Device for manufacturing paper packaging material

Abstract

Apparatus and method for producing packaging material from two paper webs, wherein at least one of the paper webs (6) has embossed features (11) that project beyond the paper web (6) and are each bounded in the plane of the paper web by a closed circumferential line, and the paper webs (6, 8) consist exclusively of paper on their mutually facing surfaces and are free of adhesive and bonding synthetic additive material, in particular free of plastic film, preferably after preconditioning of the paper webs (6, 8), are pressed together in such a way that in connecting sections (110, 112) between the features (11) paper fibers of one paper web (6) are connected with paper fibers of the other paper web (8) and the paper webs (6, 8) define closed cavities (108) in the area of ​​the features (11).

Description

[0001] The invention relates to a device for producing packaging material from paper.

[0002] To protect fragile or pressure-sensitive items during shipping, plastic bubble wrap is often used. It is made from polyethylene, for example, and has a large number of bubble-like air pockets arranged in a regular pattern to create a cushioning effect. Because of the nub-like design of the air pockets, bubble wrap is often also referred to as bubble wrap.

[0003] While such plastic bubble wrap is in principle reusable, in practice, reuse is hampered by the lack of a system for collecting the packaging material and repurposing it for targeted reuse.

[0004] Even though bubble wrap made of polyethylene, for example, is technically recyclable, recycling is relatively labor-intensive and therefore expensive in practice. As a result, bubble wrap is often disposed of after a single use. Since bubble wrap made of polyethylene, for example, is not biodegradable, this leads to substantial environmental pollution. Plastic waste generated by bubble wrap, among other things, is often subjected to thermal recycling and incineration.

[0005] As long as bubble wrap is collected as part of a recycling system, practice shows that this does not prevent environmental pollution. In fact, plastic often enters the environment, especially the ocean, even from such recycling systems. If the plastic does not decompose, it pollutes ecosystems and poses a threat to marine animals, for example. If the plastic is shredded or decomposed over time, for example due to mechanical influences and UV radiation, plastic particles are created, particularly in the form of microplastics, which remain in the environment or are ingested by living organisms through food.

[0006] The environmental impact of plastic is exacerbated by the fact that the amount of plastic waste from packaging material is constantly increasing due to the ever-growing volume of parcels and mail.

[0007] DE 604 412 A discloses a packaging material in the form of a cushioning pad for pressure-sensitive objects consisting of several paper layers, in which at least one paper web has spherical or waffle-shaped embossings and the paper webs are glued together.

[0008] DE 1 156 701A shows and describes a further development of the packaging material known from the aforementioned publication, wherein the outer surfaces of the packaging material are covered with embossed cellulose wadding. A similar packaging material is also known from GB 893 060 A.

[0009] DE 10 2006 000 006 A1 discloses a method and a device for producing a multi-layer fibrous web.

[0010] DE 622 340 A discloses a packaging material in which several layers of the cushioning material known from DE 604 412 A are glued together one on top of the other.

[0011] WO 2020 / 227649 A1 shows and describes a multi-layer structure for a padded shipping packaging with corrugated embossed paper.

[0012] DE 69 731 A shows and describes the production of corrugated cardboard.

[0013] US 2020 / 01 80255 A discloses a packaging material whose surface is randomly crumpled in sections by means of a special device to achieve a cushioning effect.

[0014] EP 0 523 382 B1 shows and describes a device for producing a multi-layer packaging material. The packaging material consists of three superimposed, embossed webs.

[0015] EP 2 792 478 A1 discloses a device for producing corrugated cardboard, wherein a corrugated intermediate web is glued to two smooth carrier webs.

[0016] US 2018 / 0086021 A1 discloses a packaging material consisting of two superimposed, wave-like webs in cross-section, of which an inner web is dimensionally stable and an outer web is flexible.

[0017] DE 1 15 6 701 B discloses a so-called cushioning paper consisting of several embossed paper layers, wherein the paper layers are arranged one above the other and connected to each other by adhesive points or corrugations.

[0018] EP 0 650 827 B1 shows and describes a corrugated cardboard-like packaging material in which a web with a corrugated cross-section is arranged between two smooth webs and the webs are connected to one another by punching.

[0019] EP 1 853 419 B1 discloses a method and a device for producing multi-layer tissue paper.

[0020] EP 3 683 357 B1 discloses a multi-layer paper containing waste paper and grass fibers.

[0021] The subsequently published document WO 2021 / 046395 A1 discloses a packaging material consisting of several paper webs in the manner of a bubble wrap, wherein the paper webs are connected to one another by adhesive, fastening elements such as staples or folding of the edges.

[0022] JP 2010 228111 A discloses a device for producing packaging material from a composite material, in which a first composite material layer is embossed with approximately hemispherical structures in a regular pattern. This layer is glued to a flat layer to form a crumple zone.

[0023] The invention is based on the object of providing a packaging material that is improved compared to the known packaging materials.

[0024] This object is achieved by the invention defined in claim 1.

[0025] A device according to the invention according to claim 1 for producing packaging material from paper has means for feeding at least a first paper web and a second paper web to an embossing area of ​​the device and a pressing area of ​​the device arranged downstream of the embossing area in the feed direction of the paper webs. An embossing device for embossing the first paper web is arranged in the embossing area, wherein the embossing device is designed and configured such that embossed features are embossed from the first paper web, which protrude beyond the first paper web and are each delimited by a closed circumferential line in the paper web plane of the first paper web.

[0026] In the pressing area, a pressing device for pressing the paper webs free of adhesive and connecting synthetic additional material, in particular free of plastic film, is arranged, wherein the pressing device is designed and configured such that in connecting sections between the formations, paper fibers of the first paper web connect with paper fibers of the second paper web and the paper webs delimit closed cavities in the area of ​​the formations, wherein preconditioning means with at least one preconditioning device for preconditioning the first paper web and / or the second paper web for embossing the first paper web or pressing the paper webs together are arranged in the feed direction upstream of the embossing area and / or the pressing area.

[0027] The invention provides a paper packaging material in the manner of bubble wrap, comprising a first paper web and a second paper web, wherein at least one paper web has embossed features that protrude beyond the paper webs and are each delimited by a closed circumferential line in the plane of the paper web. At least one of the paper webs thus forms an embossed "embossed web," while at least one other paper web can form a smooth "carrier web." The features in the first paper web can, for example, have a diameter of approximately 10 mm and a height of approximately 3 to 4 mm.

[0028] According to the invention, a bond between paper fibers of the first paper web and paper fibers of the second paper web, or the bonding or connection of paper fibers of the first paper web to paper fibers of the second paper web, is understood to mean a mechanical bond between the paper fibers that occurs when the paper webs are pressed together. During the pressing of the paper webs, paper fibers of the first paper web "interlock" with paper fibers of the second paper web, thus forming a mechanical bond between the paper webs.

[0029] According to the invention, the paper webs consist exclusively of paper on their mutually facing surfaces and are free of adhesive and connecting synthetic additives, in particular free of plastic film. Preferably, after preconditioning the paper webs, they are pressed together in such a way that, in connecting sections between the formations, paper fibers of the first paper webs are connected to paper fibers of the second paper web, and the paper webs define closed cavities in the region of the formations. A closed cavity is understood, according to the invention, to be a geometrically closed cavity, regardless of whether and to what extent the cavity is gas-tight.

[0030] The packaging material according to the invention is similar in its basic structure to conventional plastic bubble wrap, but unlike the latter, it is made entirely of paper.

[0031] Because, according to the invention, the paper webs consist exclusively of paper and are free of adhesive and synthetic additives, in particular free of plastic film, the packaging material according to the invention can be easily and completely recycled.

[0032] The packaging material according to the invention thus significantly reduces the burden on the environment. Given the quantities of bubble wrap and similar packaging materials used worldwide, this reduction is significant, so the invention has a significant social benefit.

[0033] The invention avoids large quantities of plastic waste that would otherwise have to be disposed of and, as experience shows, would end up in significant quantities in the environment, especially in the sea.

[0034] It has surprisingly been found that the packaging material according to the invention has a cushioning effect comparable to that of conventional plastic air cushion material, although the closed cavities formed in the packaging material according to the invention in the embodiments are not gas-tight, in contrast to the air bubbles in conventional plastic air cushion material.

[0035] It has further been shown that after preconditioning at least the "embossed web," the webs are sufficiently firmly bonded together by pressing, without the need for adhesive, other synthetic bonding agents, plastic film, or mechanical fasteners. According to the invention, the webs are bonded exclusively by the bonding of the paper fibers of the webs that occurs after preconditioning during pressing.

[0036] Depending on the respective requirements and circumstances, the preconditioning of at least one paper web can be carried out by means of a preconditioning device in any suitable manner, in particular by introducing moisture and heat into the web in question. An advantageous development of the invention provides that at least one preconditioning device is designed and configured for introducing or applying a preconditioning liquid, which is preferably water or contains water, into or onto at least one of the paper webs.

[0037] According to the invention, the introduction or application of a preconditioning liquid into or onto a paper web can be carried out in any suitable manner, for example, by drawing the paper web in question through a bath of the preconditioning liquid, for example, a water bath. An advantageous development of the aforementioned embodiment provides that at least one preconditioning device is designed and configured to spray, atomize, or vaporize a preconditioning liquid, such that the preconditioning liquid is sprayed, atomized, or vaporized onto the associated paper web.

[0038] A particularly advantageous development of the aforementioned embodiment provides that at least one preconditioning device, in particular a preconditioning device associated with the first paper web, is designed and configured to apply steam to the associated paper web. The use of steam at a temperature of, for example, 100°C to approximately 150°C enables particularly effective preconditioning of the web in question by simultaneously introducing moisture and heat into the web.

[0039] According to the invention, it is generally sufficient if only the "embossing web," i.e., the web in which the embossings are formed, is preconditioned. However, according to the invention, both the "embossing web" and the or at least one "carrier web" are advantageously preconditioned. The preconditioning of the webs can generally be carried out in an identical or similar manner. An advantageous development of the invention provides that each of the paper webs is assigned a separate preconditioning device for separate, in particular different, preconditioning of the paper webs. The use of separate preconditioning devices makes it possible to individually adapt the preconditioning of the webs.

[0040] In this context, a further development of the invention provides that a first preconditioning device is assigned to the first paper web and is arranged on the feed path of the first paper web to the embossing area and a second preconditioning device is assigned to the second paper web and is arranged on the feed path of the second paper web to the pressing area.

[0041] An exceptionally advantageous development of the invention provides that at least one preconditioning device, in particular the preconditioning device assigned to the second paper web, is designed and configured to introduce or apply a preconditioning liquid, preferably water, which contains cellulose fibers or cellulose particles, wherein the cellulose fibers or cellulose particles are preferably or contain microcellulose and / or nanocellulose, in particular cellulose microfibers (CMF) and / or cellulose nanofibers (CNF). By using cellulose fibers applied by means of a preconditioning liquid, which is preferably water, the bonding of the webs to one another is further improved while maintaining the basic idea of ​​the invention, namely to provide a packaging material consisting exclusively of paper.Accordingly, even in this embodiment, recycling of the packaging material is not hindered by adhesives, plastic film, or other synthetic additives. In a similar way, other natural fibers can be used in addition to or instead of cellulose fibers.

[0042] The embossing of the "embossing web" can be carried out in different ways depending on the respective requirements and circumstances. An advantageous development of the invention provides that a roller arrangement with an embossing roller mounted for rotation about an embossing roller axis is arranged as the embossing device in the embossing area. The embossing roller has embossing projections on its peripheral surface for forming the embossed portions in the first paper web. The embossing roller engages a counter-roller mounted for rotation about an axis parallel to the embossing roller axis and has embossing recesses on its peripheral surface that are complementary to the embossing projections of the embossing roller. In this way, embossing is possible in a continuous process while simultaneously maintaining a relatively simple and trouble-free design of the device according to the invention for producing the packaging material according to the invention.According to the invention, a complementary design of the embossing recesses in the counter roll to the embossing projections in the embossing web means that when an embossing projection engages an embossing recess, a gap remains whose gap width corresponds to the resulting thickness of the embossed paper web in the area of ​​the embossing. The shape, geometry, and number of embossing projections can be selected within wide limits according to the respective requirements and conditions.

[0043] Another advantageous development of the invention provides that a press roller which is mounted rotatably about a press roller rotation axis is arranged in the pressing area as a pressing device, which press roller cooperates with a counter-roller to press the first paper web with the second paper web, the axis of rotation of which is parallel to the press roller rotation axis and spaced apart such that a press roller gap is formed between the press roller and the counter-roller for pressing the first paper web with the second paper web in the connecting sections of the paper webs away from the impressions. In this embodiment, the webs are pressed together in a continuous process, so that the packaging material according to the invention can be produced entirely in a continuous process. The contact pressure or the driving force with which orwith which, during operation of the device, the press roller is pressed against the counter roller to form the press roller gap in which the paper webs to be pressed together are located during operation of the device, can be selected and preferably adjusted within wide limits according to the respective requirements and circumstances.

[0044] In principle, according to the invention, the embossing area can be realized in an embossing station, and the pressing area can be realized in a pressing station spaced from the embossing area in the feed direction of the paper webs. An extremely advantageous development of the invention provides that the counterroller of the embossing roller and the counterroller of the pressing roller are formed by a common counterroller, such that the roller arrangement comprises three rollers operatively engaged with one another. In this embodiment, the roller arrangement consisting of the embossing roller, the counterroller, and the pressing roller forms a combined embossing / pressing station of the device.Here, the roller arrangement is designed in the manner of a calender, whereby the roller arrangement according to the invention differs from an L-calender in that, in the simplest case, it has only three rollers: the embossing roller, the counter roller, and the press roller. Accordingly, the fourth roller, the last roller in the conveying direction, present in an L-calender is not required. A particular advantage of this embodiment is that the impressions formed by the embossing roller in the "embossing web" remain in the recesses of the counter roller until the webs are pressed together in the press nip between the counter roller and the press roller.

[0045] In the aforementioned embodiment, the rotational axis of the counter-roller is expediently arranged on a straight connecting line between the embossing roll rotational axis and the press roll rotational axis, as provided for in an advantageous further development of the invention.

[0046] In order to adjust the gap width of the press roll gap, another advantageous development of the invention provides that the press roll is assigned a preferably motor-driven adjustment device for adjusting the gap width of the press roll gap along a linear axis extending radially to the press roll rotation axis. This embodiment also makes it possible to completely disengage the press roll from the counter roll if the device according to the invention is to be used to produce packaging material that consists exclusively of the "embossing web." The adjustment device can, in particular, be an electromotive adjustment device controlled by a control device.

[0047] According to another advantageous development of the invention, the embossing roller and / or the counter roller and / or the pressing roller are assigned a heating device for heating the respective roller, preferably for adjusting the temperature of the rollers separately from one another. During the pressing process, moisture is pressed out of the webs, whereby the webs are pre-dried by heating the rollers during the embossing or pressing process. By appropriately adjusting the temperature of the rollers, this pre-drying can be controlled according to the respective requirements and conditions.

[0048] In the aforementioned embodiment, a temperature sensor for detecting the temperature of the respective roller is preferably assigned to the embossing roller and / or the counter roller and / or the press roller.

[0049] In order to further dry the pressed webs to achieve a desired residual moisture content of the final product, namely the packaging material, another advantageous development of the invention provides for drying means to be arranged in the feed direction between the pressing area and a storage area for the finished packaging material. In addition to achieving a desired residual moisture content of the finished packaging material, the drying process has the effect of increasing the strength of the bond between the paper webs.

[0050] The number, heating output, and structural design of the drying means can be selected within wide limits according to the respective requirements and conditions. Advantageous developments of the invention provide that the drying means comprise at least two drying devices spaced apart from one another in the feed direction and / or that at least one drying device is designed as an infrared radiation drying device and at least one drying device is designed as a warm air drying device. Preferably, at least one warm air drying device is arranged downstream of at least one infrared radiation drying device in the feed direction of the paper webs.

[0051] Another advantageous development of the invention provides that the press roller consists of an elastically flexible material, in particular silicone, at least on its peripheral surface.

[0052] The disclosure content of the present application and the subject matter of the invention further includes, according to claim 9, a method for producing packaging material from paper, wherein at least a first paper web and at least a second paper web are fed to an embossing area and a pressing area arranged downstream of the embossing area in the feed direction of the paper webs, wherein in the embossing area, by means of an embossing device, impressions are embossed from the first paper web, which protrude beyond the first paper web and are each delimited by a closed circumferential line in the paper web plane of the first paper web, wherein in the pressing area, by means of a pressing device, the paper webs are pressed together free of adhesive and connecting synthetic additional material, in particular free of plastic film, in such a way thatthat in connecting sections between the formations, paper fibers of the first paper web connect with paper fibers of the second paper web and the paper webs delimit closed cavities in the region of the formations, wherein the first paper web and / or the second paper web is / are preconditioned in preparation for embossing in the embossing area or pressing the paper webs together in the pressing area.

[0053] Advantageous and expedient developments of the method according to the invention are specified in the subclaims referring back to claim 9. The same advantages and properties result as in the device according to the invention and its developments.

[0054] The method according to the invention can be carried out in particular using a device according to the invention.

[0055] The disclosure content of the present application and the subject matter of the invention further includes, according to claim 17, a packaging material made of paper, with a first paper web and with a second paper web, wherein at least one paper web has embossed features which protrude beyond the paper web and are each delimited by a closed circumferential line in the plane of the paper web, wherein the paper webs consist exclusively of paper on their mutually facing surfaces and are pressed together free of adhesive and connecting synthetic additional material, in particular free of plastic film, preferably after preconditioning of the paper webs, in such a way that in connecting sections of the paper webs between the features, paper fibers of the first paper web are connected to paper fibers of the second paper web and the paper webs delimit closed cavities in the region of the features.

[0056] A protrusion within the meaning of the invention is understood to mean an embossing in a paper web that protrudes beyond the paper web plane. If, according to a preferred embodiment, the packaging material according to the invention consists of an "embossed web" provided with protrusions and a smooth "carrier web," the protrusions protruding beyond the paper web plane, together with the "carrier web," define cavities, so that the packaging material according to the invention is designed in the manner of a bubble wrap. A protrusion can, in particular, be nub-shaped, as is known from plastic bubble wrap.

[0057] Depending on the respective requirements and circumstances, the shape and size of the embossed portions embossed from the first paper web can be selected within wide limits. An advantageous development of the invention provides that the circumferential line delimiting each embossed portion is circular or approximately circular, such that the embossed portions are shaped like spherical surfaces. A corresponding shape of the embossed portions is advantageous both in terms of the desired cushioning effect of the packaging material and in terms of production.

[0058] The packaging material according to the invention can be provided in a variety of ways for packaging fragile or pressure-sensitive objects, for example and in particular in the form of web material that can be cut by the user according to the size of the object being packaged. The packaging material according to the invention can also be provided in the form of prefabricated blanks. For example, the packaging material according to the invention can also be designed as a shipping box or in the manner of a bubble wrap envelope, or form part of corresponding packaging materials.

[0059] Depending on the respective requirements and circumstances, the number of paper webs comprising the packaging material according to the invention can be selected within wide limits. For example, the packaging material according to the invention can consist of more than two paper webs. For example, and in particular, the packaging material according to the invention can consist of an "embossed web" provided with embossings and a smooth "carrier web." An alternative embodiment of the invention provides that embossings are embossed from both paper webs and that the paper webs are connected to one another in such a way that embossings in one paper web are arranged opposite corresponding embossings in the other paper web. In this embodiment, the embossings in one paper web, together with the embossings in the other paper web, delimit the cavities of the packaging material according to the invention.

[0060] Another advantageous development of the packaging material according to the invention provides that the features form a regular pattern, in particular are arranged in rows and / or columns.

[0061] Any suitable paper can be used as the starting material for the packaging material according to the invention. A particularly advantageous development of the invention provides for the paper webs to consist of or contain recycled paper. This embodiment is particularly environmentally friendly because the use of virgin paper, the production of which requires a high level of energy, is completely or at least partially avoided.

[0062] A further development of the above-mentioned embodiment provides that the recycled paper has at least one, in particular all of the following characteristics: Specific weight / grammage [ISO 536]: 60 - 140 g / m 2 < Water absorption according to Cobb 60 [ISO 535]: 26 - 113 g / m 2 < Roughness according to Bendtsen [ISO 8791-2]: ≥ 300 ml / min Bursting strength [ISO 2758]: 160 - 240 kPa SCT-cross INDEX [ISO 9895]: 1.1 - 1.9 kN / m

[0063] According to an advantageous development of the packaging material according to the invention, the connecting sections between the formations are designed in a web-like manner.

[0064] Another advantageous development of the invention provides that the paper webs are couched together at least in sections in the connecting sections.

[0065] The invention is explained in more detail below with reference to the accompanying, highly schematic drawings using exemplary embodiments. It will be apparent to those skilled in the art that the individual features of an exemplary embodiment further develop the exemplary embodiment in their own right, i.e., independently of the other features.

[0066] It shows: Fig. 1 highly schematic and sketchy a first embodiment of an inventive device for producing packaging material, Fig. 2 in a schematic side view the embodiment according to Fig. 1 , Fig. 3 in a schematic perspective view the embodiment according to Fig. 1 , Fig. 4 in a schematic radial view a roller arrangement of the embodiment according to Fig. 1 , Fig. 5 in a perspective view the roller arrangement according to Fig. 4 , Fig. 6 in a sectional view along a line AA in Fig. 5 the roller arrangement according to Fig. 4 , Fig. 7 in a perspective view an embossing roller of the roller arrangement according to Fig. 4 , Fig. 8in the same representation as Fig. 7 a counter roller of the roller arrangement according to Fig. 4 , Fig. 9 shows the structure of an embodiment of a web tension sensor of the device according to Fig. 1 , Fig. 10 block diagram of the structure of a system control of the device according to Fig. 1 , Fig. 11 in a plan view a web of an embodiment of a packaging material according to the invention in the manner of a bubble wrap, Fig. 12 in comparison Fig. 11 greatly enlarged scale a section through the packaging material according to Fig. 11 in the area of ​​a characteristic and Fig. 13 in a similar representation as Fig. 1 a second embodiment of a device according to the invention.

[0067] Based on the Figuren 1 bis 10 A first embodiment of a device according to the invention for producing packaging material from paper is explained in more detail below.

[0068] In Fig. 1 An embodiment of a device or system according to the invention for producing packaging material from paper is shown in a highly schematic and sketchy manner. The operation of the system is briefly as follows: From storage rolls 2, 4, a first paper web 6 and a second paper web 8, which are also referred to below as "webs," are fed via deflections to a roller arrangement 10. The first paper web forms an "embossing web," from which impressions 11 are embossed by means of the roller arrangement 10, while the second paper web forms a smooth "carrier web," which carries the embossing web in the finished packaging material and, for this purpose, is pressed with the "embossing web" by means of the roller arrangement 10. The "embossing web" is preconditioned for embossing by vaporization with steam upstream of the roller arrangement 10 at reference numeral 12 in the feed direction.For example, and in particular, steam having a temperature between 100 °C and about 150 °C can be used.

[0069] In the illustrated embodiment, the paper webs 6, 8 are made of recycled paper. However, according to the invention, the paper webs 6, 8 can also be made of any other suitable paper, depending on the respective requirements and circumstances.

[0070] The "carrier web" is preconditioned in the feed direction upstream of the roller arrangement 10 at the reference numeral 14 by spraying with a liquid containing cellulose fibers or particles, in particular nanocellulose, preferably in the form of cellulose nanofibers (CNF).

[0071] The roller assembly 10 has an embossing roller (positive roller) 16, which engages a counter roller (negative roller) 18. The paper web 6 is embossed between the rollers 16, 18 to form the embossed portions. The embossing roller 16, the counter roller 18, and a press roller are also referred to below as "rollers" for short.

[0072] In The press roller 20 is in engagement with the counter roller 18, wherein between the counter roller 18 and the press roller 20 the paper webs 6, 8 are pressed together free of adhesive and connecting synthetic additional material, in particular free of plastic film.

[0073] The pressed paper webs 6, 8, which form the packaging material according to the invention in the manner of bubble wrap, are fed to a storage device 22 in the form of a storage roll for the finished bubble wrap-like packaging material consisting exclusively of paper. A multi-stage drying device with three dryers 24, 26, and 28 is arranged in the feed path. Dryer 24 is an IR radiator, while dryers 26 and 28 are hot-air dryers.

[0074] The detailed structural design of the device is as follows: The device has means for feeding at least the first paper web 6 and the second paper web 8 to an embossing area 30 and a pressing area 32 arranged downstream of the embossing area 30 in the feed direction of the paper webs. The feed direction or conveying direction of the paper webs 6, 8 or the pressed paper webs 6, 8 is in Fig. 1 marked by arrows 34, 36, 38 and 40.

[0075] In the embossing area 30, an embossing device 31 for embossing the first paper web is arranged such that embossed portions 11 are embossed from the first paper web 6. These embossed portions protrude beyond the first paper web 6 and are each delimited by a closed circumferential line in the plane of the first paper web 6. In the illustrated embodiment, the closed circumferential line is circular or approximately circular.

[0076] In the pressing area 32, a pressing device 33 is arranged for pressing the paper webs 6, 8 together in such a way and free of adhesive and connecting synthetic additional material, in particular free of plastic film, that in connecting sections between the formations, paper fibers of the first paper web 6 connect with paper fibers of the second paper web 8 and the paper webs 6, 8 delimit closed cavities in the area of ​​the formations.

[0077] In the feed direction upstream of the embossing area 30 and / or the pressing area 32, preconditioning means with at least one preconditioning device for preconditioning the first paper web 6 and / or the second paper web 8 are arranged.

[0078] According to the invention, at least one preconditioning device is designed for introducing or applying a liquid, in particular a preconditioning liquid consisting of or containing water, into or onto at least one of the paper webs 6, 8. In the illustrated embodiment, reference numeral 12 denotes a preconditioning device for introducing or applying water in the form of steam onto or into the first paper web 6 in order to precondition it for embossing in the embossing area 30.

[0079] According to the invention, at least one preconditioning device is designed and configured for spraying, atomizing or evaporating a preconditioning liquid in such a way that the preconditioning liquid is sprayed, atomized or vaporized onto the associated paper web.

[0080] In the illustrated embodiment, each of the paper webs 6, 8 is assigned a separate preconditioning device for the separate, in the illustrated embodiment different, preconditioning of the paper webs 6, 8.

[0081] In detail, the first preconditioning device 12 is assigned to the first paper web 6 and is arranged on the feed path of the first paper web to the embossing area 30, and a second preconditioning device 14 is assigned to the second paper web 8 and is arranged on the feed path of the second paper web 8 to the pressing area.

[0082] In the illustrated embodiment, the first preconditioning device 12 assigned to the first paper web 6 is designed to steam the first paper web with steam at a temperature between 100 °C and approximately 150 °C.

[0083] The second preconditioning device 14 assigned to the second paper web is designed and configured to apply or introduce a preconditioning liquid into or onto the second paper web 8. In the illustrated embodiment, the preconditioning liquid is water containing cellulose fibers or cellulose particles. The cellulose fibers or cellulose particles are preferably or contain microcellulose and / or nanocellulose, in particular cellulose microfibers (CMF) and / or cellulose nanofibers (CNF). The content of cellulose fibers in the preconditioning liquid is selected such that it is sprayable and is sprayed onto the second paper web 8.

[0084] In the embossing area 30, a roller arrangement 10 is arranged with an embossing roller 16 which is mounted rotatably about an embossing roller rotation axis 15 and has embossing projections on its peripheral surface for forming the impressions 11 in the first paper web 6, wherein the embossing roller 16 is in engagement with a counter-roller 18 which is mounted rotatably about an axis of rotation 19 parallel to the embossing roller rotation axis and has embossing recesses on its peripheral surface which are complementary to the embossing projections of the embossing roller 16.

[0085] In the pressing area 32, a pressing roller 20 is arranged which is rotatably mounted about a pressing roller rotation axis 21 and which cooperates with a counter-roller 18 for pressing the first paper web 6 with the second paper web 8, the axis of rotation of which is parallel to the pressing roller rotation axis and spaced such that a pressing roller gap is formed between the pressing roller 20 and the counter-roller 18 for pressing the first paper web 6 with the second paper web 8 away from the formations 11 in the first paper web 6.

[0086] The press roller 20 has a smooth circumferential surface and consists on its circumferential surface of an elastically flexible material, in the illustrated embodiment of silicone.

[0087] In the illustrated embodiment, the counter roll of the embossing roll 16 and the counter roll of the pressing roll 20 are formed by a common counter roll, namely the counter roll 18, such that the roller arrangement 10 has three rollers 16, 18, 20 that are operatively connected or engaged with one another. It can be seen that in the illustrated embodiment, the embossing roll 16 with the counter roll 18 forms the embossing device 31, and the pressing roll 20 with the counter roll 18 forms the pressing device 33.

[0088] It can be seen that in the illustrated embodiment, the counter roll 18 and the press roll 20 are in direct pressing engagement with one another, i.e., without the interposition of conveying paths for the first paper web 6 embossed by the embossing roll 16. In this way, the paper webs 6, 8 are pressed together while the impressions 11 embossed from the first paper web by the embossing roll 16 are still located in the embossing recesses of the counter roll 18. As a result, the roller arrangement 10 consisting of the rollers 16, 18, and 20 forms a combined embossing and pressing station.

[0089] As from Fig. 1 As can be seen, in the illustrated embodiment the rotational axis 19 of the counter-roller 18 is arranged on a connecting line between the embossing roll rotational axis 15 and the press roll rotational axis 21.

[0090] In the illustrated embodiment, the press roller 20 is assigned a preferably motor-operated adjustment device for adjusting the gap width of the press roller gap along a linear axis that, in this embodiment, runs radially relative to the press roller rotation axis 21. The adjustment device also makes it possible to disengage the press roller 20 from the counter roller 18 when a packaging material is to be produced that consists exclusively of a single web provided with embossing, i.e., exclusively of an "embossed web" without a "carrier web."

[0091] Furthermore, according to the invention, the embossing roller 16 and / or the counter-roller 18 and / or the press roller 20 are each assigned a heating device for heating the respective roller. In the illustrated embodiment, each of the rollers 16, 18, 20 is assigned a separate heating device so that the temperature for each of the rollers 16, 18, 20 can be adjusted separately. In this case, a temperature sensor for detecting the temperature of the respective roller 16 or 18 or 20 is preferably assigned to the embossing roller 16 and / or the counter-roller 18 and / or the press roller 20. It is advantageous if both the heating device, for example in the form of at least one electric heating rod, and the temperature sensor are integrated into the respective roller 16 or 18 or 20, as is the case in the illustrated embodiment. In this way, the structure of the device according to the invention is simplified.

[0092] According to the invention, drying means for drying the paper webs 6, 8 pressed together in the pressing area 32 are arranged in the feed direction between the pressing area 32 and a storage in the form of a storage roll 22 for the finished packaging material.

[0093] In the illustrated embodiment, the drying means comprise at least two drying devices spaced apart from one another in the feed direction or conveying direction, wherein at least one drying device is designed as an infrared radiation drying device and at least one drying device is designed as a warm air drying device. In the illustrated embodiment, a drying device 24 arranged directly downstream of the pressing area 32 is designed as an infrared radiation drying device, while two of the drying devices 26, 28 arranged downstream of the drying devices 24 in the feed direction or conveying direction can be designed as warm air drying devices.

[0094] The web tension of the individual paper webs 6 and 8 and / or the pressed paper webs is monitored by suitable sensors according to the respective requirements and conditions. This is explained below using Fig. 9 explained in more detail.

[0095] The rollers 16, 18, and 20 can be made of any suitable materials. In particular, the peripheral surfaces of the rollers 16, 18, and 20 can be made of a different material than the respective roller body or can be coated with a different material. In particular, the press roller 20 can be made of an elastically flexible material, in particular silicone, at least on its peripheral surface, as is the case in the illustrated embodiment. In contrast, the embossing roller 16 and the counter-roller 18 can be made of a dimensionally stable material, for example, metal, at least on their peripheral surface.

[0096] The rollers 16, 18, and 20 are each independently driven by a separate rotary drive device. The same applies to the storage rollers 2, 4, and 22, which are also independently driven by a separate rotary drive device. The control of the rotary drive devices assigned to the rollers 16, 18, and 20, and to the storage rollers 2, 4, and 22, respectively, is described below with reference to Fig. 11 explained in more detail.

[0097] Fig. 2 shows in a schematic side view the embodiment according to Fig. 1 , while Fig. 3 shows the embodiment in a schematic perspective view.

[0098] As in Fig. 2 and Fig. 3 As shown, the device has a frame 46 on which its various assemblies and components are arranged.

[0099] The first preconditioning device 12 has a housing 48. Excess water remaining after the first paper web 6 has been steamed is collected in the housing 48 or extracted as steam. It can be drained off and subsequently reused or disposed of. Since the excess water is free of chemical additives, it can be disposed of in the sewer system without polluting the environment.

[0100] Correspondingly, the second preconditioning device 14 has a housing 50. Excess preconditioning fluid remaining after preconditioning the second paper web 8 is collected in the housing 50 and can be drained off and subsequently reused or disposed of. Since the preconditioning fluid in the illustrated embodiment consists exclusively of water with added cellulose nanofibers and is thus free of chemical additives, it can also be disposed of in the sewer system without polluting the environment.

[0101] The reference number 52 in Fig. 2 and Fig. 3 a housing in which the roller arrangement 10 is accommodated.

[0102] Reference numerals 54 and 56 denote housings in which the warm-air drying devices 26 and 28, respectively, are accommodated. Liquid removed from the webs 6, 8 during drying in the warm-air drying devices 26, 28, which in the illustrated embodiment consists of water, can escape from the housings 54, 56, which are open for this purpose at their front and rear ends in the feed direction. As explained above with regard to the preconditioning devices 12, 14, the resulting liquid can also be disposed of in the sewer system without polluting the environment.

[0103] The reference numeral 58 denotes a web tension sensor arranged in the feed direction between the storage roll 2 and the first preconditioning device 12 for sensing or measuring the web tension of the first paper web 6. The structure of the web tension sensor 58 is explained below with reference to Fig. 10 explained in more detail. In a corresponding manner, a web tension sensor is assigned to the second paper web and designated by reference numeral 60. The web tension sensor 60 is constructed in a manner corresponding to the web tension sensor 58 and is therefore not explained in more detail.

[0104] All system parameters of the facility or system, in particular the feed speed or conveying speed of the paper webs, the web tension, the speed and temperature of the rollers 16, 18 and 20 and the operating parameters of the preconditioning devices 12, 14 as well as the drying devices 24, 26 and 28 are controlled by a central system control system, which is described below with reference to Fig. 11 is explained in more detail.

[0105] In Fig. 4 bis Fig. 8 the roller arrangement 10 as well as its embossing roller 16 and the counter roller 18 are shown in different views

[0106] Fig. 4 shows the roller arrangement 10 in a radial view

[0107] Fig. 5 shows the roller arrangement 10 in a perspective view.

[0108] Fig. 6 shows a radial sectional view of the roller assembly 10 along a line AA in Fig. 4 .

[0109] Fig. 7 shows the embossing roller 16 in a perspective view, wherein embossing projections provided on the circumferential surface of the embossing roller 16 and projecting beyond the circumferential surface can be seen, of which in Fig.. 7 Only one embossing projection is provided with the reference numeral 42. In the illustrated embodiment, the embossing projections 42 are spherical or have a spherical surface. In the illustrated embodiment, successive rows of embossing projections 42 are arranged in the circumferential direction of the embossing roller 16 on its circumferential surface, with successive rows in the circumferential direction being arranged in such a way that the embossing projections are arranged "with a gap" between them. The shape, geometry, and number of embossing projections can be selected within wide limits according to the respective requirements and conditions.

[0110] Fig. 8 shows the counter roller 18 in a perspective view, wherein the embossed recesses 44 of the counter roller 18 can be seen.

[0111] Out of Fig. 5 and Fig. 6 It can be seen that the press roller 20 has a smooth circumferential surface.

[0112] Fig. 9 shows the web tension sensor 58 in a schematic, sketch-like view. The web tension sensor 58 has three rotatably mounted, driveless deflection rollers 62, 64, 66, whose axes of rotation 68, 70, and 72 are in Fig. 10 into the plane of the drawing and are arranged at the corners of a triangle. The deflection rollers 62 and 66 are fixedly mounted, while the deflection roller 64 is mounted so as to be movable along a linear measuring axis 74 in the direction of a double arrow 76. The deflection roller 64 can be moved by spring means into a Fig. 9 starting position shown as an example. If the web tension of the first paper web 6 increases from this starting position, the deflection roller 64 moves into Fig. 9 upwards. This movement can be detected via a force sensor, for example using strain gauges, or in another way and fed as a sensor output signal from the web tension sensor 58 to a central control system of the device, which will be explained in more detail below.

[0113] Fig. 10 shows, in block diagram form, the structure of a central system control system of the facility, which has a control device 78. The control device 78 can be designed in a variety of ways using a combination of hardware and software, for example and in particular as a programmable logic controller (PLC), depending on the respective requirements and circumstances.

[0114] The storage rolls 2, 4 for the webs 6, 8 and the storage roll 22 for the finished packaging material are each assigned a rotary drive device 80, 82, or 84, respectively, which can be controlled by the control device 78. During operation of the device, the control device 78 regulates the speed of the rotary drive devices 80, 82, 84 such that the desired web tension of the paper webs 6, 8 is established. For this purpose, the web tension sensors 58, 60 are in signal transmission connection with the control device 78.

[0115] Each of the rollers 16, 18, 20 is assigned a rotary drive device 86, 88, or 90, which can be controlled by the control device 78. During operation of the device, the control device 78 regulates the speed of the rotary drive devices 86, 88, 90 such that the rollers 16, 18, 20 run synchronously for embossing the first web 6 in the embossing area 30 and for pressing the webs 6, 8 in the pressing area 32.

[0116] For heating the rollers 16, 18, 20, a heating device 92, 94, 96 is assigned to each of them, which is preferably integrated into the respective roller 16, 18, 20 and can be formed, for example and in particular, by at least one electric heating rod integrated into the respective roller 16, 18, 20.

[0117] To measure the temperature, each of the rollers 16, 18, 20 is assigned a temperature measuring device 98, 100, 102, which is preferably also integrated into the respective roller 16, 18, or 20, for example in the form of a temperature sensor. The temperature measuring devices 98, 100, 102 are in signal transmission connection with the control device 78. During operation of the device, the control device 78 regulates the temperature of the rollers 16, 18, 20 by appropriately controlling the heating devices 92, 94, 96. The temperature can be regulated in particular such that the temperature of the embossing roller 16 is higher than the temperature of the counter-roller 18 and the temperature of the counter-roller 18 is higher than the temperature of the press roller 20, so that a temperature gradient exists from the embossing roller 16 to the press roller 20.

[0118] The reference number 104 denotes Fig. 10 a motorized adjustment device for adjusting the gap width of the press roll nip along a linear axis extending radially to the press roll rotation axis 21. The motorized adjustment device can also be controlled by the control device 78, for example, to adapt the gap width of the press roll nip to paper webs of different thicknesses or to disengage the press roll 20 from the counter roll 18 if the device is to be used to produce packaging material that consists exclusively of a single "embossed web" provided with embossings without a "carrier web."

[0119] By means of a method according to the invention, a packaging material according to the invention in the form of a bubble wrap is produced using the device according to the invention.

[0120] In Fig. 11 1 shows an exemplary blank 106 of a corresponding bubble wrap-like packaging material, wherein it can be seen that the packaging material is provided with a grid-like, knob-like formations 11. The packaging material according to the invention is similar in its structural design to a conventional plastic bubble wrap, but differs from it in that it consists exclusively of paper or cellulose.

[0121] Out of Fig. 11 It can be seen that the embossings 11 in the paper web plane of the "embossing web" 6 are each delimited by a closed circumferential line, which in the illustrated embodiment is circular or approximately circular.

[0122] Fig. 12 12 shows a section through the packaging material on a scale greatly enlarged compared to FIG. 12. It can be seen that the protrusion 11 in the first paper web 6 defines a closed cavity 108 with the smooth second paper web 8. Away from the protrusions 11, the paper webs 6, 8 are pressed together in web-like connecting sections 110, 112.

[0123] In the illustrated embodiment, recycled paper is used for the paper webs 6, 8, which has at least one, in particular all of the following characteristics: Specific weight / grammage [ISO 536]: 60 - 140 g / m 2 < Water absorption according to Cobb 60 [ISO 535]: 26 - 113 g / m 2 < Roughness according to Bendtsen [ISO 8791-2]: ≥ 300 ml / min Bursting strength [ISO 2758]: 160 - 240 kPa SCT-cross INDEX [ISO 9895]: 1.1 - 1.9 kN / m

[0124] Depending on the respective requirements and circumstances, other paper types or grades can also be used for the paper webs 6, 8. In particular, the paper webs 6, 8 can consist of the same paper type. However, according to the invention, it is also possible to use different paper types for the paper webs 6, 8.

[0125] In Fig. 13 A second embodiment of a device according to the invention is shown, which differs from the first embodiment primarily in that the pressing area 32 of the device is spaced apart from the embossing area 30 in the feed direction or conveying direction of the webs 6, 8. Due to the spatial spacing of the pressing area 32 from the embossing area 30, in this embodiment the embossing roller 16 and the pressing roller 18 do not have a common counter-roller. Rather, the embossing roller 16 is assigned the counter-roller 18, and the pressing roller 20 is assigned a separate counter-roller 114.

[0126] While in the first embodiment according to Fig. 1 bis 10 the rollers 16, 18, 20 of the roller arrangement 10 form a combined embossing and pressing station, the second embodiment has an embossing station (embossing roller 16 / counter roller 18) and a pressing station (pressing roller 20 / counter roller 114) spatially separated from one another in the feed direction or conveying direction to the embossing station.

Claims

1. A device for producing packaging material from paper, with means for feeding at least one first paper web (6) and one second paper web (8) to an embossing region (30) and to a pressing region (32) downstream of the embossing region (30) in the feed direction of the paper webs (6, 8), with an embossing apparatus (16, 18) arranged in the embossing region (30) of the device for embossing the first paper web (6), wherein the embossing apparatus is designed and set up in such a way that shaped regions (11) are created from the first paper web (6) and project beyond the first paper web (6) and each being limited by a closed circumferential line in the paper web plane of the first paper web (6), with a pressing apparatus (20, 18) arranged in the pressing region (32) of the device for press-fitting the paper webs (6, 8) free of adhesive and connecting synthetic auxiliary material, in particular free of plastics film, wherein the paper webs (6, 8) limit closed cavities (108) in the region of the shaped regions (11), and with preconditioning means arranged in the feed direction upstream of the embossing region (30) and / or the pressing region (32) with at least one preconditioning apparatus (12) for preconditioning the first paper web (6) and / or the second paper web (8) for embossing the first paper web (6) or press-fitting the paper webs (6, 8) together, characterized in that the pressing apparatus (20, 18) is designed and set up in such a way that, in connecting portions (110, 112) between the shaped regions (11), paper fibers of the first paper web (6) are connected to paper fibers of the second paper web (8).

2. The device according to claim 1, wherein at least one preconditioning apparatus (12, 14) is designed and set up for applying or introducing a preconditioning liquid, which is or contains preferably water, onto or into at least one of the paper webs (6, 8), wherein preferably at least one preconditioning apparatus (12, 14) is designed and set up for spraying, nebulizing or evaporating a preconditioning liquid in such a way that the preconditioning liquid is sprayed, nebulized or evaporated onto the associated paper web (6 or 8), wherein preferably at least one preconditioning apparatus (12) of the at least one preconditioning apparatus (12, 14), in particular associated with the first paper web (6), is designed and set up for steaming the associated paper web (6) with steam, and / or preferably wherein each of the paper webs (6, 8) is associated with a separate preconditioning apparatus (12 or 14) of the at least one preconditioning apparatus (12, 14) for separate, in particular, different preconditioning of the paper webs (6, 8), wherein preferably the first paper web (6) is associated with a first preconditioning apparatus (12) of the at least one preconditioning apparatus (12, 14) which is arranged on the feed path of the first paper web (6) to the embossing region (30), and wherein the second paper web (8) is associated with a second preconditioning apparatus (14) of the at least one preconditioning apparatus (12, 14) which is arranged on the feed path of the second paper web (8) to the pressing region (32).

3. The device according to claim 1 or 2, wherein at least one preconditioning apparatus of the at least one preconditioning apparatus (12, 14), in particular, a preconditioning apparatus (14) of the at least one preconditioning apparatus (12, 14) associated with the second paper web (8), is designed and set up for introducing or applying a preconditioning liquid, preferably water, that contains cellulose fibers or cellulose particles, wherein the cellulose fibers or cellulose particles preferably are or contain microcellulose and / or nanocellulose, in particular, cellulose microfibers (CMF) and / or cellulose nanofibers (CNF).

4. The device according to any one of the preceding claims, wherein a roller arrangement (10) with an embossing roller (16), which is rotatably mounted about an embossing roller axis of rotation (15) and has embossing projections (42) on its circumferential surface for forming the shaped regions (11) in the first paper web (6), is arranged in the embossing region (30), wherein the embossing roller (16) is engaged with a counter roller (18) which is rotatably mounted about an axis of rotation (19) parallel to the embossing roller axis of rotation and has embossing recesses (44) on its circumferential surface which are designed to be complementary to the embossing projections (42) of the embossing roller, and / or a press roller (20) which is rotatably mounted about a press roller axis of rotation (21) is arranged in the pressing region (32) and which, for press-fitting the first paper web (6) with the second paper web (8), cooperates with a rotatably mounted counter roller (18), the axis of rotation (19) of which is parallel relative to the press roller axis of rotation (21) and spaced apart in such a way that a press roller gap is formed between the press roller (20) and the counter roller (18) for press-fitting the first paper web (6) with the second paper web (8) away from the shaped regions in the connecting portions of the paper webs (6, 8).

5. The device according to claim 4, wherein the counter roller of the embossing roller (16) and the counter roller of the press roller (20) are formed by a common counter roller (18), such that the roller arrangement (10) has three rollers (16, 18, 20) that are operatively engaged with one another, wherein preferably the counter roller (18) axis of rotation (19) is arranged on a straight connecting line between the embossing roller axis of rotation of the (15) and the press roller axis of rotation of the (21).

6. The device according to claim 4 or 5, wherein a preferably motor-driven adjustment apparatus (104) is associated with the press roller (20) for setting the gap width of the press roller gap along a linear axis running radially relative to the press roller axis of rotation (21), and / or a heating device for heating the respective rollers (16, 18, 20) is associated with the embossing roller (16) and / or the counter roller (18) of the embossing roller (16) or the counter roller (18) of the press roller (20) and / or the press roller (20) for setting the temperature of the rollers (16, 18, 20) preferably separately, and / or at least one temperature sensor (98 or 100 or 102) is associated with the embossing roller (16) and / or the counter roller (18) of the embossing roller (16) or the counter roller (18) of the press roller (20) and / or the press roller (20), respectively, for detecting the temperature of the respective roller (16 or 18 or 20).

7. The device according to any one of the preceding claims, wherein drying means for drying the paper webs (6, 8), that were press-fitted against each other in the pressing region (32), are arranged in the feed direction between the pressing region (32) and the storage means for the finished packaging material, wherein preferably the drying means has at least two drying apparatuses (24, 26, 28), which are spaced apart from one another in the feed direction, and / or at least one drying apparatus is designed as an infrared radiation device (24) and at least one drying apparatus (26, 28) is designed as a hot-air drying apparatus.

8. The device according to any one of claims 4 to 7, wherein the press roller (20) consists of an elastic, flexible material, in particular, silicone, at least on its circumferential surface.

9. A method for producing packaging material from paper, wherein at least one first paper web and at least one second paper web are fed to an embossing region and a pressing region downstream of the embossing region in the feed direction of the paper webs, wherein shaped regions are created from the first paper web in the embossing region by means of an embossing apparatus, the shaped regions projecting beyond the first paper web, and wherein each is limited by a closed circumferential line in the paper web plane of the first paper web, wherein the paper webs, free of adhesive and connecting synthetic auxiliary material, in particular, free of plastics film, are press-fitted against each other in the pressing region by means of a pressing apparatus, wherein the paper webs limit closed cavities in the region of the shaped regions, and wherein, in preparation of the embossing action in the embossing region or press-fitting action of the paper webs in the pressing region, the first paper web and / or the second paper web are / is preconditioned, characterized in that the paper webs are press-fitted against each other in such a way that in connecting portions between the shaped regions, paper fibers of the first paper web connect to paper fibers of the second paper web.

10. The method according to claim 9, wherein at least one of the paper webs is preconditioned by introducing or applying a preconditioning liquid thereto, which is preferably water or contains water, wherein preferably the preconditioning liquid is sprayed, nebulized or evaporated onto the associated paper web, wherein preferably the first paper web is steamed with steam for preconditioning the same, and / or wherein preferably the paper webs are preconditioned by means of separate preconditioning apparatuses; in particular, they are preconditioned differently, and / or preferably the first paper web is preconditioned by means of a first preconditioning apparatus, which is arranged on the feed path of the first paper web to the embossing region, and the second paper web is preconditioned by means of a second preconditioning apparatus, which is arranged on the feed path of the second paper web to the pressing region.

11. The method according to claim 9 or 10, wherein at least one paper web, in particular, the second paper web, is preconditioned by introducing or applying a preconditioning liquid thereto, preferably water, which contains cellulose fibers or cellulose particles, preferably microcellulose and / or nanocellulose, in particular, cellulose microfibers (CMF) and / or cellulose nanofibers (CNF).

12. The method according to any one of claims 9 to 11, wherein a roller arrangement with an embossing roller, which is mounted rotatably about an embossing roller axis of rotation, is used in the embossing region, and which has embossing projections on its circumferential surface for forming the shaped regions in the first paper web, wherein the embossing roller is engaged with a counter roller which is rotatably mounted about an axis of rotation parallel relative to the embossing roller axis of rotation and has embossing recesses on its circumferential surface which are designed to be complementary to the embossing projections of the embossing roller, and / or wherein a press roller, which is rotatably mounted about a press roller axis of rotation, is used in the pressing region, and which, for press-fitting the first paper web with the second paper web, cooperates with a counter roller, the axis of rotation of which is spaced apart from the press roller axis of rotation in such a way that a press roller gap is formed between the press roller and the counter roller for press-fitting the first paper web with the second paper web, away from the shaped regions, in the connecting portions of the first paper web, wherein preferably a common counter roller is used as the counter roller of the embossing roller and as the counter roller of the press roller, such that the roller arrangement has three rollers that are operatively engaged with one another, wherein preferably the counter roller axis of rotation is arranged on a straight connecting line between the embossing roller axis of rotation and the press roller axis of rotation.

13. The method according to any one of claims 9 to 12, wherein a press roller with a preferably motor-driven adjustment apparatus is used for setting the gap width of the press roller gap along a linear axis running radially relative to the press roller axis of rotation, and / or the embossing roller and / or the counter roller of the embossing roller (16) or the counter roller (18) of the press roller (20) and / or the press roller is / are heated, wherein preferably the temperature(s) of the embossing roller and / or the counter roller and / or the press roller is / are measured.

14. The method according to any one of claims 9 to 13, wherein the paper webs, press-fitted against each other in the pressing region, are dried, in the feed direction, between the pressing region and a storage space for the finished packaging material, wherein preferably the paper webs, press-fitted against each other, are dried in several stages by at least two drying apparatuses spaced apart from one another in the feed direction, wherein preferably the paper webs, press-fitted against each other, are dried by means of at least one drying apparatus designed as an infrared radiation device and by at least one drying apparatus designed as a hot air drying apparatus.

15. The method according to any one of claims 9 to 14, wherein a press roller is used which consists of an elastically flexible material, in particular, silicone, at least on its circumferential surface.

16. A method for producing packaging material from paper using a device according to any one of claims 1 to 8.

17. A packaging material made of paper, with a first paper web (6) and with a second paper web (8), wherein shaped regions (11) are created from at least one paper web (6), the shaped regions projecting beyond the paper web (6) and each being limited by a closed circumferential line in the paper web plane, wherein the paper webs (6, 8), on their surfaces facing one another, are made exclusively of paper and press-fitted against each other free of adhesive and connecting synthetic auxiliary material, in particular free of plastics film, wherein the paper webs (6, 8) limit closed cavities (108) in the region of the shaped regions (11), wherein preferably the circumferential line limiting a shaped region (11) is, in each case, circular or approximately circular, such that the shaped regions (11) - are formed like spherical surfaces, - and / or form a regular pattern, in particular, they are arranged in rows and / or columns, characterized in that the paper webs are press-fitted against each other in such a way that, in such a way that in connecting portions (110, 112) between the shaped regions (11), paper fibers of the first paper web (6) are connected to paper fibers of the second paper web (8).

18. The packaging material according to claim 17, characterized in that the paper webs (6, 8) consist of recycled paper, wherein preferably the recycled paper has at least one, in particular all of the following characteristic parameters: - specific basis weight / grammage [ISO 536]: 60 - 140 g / m2 - water absorption according to Cobb60 [ISO 535]: 26 - 113 g / m2 - roughness according to Bendtsen [ISO 8791-2]: ≥ 300 ml / min - bursting strength [ISO 2758]: 160 - 240 kPa - SCT INDEX in cross direction [ISO 9895]: 1.1 - 1.9 kN / m.

19. The packaging material according to claim 17 or 18, characterized in that the connecting portions (110, 112) between the shaped regions (11) are designed in a web-like manner.

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