition to polymeric hollow microspheres, inorganic particles such as expandable mica, expandable graphite, perlite, etc. can be used.

[0070] In one embodiment, the mouthpiece lining paper is selectively heated by a laser beam. As a result, the mouthpiece lining paper can be provided with a structured surface on the cigarette machine or on the finished cigarette by the laser immediately after printing or coating or before packaging. The laser can be used to form thin lines, logos, codes, QR codes or company symbols (coats of arms, identification marks, etc.) as raised structures in the areas of the mouthpiece lining paper that contain thermally expandable particles. The laser can be moved line by line on the surface of the mouthpiece lining paper, and the laser beam then only hits or is turned on at the raised surfaces. The laser beam can also be moved on the surface of the mouthpiece lining paper according to a predetermined path along two coordinates. If the laser beam is irradiated on a continuously moving web of the mouthpiece lining paper, the movement of the laser beam transverse to the conveying direction of the mouthpiece lining paper can be sufficient.

[0071] The path of the laser beam and / or the on-off pattern of the laser beam can be individually programmed so that ridges of different shapes can be formed in the mouthpiece lining paper. In one embodiment, ridges of the mouthpiece lining paper that follow each other in the web direction can differ from each other with respect to their shape or position, or with respect to the meaning of codes, if present. In one embodiment, ridges of the mouthpiece lining paper that are aligned transversely to the web direction can differ from each other with respect to their shape or position, or with respect to the meaning of codes, if present.

[0072] In another embodiment, the mouthpiece lining paper is provided with a lacquer or a water-based printing ink only in a limited area, and the thermally expandable particles are included in the lacquer or the printing ink. As a result, the expandable particles are present only in a limited area on the mouthpiece lining paper, so that the mouthpiece lining paper has at least one area with expandable particles and at least one area without expandable particles. At least one of the areas can be present as a symbol, code or pattern. The lacquer or water-based printing ink can be transparent or can be the color of the background or can be the color of the area of ​​the mouthpiece lining paper that is not provided with this lacquer or this water-based printing ink. As a result, the area with expandable particles cannot be optically distinguished from the area without expandable particles. After heating, the area with expandable particles stands out in relief from the other areas, so that the area becomes tactile and, therefore, possibly visually distinguishable simply by heating.

[0073] Heating can occur before, during, or after use, on the mouthpiece lining paper web material, on the cigarette machine, or on the finished aerosol-generating consumer article.

[0074] This embodiment makes it possible to implement a security feature that is initially unrecognizable and can be made detectable by heating, in order to detect counterfeit products that do not have this security feature. [Brief description of the drawings]

[0075] The invention is explained below with the aid of the drawings:

[0076] [Figure 1] 1 illustrates the application of an exemplary mouthpiece lining paper according to the present invention to a filtered cigarette. [Diagram 2] 1 illustrates the application of an exemplary mouthpiece lining paper according to the present invention to a non-combustion heated consumption article. [Diagram 3] 1 illustrates the application of an exemplary mouthpiece lining paper according to the present invention to a filtered cigarette. [Figure 4] 1 shows an exemplary mouthpiece lining paper according to the present invention. [Diagram 5] 1 shows the creation of a ridge by laser. [Figure 6] 1 shows another exemplary mouthpiece lining paper according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0077] Figure 1 shows an exemplary structure of a filtered cigarette with a mouthpiece lining paper 1 according to the invention, which comprises a lacquer layer or printing 2. The substrate of the mouthpiece lining paper 1 or the lacquer layer or printing 2 comprises thermally expandable particles.

[0078] A conventional filtered cigarette further comprises tobacco paper 3 surrounding the rod of aerosol-generating substrate 4, which in the case of filtered cigarettes is usually referred to as the tobacco rod. A conventional filtered cigarette further comprises filter paper 5 surrounding the filter 6. The subject mouthpiece lining paper 1 can also be provided in non-filter cigarettes.

[0079] 2 shows an exemplary structure of a non-combustion heated consumption article comprising a mouthpiece lining paper 1 according to the present invention, which comprises a lacquer layer or print 2. The substrate of the mouthpiece lining paper 1 or the lacquer layer or print 2 comprises thermally expandable particles.

[0080] The conventional non-combustion heated consumable article further comprises a rod of aerosol-forming substrate 4, a hollow section 7, a cooling section 8, and a filter 6. Each of these sections may or may not include its own packaging.

[0081] Since the rod 4 of the non-combustion heated consumption article is heated without burning the packaging material, the mouthpiece lining paper 1 can extend over the entire length of the non-combustion heated consumption article. The mouthpiece lining paper 1 can be designed in several layers and can, for example, have an internal aluminum layer at least in the area of ​​the rod 4. In contrast to what is shown, a mouthpiece lining paper 1 that extends only over a partial area of ​​the non-combustion heated consumption article can also be attached to the non-combustion heated consumption article, in which case there may be additional packaging material for the rod and, if necessary, other components 6, 7, 8.

[0082] The non-combustion heated consumable article can be heated by an electronic device (non-combustion heating device), and the non-combustion heated consumable article having the rod 4 is first introduced into the device such that the mouthpiece lining paper 1 and the imprint or lacquer layer 2 are exposed for the user's lips. As shown, the imprint or lacquer layer 2 is not present in the area where the rod 4 is present or is fed into the device.

[0083] In another known embodiment of the non-combustion heated consumable product, the non-combustion heated consumable product has a heat source in front of the rod 4, in particular in the form of carbon.

[0084] The imprint or lacquer layer 2 containing thermally expandable particles can be placed in the area of ​​the heat source or in the area of ​​the rod 4, so that if the imprint or lacquer layer 2 is only present in a limited area or in a structured manner, a raised structure is formed when the consumer article is used.

[0085] As shown in Figures 1 and 2, the print or lacquer layer 2 extends only over a partial area of ​​the mouthpiece lining paper 1, for example being located only at the rear end of the aerosol-generating consumable article facing away from the rod 4.

[0086] The mouthpiece lining paper 1 may be present in areas where no print or lacquer layer 2 is provided or may contain perforations which may penetrate through the print or lacquer layer 2 and the base paper.

[0087] In another embodiment, the mouthpiece lining paper 1 may be provided with a print or lacquer layer 2 over the entire surface, as shown in FIG.

[0088] As shown in Figures 2 to 4, the mouthpiece lining paper 1 may further comprise a foil element 9, whereby this can be applied over the print or lacquer layer 2 or in areas not covered by the print or lacquer layer 2.

[0089] The printing or lacquer layer 2 can be a transparent lacquer layer or a pigmented lacquer layer or a colour imprint of a non-film-forming printing ink.

[0090] In the case of a clear lacquer layer, this can be on a white base paper or on a colour-printed or colour-coated base paper. A clear lacquer layer can cover a larger area than a colour-printed or colour-coated one.

[0091] In the case of a coloured lacquer layer, the coloured lacquer layer itself forms a coloured coating or coloured area of ​​the mouthpiece lining paper.

[0092] In figure 4 a strip of a single mouthpiece lining paper 1 is shown in a top view comprising a base paper, a print or lacquer layer 2 and three foil elements 9. The print or lacquer layer 2 is indicated by the dotted area.

[0093] Because the mouthpiece lining paper 1 or the base paper of the printing or lacquer layer 2 contains thermoexpandable particles, tactilely perceptible structures can be produced on the surface. In figures 1 to 4, exemplary protuberances 10 that can be produced within the scope of the present invention are shown.

[0094] In the example of Fig. 1, the thermally expandable particles are, for example, only contained in, and in particular encapsulated within, the base paper or substrate of the mouthpiece lining paper 1. When a small area of ​​the mouthpiece lining paper 1 is heated, the thermally expandable particles expand within this small area, resulting in bumps 10 in the base paper or substrate of the mouthpiece lining paper 1. These bumps 10 can be present in areas of the mouthpiece lining paper 1 that do not have a print or lacquer layer 2. These bumps 10 can also be present in areas of the mouthpiece lining paper 1 that have an imprint or lacquer layer 2, the bumps 10 being formed below the imprint or lacquer layer 2.

[0095] In the example of Figure 2, the thermally expandable particles are contained in the base paper or mouthpiece lining paper 1 substrate and in the print or lacquer layer 2. These ridges 10 can be present in areas of the mouthpiece lining paper 1 that do not have a print or lacquer layer 2. These ridges 10 can also be present in areas of the mouthpiece lining paper 1 that have an imprint or lacquer layer 2, with the ridges 10 below and within the imprint or lacquer layer 2. If the action of heat is applied over a small area, the expansion of the particles can be limited to the print or lacquer layer 2, as shown by the small ridges 10 on the underside of the consumer article.

[0096] Also shown in figure 2 is a band of foil elements 9 applied by hot stamping to the mouthpiece lining paper 1. As a result of the action of heat during hot stamping, the grains below the band of foil elements 9 expand, so that ridges 10 are present which are aligned with the band of foil elements 9.

[0097] In figures 3 and 4 it is shown that the thermally expandable particles are, for example, contained only in the print or lacquer layer 2, in particular encapsulated in the print or lacquer layer 2. In this case, heating of the mouthpiece lining paper 1 causes the particles in the print or lacquer layer 2 to expand, so that the substrate, in particular the base paper, does not have the bumps 10. The foil elements 9 shown in figure 4 in the areas of the substrate where the print or lacquer layer 2 is not provided therefore do not produce bumps 10. As shown in figures 3 and 4, the bumps 10 can be present in the print or lacquer layer 2 and formed by the action of local heat with or without the attachment of the foil elements 9. As already mentioned, the foil elements 9 can be present on the mouthpiece lining paper 1 in the form of bands or as locally delimited foil elements 9, for example in the form of dots or logos, as also shown in figure 4.

[0098] 3 and 4 also show bumps 10 in the print or lacquer layer 2 that are present in the form of dots and are not covered by the foil elements 9. The dots can be arranged to correspond to Braille characters. The dots or other shapes can also extend in a regular pattern over the entire surface of the print or lacquer layer 2.

[0099] Of course, in the embodiment of FIGS. 1 and 2, there may also be a regular pattern of bumps 10 or braille characters as bumps 10 on the substrate or base paper of the mouthpiece lining paper 1 .

[0100] As shown in FIG. 5, the raised structure or at least one bump 10 can be formed in a continuous area where the thermoexpandable particles are present by heating it with a laser beam moved over this area. In the example of FIG. 5, the lettering ABC is described as a raised structure by the laser beam. The thermoexpandable particles can be present in the base material or in the print or lacquer layer 2. The example of FIG. 5 also shows that the mouthpiece lining paper 1 can be present without a colored print, and the thermoexpandable particles are present in the base paper or in the colorless print or transparent lacquer layer 2. This colorless print or transparent lacquer layer 2 can be present on the entire surface of the mouthpiece lining paper 1 or in one or more partial areas. Depending on the energy of the laser beam, it is also possible to cause a color change in the mouthpiece lining paper 1, so that the structure stands out from the surrounding area only tactilely or additionally in color.

[0101] Instead of a laser beam, the raised structure or at least one ridge 10 can be formed by hot stamping or by applying heat through openings in a template.

[0102] As shown in FIG. 6, there may be a print or lacquer layer 2 containing thermally expandable particles on the mouthpiece lining paper 1 only in limited areas. In the example of FIG. 6, two areas or structures are printed or coated, each of which is shown as lettering ABC. By heating the mouthpiece lining paper 1 or the respective area, raised structures or bumps 10 may be generated in both areas or only in one area. As shown, it is preferable that the area with the thermally expandable particles does not differ in color from the surrounding surface. This can be done by a transparent print or lacquer coating, or by using a colored print or lacquer coating that is the background color or the color of the surrounding parts. In the example of FIG. 6, the dotted area represents a print that imitates cork. The print or lacquer layer 2 in this area may therefore be either transparent or the color of the cork imitation print.

[0103] The mouthpiece lining paper 1, in the sense of the outermost wrapping of an aerosol-generating consumable article that does not burn during consumption, can be attached to the non-combustion heating consumable article so as to be present in the region of the rod 4. The mouthpiece lining paper 1 preferably has an area with a print or lacquer layer 2 containing thermoexpandable particles, this area being surrounded or interspersed with areas that do not contain thermoexpandable particles, this area with thermoexpandable particles being heated by the non-combustion heating device during heating.

[0104] The example should be understood as purely illustrative. The mouthpiece lining paper 1 having the ridges 10 formed by the thermally expandable particles can be present on any kind of aerosol-generating consumer article, for example as a wrapper for cigars or cigarillos, or as a sheet of wrapper for hand-rolled cigarettes.

[0105] The mouthpiece lining paper 1 should be placed on the aerosol-generating consumable article such that the print or lacquer layer 2 is located on the outside of the aerosol-generating consumable article. If the print or lacquer layer 2 is only present in a partial area, it can be placed facing away from the rod 4 or in the area of ​​the rod 4 of the non-combustion heating consumable article.

Claims

1. A mouthpiece lining paper (1) that can be provided with at least one protuberance (10) by the action of heat, characterized in that the mouthpiece lining paper comprises heat-expandable particles present in a substrate or in a print or lacquer layer (2) of the mouthpiece lining paper (1), the print or lacquer layer (2) being disposed on the substrate of the mouthpiece lining paper (1).

2. The mouthpiece lining paper (1) according to claim 1, characterized in that the mouthpiece lining paper (1) has at least one ridge (10), the ridge (10) being formed by the thermally expandable particles, and the ridge is formed from the thermally expandable particles by heating the mouthpiece lining paper (1).

3. A mouthpiece lining paper (1) according to any one of claims 1 to 2, characterized in that the thermally expandable particles are present in the substrate of the mouthpiece lining paper (1), the substrate being paper.

4. Mouthpiece lining paper (1) according to claim 1, characterised in that the thermoexpandable particles are present in the print or lacquer layer (2).

5. The mouthpiece lining paper (1) according to claim 4, characterized in that the printing or lacquer layer (2) containing the thermoexpandable particles is present only in limited areas on the mouthpiece lining paper (1), such that the mouthpiece lining paper has at least one surface area in which thermoexpandable particles are present and at least one surface area in which thermoexpandable particles are not present.

6. 6. The mouthpiece lining paper (1) according to claim 5, characterized in that at least one surface area in which the thermally expandable particles are present is optically identical to at least one surface area in which the thermally expandable particles are not present, said areas being distinguishable by the expandable particles after exposure to heat.

7. 2. Mouthpiece lining paper (1) according to claim 1, characterized in that the printing or lacquer layer (2) is a printing ink, a clear lacquer layer or a coloured lacquer layer.

8. 2. Mouthpiece lining paper (1) according to claim 1, characterized in that a foil element (9) is present above said at least one ridge (10).

9. A method for producing a mouthpiece lining paper (1) having at least one ridge (10), characterized in that a mouthpiece lining paper (1) comprising thermoexpandable particles in a substrate of the mouthpiece lining paper (1) or in a printing or lacquer layer (2) on the substrate is brought into contact with a hot surface or irradiated by a laser beam, such that the thermoexpandable particles in areas of the mouthpiece lining paper (1) that are in contact with the hot surface or heated by the laser beam expand to form the ridge (10).

10. 10. The method according to claim 9, characterized in that a continuous web of mouthpiece lining paper (1) is moved along an embossing roller having a hot structured surface, and the protuberances of the structure of the embossing roller are transferred as protuberances (10) to the mouthpiece lining paper (1).

11. 10. The method according to claim 9, characterized in that a continuous web of mouthpiece lining paper (1) is moved through a hot stamping device by which a foil element (9) is attached to the mouthpiece lining paper (1), and in that heat-expandable particles of the mouthpiece lining paper (1) present in the area of ​​the attachable film element (9) expand to form ridges (10).

12. 10. An aerosol-generating consumer article comprising the mouthpiece lining paper (1) of claim 1, characterized in that after heating the mouthpiece lining paper (1), a protuberance (10) is present on the outside of the consumer article in the heated area.

13. 13. An aerosol-generating consumable article according to claim 12, characterized in that the protuberances (10) are in the form of a symbol, structure or code.

14. An apparatus for manufacturing the mouthpiece lining paper (1) according to claim 1, comprising a machine for printing or coating the mouthpiece lining paper (1) and a machine for hot stamping the mouthpiece lining paper (1), characterized in that a band can be transported through each of the machines, the band being arranged in the transverse direction of a number of mouthpiece lining papers (1) for one aerosol-generating consumer article.

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