JP2024518451A - Tipping paper with thermally expandable particles - Google Patents

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 in 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

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

The present invention relates in particular to mouthpiece lining papers for cigarettes and non-combustion heating consumption articles, or generally to mouthpieces for aerosol generating consumption articles.

Mouthpiece lining paper, often referred to simply as "tip paper" or "tip", 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 portion and typically projects slightly into the longitudinal region of the tobacco rod or aerosol-generating substrate in the longitudinal direction of the consumer article, where it surrounds the tobacco paper or aerosol-generating substrate wrapper. The mouthpiece lining paper forms the outermost wrapper of the aerosol-generating consumer article and, in contrast to tobacco paper, is not combusted when the consumer article is used.

Mouthpiece lining paper is most often actually paper, but can also be a foil or a composite material formed from several layers of different materials.

Mouthpiece lining papers often contain an imprint. For example, the imprint may be an imitation of cork. However, mouthpiece lining papers in which the lip contact area is white are also used.

U.S. 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 operated application device.

U.S. Pat. No. 9,307,789

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

To achieve this goal, the mouthpiece lining paper described in claim 1 is proposed.

The mouthpiece lining paper contains heat expandable particles that can be expanded by the action of heat to produce a raised structure or at least ridges.

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

The substrate is preferably paper, in particular so-called base paper having a basis weight of 30 to 60 g/m ² , particularly preferably 30 to 50 g/m ² .

Less preferably, in addition to the base paper, the substrate can comprise a foil, in particular formed from cellulose hydrate. Less preferably, the substrate can consist of a foil, in particular cellulose hydrate, or be present as a laminate of several foils. In these cases, the thermally expandable particles can be included in the foil.

Preferably, the mouthpiece lining paper is in fact paper, and the thermally expandable particles are included in the paper, particularly in that they are encapsulated in the fiber matrix of the paper during the papermaking process.

In a second embodiment, the thermoexpandable particles are included in the print or coating. The thermoexpandable particles can be applied by means of a non-film-forming printing ink or a film-forming clear lacquer or a film-forming colored lacquer.

The particles are preferably expanded by the action of heat as the web of mouthpiece lining paper is conveyed along the hot cylinder or hot embossing rollers of a hot stamping machine.

In the first embodiment, only heating is performed, so that the hot stamping foil is not transferred, in contrast to the conventional use of a hot stamping machine.

In a second embodiment, a hot stamping foil is transferred in addition to or in conjunction with the heating. As a result, the hot stamping foil is present on the raised areas formed by the expanded particles. The foil optically enhances the raised areas.

Expansion can also be carried out using other machines that allow targeted or structured heating of the web of mouthpiece lining paper, for example thermal printers, in particular thermal Braille printers.

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.

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.

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

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.

Expansion is preferably performed 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.

In one embodiment, the expandable particles are applied by lacquer and are therefore included in a lacquer layer on the mouthpiece lining paper.

The term lacquer includes any type of film-forming substance.

In a first embodiment, the lacquer is a clear lacquer that hardens to form a clear lacquer layer.

It is particularly preferred that the clear lacquer is a nitrocellulose lacquer.

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.

The clear lacquer composition is preferably applied in an amount of from 0.25 g/m ² to 2 g/m ² , particularly preferably from 0.5 g/m ² to 1 g/m ² .

In a second embodiment, the lacquer is a pigmented lacquer that hardens to form a pigmented lacquer layer.

The colored lacquer comprises nitrocellulose or ethylcellulose, thermoexpandable particles and color pigments, as well as 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 colored lacquer comprises nitrocellulose or ethylcellulose, color pigments, as well as organic solvents and water. The colored lacquer can also contain additives and/or fillers.

The coloured lacquer may also contain effect pigments.

The pigmented lacquer compositions are preferably applied in an amount of from 0.25 g/m ² to 8 g/m ² , particularly preferably from 1 g/m ² to 4 g/m ² .

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).

The clear or colored lacquer is preferably applied by gravure printing, in particular rotogravure printing.

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

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

The base paper preferably has a basis weight of 30 to 60 g/m ² , particularly preferably 30 to 50 g/m ² .

The lacquer is preferably applied to the untreated surface of the base paper. The base paper is therefore preferably not coated.

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 around the circumference of the aerosol-generating consumable article.

In one embodiment, the expandable particles are applied by water-based printing ink and are therefore included in the printing onto the mouthpiece lining paper.

The aqueous printing ink preferably has a viscosity of 15 to 60 seconds, particularly preferably 16 to 35 seconds, in particular 16 to 21 seconds.

The aqueous printing inks are preferably applied in an amount of from 0.25 g/m ² to 8 g/m ² , particularly preferably from 1 g/m ² to 4 g/m ² .

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

As already mentioned, in one embodiment the color imprint is a colored lacquer layer.

In a second embodiment, the color imprint can be a non-film-forming coating or printing, for example in the form of a colored or printing ink. As mentioned above, a clear lacquer can be applied onto the colored coating. The clear lacquer layer is preferably present continuously 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 clear lacquer layer.

The application of the colored inks and/or lacquers is carried out on a continuously moving material web of base paper. After application, the material web is preferably moved through a drying device.

Heated dryers, especially 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.

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

If the expanding 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.

After the lacquer layer has dried, the material web is either 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 either wound onto a bobbin or the structured material web is fed to a cigarette making machine.

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

Hot stamping is carried out 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 strongly in the hot stamping process, as a result of which the thermoexpandable particles located below the foil element expand.

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.

Optionally, 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.

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

The mouthpiece lining paper is moved as a band through each machine and the application of printing inks or lacquers and hot stamping is preferably continuous in the longitudinal direction of the band.

In an advantageous embodiment, the band of mouthpiece lining paper is wound onto a bobbin after each machine and transferred to the next machine, rather than being transferred from one machine to the next.

The band moving through the machine for coating the mouthpiece lining paper with printing ink or lacquer is made up of several pieces of mouthpiece lining paper 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 subsequently aligned with the longitudinal direction of the consumer article.

The machine for printing or coating the mouthpiece lining paper with printing ink or lacquer preferably comprises a cutting device for cutting 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 ink or lacquer. Each of the narrower bands is wound up on a bobbin.

These bobbins with narrower bands are preferably fed into the machine for hot stamping the mouthpiece lining paper.

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 a gas or a liquid, where a gas expands under the action of heat or a liquid evaporates with an increase in volume. The deformation is irreversible and persists after cooling.

The thermally expandable particles are preferably thermoplastic polymer particles or gel particles.

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

The expansion of the particles can also be performed without contact, for example by heating the part area to be expanded by a laser beam.

The expandable particles preferably have an expansion temperature of 100 to 250°C.

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

In addition to polymeric hollow microspheres, inorganic particles such as expandable mica, expandable graphite, and perlite can be used.

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 (coatings of coats of arms, identification marks, etc.) as raised structures in the areas of the mouthpiece lining paper that contain the thermally expandable particles. The laser can be moved line by line on the surface of the mouthpiece lining paper, the laser beam then only hitting or only turning on 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, a movement of the laser beam transverse to the conveying direction of the mouthpiece lining paper can be sufficient.

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 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.

In another embodiment, the mouthpiece lining paper is provided with a lacquer or a water-based printing ink only in limited areas, and the thermally expandable particles are included in the lacquer or the printing ink. As a result, the expandable particles are present only in limited areas 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 the expandable particles cannot be optically distinguished from the area without the expandable particles. After heating, the area with the expandable particles stands out in relief from the other areas, so that the area becomes tactile and, therefore, possibly visually distinguishable simply by heating.

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.

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.

The present invention is explained below with reference to the drawings:

1 illustrates the application of an exemplary mouthpiece lining paper according to the present invention to a filtered cigarette. 1 illustrates the application of an exemplary mouthpiece lining paper according to the present invention to a non-combustion heated consumption article. 1 illustrates the application of an exemplary mouthpiece lining paper according to the present invention to a filtered cigarette. 1 shows an exemplary mouthpiece lining paper according to the present invention. 1 shows the creation of a ridge by laser. 1 shows another exemplary mouthpiece lining paper according to the present invention.

Figure 1 shows an exemplary structure of a filter cigarette with a mouthpiece lining paper 1 according to the present invention, which includes a lacquer layer or print 2. The substrate of the mouthpiece lining paper 1 or the lacquer layer or print 2 includes thermally expandable particles.

A conventional filtered cigarette further comprises tobacco paper 3 surrounding the rod 4 of aerosol-generating substrate, 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 cigarettes without filters.

Figure 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.

A conventional non-combustion heated consumable article further comprises a rod 4 of aerosol-generating substrate, a hollow portion 7, a cooling portion 8, and a filter 6. Each of these portions may or may not include its own packaging.

Since the rod 4 of the non-combustion heated consumable article is heated without burning the packaging material, the mouthpiece lining paper 1 can extend over the entire length of the non-combustion heated consumable 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 consumable article can also be attached to the non-combustion heated consumable article, in which case there may be additional packaging material for the rod and, if necessary, other components 6, 7, 8.

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.

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

The imprint or lacquer layer 2 containing the 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.

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, located only at the rear end of the aerosol-generating consumable article facing away from the rod 4.

The mouthpiece lining paper 1 may be present in areas where there is no printed or lacquered layer 2, or may contain perforations which may penetrate through the printed or lacquered layer 2 and the base paper.

In another embodiment, the mouthpiece lining paper 1 can be provided with a print or lacquer layer 2 over the entire surface, as shown in Figure 3.

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

The printing or lacquer layer 2 can be a clear lacquer layer or a pigmented lacquer layer or a colour imprint of a non-film-forming printing ink.

In the case of a transparent lacquer layer, this can be on a white base paper or on a color-printed or color-coated base paper. A transparent lacquer layer can cover a larger area than a color-printed or color-coated one.

In the case of a pigmented lacquer layer, the pigmented lacquer layer itself forms a pigmented coating or a pigmented area on the mouthpiece lining paper.

In FIG. 4, a single strip of 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.

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

In the example of FIG. 1, the thermally expandable particles are, for example, only contained in the base paper or substrate of the mouthpiece lining paper 1, in particular encapsulated therein. When a small area of the mouthpiece lining paper 1 is heated, the thermally expandable particles expand in this small area, causing 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.

In the example of FIG. 2, the thermally expandable particles are contained in the base paper or mouthpiece lining paper 1 substrate and the print or lacquer layer 2. These ridges 10 can be present in areas of the mouthpiece lining paper 1 that do not have the print or lacquer layer 2. These ridges 10 can also be present in areas of the mouthpiece lining paper 1 that have the 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.

Also shown in FIG. 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 that are aligned with the band of foil elements 9.

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 expands the particles in the print or lacquer layer 2, so that the substrate, in particular the base paper, does not have the bumps 10. The foil elements 9 shown in FIG. 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 FIG. 3 and 4, the bumps 10 can be present in the print or lacquer layer 2 and can be 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 FIG. 4.

3 and 4 also show bumps 10 in the print or lacquer layer 2 that are present in 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 across the surface of the print or lacquer layer 2.

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

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.

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 an opening in a template.

As shown in FIG. 6, the print or lacquer layer 2 containing thermally expandable particles can be present 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 shown as lettering ABC. By heating the mouthpiece lining paper 1 or the respective area, raised structures or bumps 10 can be generated in both areas or only one area. As shown, the area with the thermally expandable particles is preferably not different in color from the surrounding surface. This can be done by transparent printing or lacquering, or by using a colored printing or lacquering that is the background color or the color of the surrounding parts. In the example of FIG. 6, the dotted area represents a printing that imitates cork. The printing or lacquer layer 2 in this area can therefore be either transparent or the color of the cork imitation printing.

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

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.

The mouthpiece lining paper 1 should be placed on the aerosol-generating consumable article such that the printed or lacquered layer 2 is located on the outside of the aerosol-generating consumable article. If the printed or lacquered 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 (14)

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 (1) comprises heat-expandable particles present in the substrate or in a print or lacquer layer (2) of the mouthpiece lining paper (1), and the print or lacquer layer (2) is disposed on the substrate of the mouthpiece lining paper (1). 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) is formed by the thermally expandable particles, and the ridge is formed from the thermally expandable particles by heating the mouthpiece lining paper (1). 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), and the substrate is paper. Mouthpiece lining paper (1) according to any one of claims 1 to 3, characterized in that the thermally expandable particles are present in the print or lacquer layer (2). Mouthpiece lining paper (1) according to claim 4, characterized in that the print or lacquer layer (2) containing the thermoexpandable particles is present only in a limited area on the mouthpiece lining paper (1) so that the mouthpiece lining paper has at least one surface area in which the thermoexpandable particles are present and at least one surface area in which the thermoexpandable particles are absent. 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 area being distinguishable by the expandable particles after exposure to heat. Mouthpiece lining paper (1) according to any one of claims 1 to 6, characterized in that the printing or lacquer layer (2) is a printing ink, a clear lacquer layer or a colored lacquer layer. Mouthpiece lining paper (1) according to any one of claims 1 to 7, characterized in that a foil element (9) is present above said at least one ridge (10). A method for producing a mouthpiece lining paper (1) having at least one ridge (10), characterized in that the mouthpiece lining paper (1) containing thermally expandable particles in the substrate of the mouthpiece lining paper (1) or in a print or lacquer layer (2) on the substrate is brought into contact with a hot surface or irradiated by a laser beam, such that the thermally expandable particles in the 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). 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 ridges of the structure of the embossing roller are transferred as ridges (10) to the mouthpiece lining paper (1). 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 that thermally expandable particles of the mouthpiece lining paper (1) present in the area of the attachable film element (9) expand to form bumps (10). An aerosol-generating consumable article comprising a mouthpiece lining paper (1) according to any one of claims 1 to 8, characterized in that after heating the mouthpiece lining paper (1), there is a protuberance (10) on the outside of the consumable article in the heated area. The aerosol-generating consumable article of claim 12, characterized in that the protuberances (10) are in the form of a symbol, structure or code. An apparatus for manufacturing a mouthpiece lining paper (1) according to any one of claims 1 to 8, 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 lateral direction of a number of mouthpiece lining papers (1) for one aerosol-generating consumer article.

Images