WO2022129580A1

WO2022129580A1 - Method for joining at least two packaging plies based on cellulose fibre material, more particularly on fibrous materials, and processing tool for performing the method

Info

Publication number: WO2022129580A1
Application number: PCT/EP2021/086604
Authority: WO
Inventors: Matthias KLAUSER
Original assignee: Syntegon Technology Gmbh
Priority date: 2020-12-17
Filing date: 2021-12-17
Publication date: 2022-06-23
Also published as: DE102020133987A1

Abstract

The invention relates to a method for joining to each other at least two packaging plies (12, 14) based on cellulose fibre material, more particularly packaging paper plies, more particularly in a manner free from any adhesive or free from glue, wherein, in at least one method step (16) at least one packaging ply (12, 14) of the at least two packaging plies (12, 14) is embossed in the region of a joint (18) at which the at least two packaging plies (12, 14) are joined by means of a processing tool, more particularly a sealing tool, comprising an embossing structure (20). According to the invention, in at least one method step (28) prior to embossing, at least one packaging ply (12, 14) of the at least two packaging plies (12, 14) is moistened in the region of the joint (18), more particularly with water or water mixed with at least one additive, more particularly sugar, starch, surfactants or the like.

Description

description

Method for joining at least two packaging layers based on cellulose fiber material, in particular on fibrous materials, and processing tool for carrying out the method

State of the art

DE 10 2015 223 070 A1 already discloses a method for joining at least two packaging layers based on cellulose fiber material, in particular packaging paper layers, to one another, in particular without an adhesive or glue. In addition, from the

DE 10 2015 223 070 A1 also already discloses a processing tool for connecting at least two packaging layers based on cellulose fiber material. Furthermore, DE 699 00 789 T2, DE 34 38 213 A1, DE 39 32 632 A1, DE 19 96 819 U and US Pat in at least one method step, at least one packaging layer of the at least two packaging layers is embossed in the region of a connection point of the at least two packaging layers by means of a processing tool, in particular a sealing tool, comprising an embossing structure.

Disclosure of Invention

The invention is based on a method for joining at least two packaging layers based on cellulose fiber material, in particular fibrous materials, in particular packaging paper layers, to one another, in particular free of an adhesive or free of a glue, wherein in at least In a method step, at least one packaging layer of the at least two packaging layers is embossed in the area of a connection point of the at least two packaging layers by means of a processing tool, in particular a sealing tool or joining tool, comprising an embossing structure.

It is proposed that in at least one method step before embossing, at least one packaging layer of the at least two packaging layers is moistened in the area of the connection point, in particular with water or water mixed with at least one additive, in particular sugar, starch, surfactants or the like. Alternatively, in at least one method step before embossing, the at least two packaging layers are moistened in the area of the connection point, in particular with water or water mixed with additives, in particular sugar, starch, surfactants or the like. Moistening of the at least one packaging layer of the at least two packaging layers, in particular both packaging layers, can be implemented by spraying, steaming, rolling, a water bath or by another option considered reasonable by a person skilled in the art. Water or water mixed with at least one additive is preferably applied to the at least one packaging layer of the at least two packaging layers or to both packaging layers or introduced between the two packaging layers by means of a moistening device in the area of the connection point. The moistening device can be designed separately from the processing tool or at least partially integrated into the processing tool. The water or the water to which at least one additive has been added is preferably provided as a softener or to soften or partially dissolve constituents of the packaging layer based on cellulose fiber material, in particular packaging layers. In particular, the water or the water mixed with at least one additive is provided as a softener or to soften or partially dissolve the constituents of the fibrous materials, such as cellulose, waste paper or wood pulp. By means of the configuration according to the invention, reliable interlocking of fibers of the packaging layers can advantageously be achieved during connection of the at least two packaging layers based on cellulose fiber material, in particular since the action of the processing tool ensures reliable distribution of the medium provided for moistening the packaging layers can be achieved and thus advantageously an interlocking of fibers of the packaging layers can be realized.

It is conceivable that the at least one packaging layer of the at least two packaging layers is embossed in the area of the connection point during connection or before connection using the processing tool. The at least two, in particular both, packaging layers are preferably embossed in the region of the connection point of the at least two packaging layers by means of the processing tool comprising the embossing structure, in particular by means of the sealing tool. It is conceivable that the at least two packaging layers are embossed in the area of the connection point of the at least two packaging layers during connection or before connection using the processing tool. An embossing, in particular an embossing pattern, is preferably introduced into the at least two packaging layers in the region of the connection point of the at least two packaging layers by means of the processing tool. The at least two packaging layers are preferably embossed together during connection by means of the processing tool. The embossing, in particular the embossing pattern, can have any form that a person skilled in the art deems useful, such as a line shape, in particular a parallel line shape, a zigzag pattern, a diamond pattern or the like. The at least two packaging layers are preferably caused by the action of the processing tool , in particular the embossed structure, is moved relative to one another and/or deformed together during a connection of the at least two packaging layers in the region of the connection point of the at least two packaging layers. In particular, using the method with a maximum total width of the connection point of 15 mm, a strength, in particular a peel strength according to DIN 55529, in the area of the connection point of in particular more than 1 N, preferably more than 3 N, particularly preferably more than 6 N and very particularly preferably less than 50N.

More than 50%, preferably more than 70%, particularly preferably more than 80% and very particularly preferably 99.9% of the packaging layers are made of paper. The packaging layers are preferably designed as packaging paper layers. However, it is also conceivable that the packaging layers as cardboard packaging layers, as a packaging cardboard, as Non-woven packaging paper layers or other packaging layers based on cellulose fiber material that appear sensible to a person skilled in the art. The packaging layers are preferably polymer-free. In particular, the packaging layers are designed without a thermoplastic layer or any other sealing layer already known to a person skilled in the art. However, it is conceivable that the packaging layers have at least one barrier layer, which is intended as a barrier against oxygen, against water vapor, against condensate or the like, as a grease barrier, as a moisture barrier or as another barrier that a person skilled in the art considers sensible. “Provided” is to be understood as meaning in particular specially designed, specially furnished and/or specially equipped. The fact that an object is provided for a specific function is to be understood in particular to mean that the object fulfills and/or executes this specific function in at least one application and/or operating state. The method is preferably provided for connecting at least two fibrous materials of the same or different grammage, density, surface roughness. The two fibrous materials can be produced by different production methods already known to a person skilled in the art. For example, the process can be used to connect pulp with mechanical pulp, mechanical pulp with waste paper pulp, waste paper pulp with pulp or other fibrous materials that appear sensible to a person skilled in the art. It is also conceivable that a connection can be produced between paper and cardboard or paper and corrugated cardboard or paper, cardboard and corrugated cardboard.

The packaging layers are preferably connected to one another without an adhesive or glue, in particular as a result of the processing tool acting on the packaging layers in the region of the connection point of the packaging layers. At least one of the two packaging layers is preferably wetted or moistened in the area of the connection point of the packaging layers with an adhesive- and/or glue-free, in particular liquid or pasty, medium, in particular before the packaging layers are connected to one another using the processing tool. Primary packaging, such as bag packs, cups, cup-like packaging, in particular bowls, plates, trays or the like, can preferably be produced from the packaging layers. The packaging layers are preferably connected to one another by means of the processing tool in such a way that the packaging layers gene primary packaging can be produced. At least one connecting seam, in particular at least one top, transverse and/or longitudinal sealing seam or longitudinal joining seam, is preferably produced during the joining of the at least two packaging layers, in particular by means of the processing tool. In particular, a lid is sealed or joined, in particular when the primary packaging is configured as a cup, or a head transverse and/or longitudinal joint seam is produced, particularly when the primary packaging is configured as a bag. To produce an initial package, the packaging layers are preferably folded in a manner already known to a person skilled in the art and provided with so-called top, transverse and/or longitudinal sealing seams. The top, transverse and/or longitudinal sealing seams are preferably produced using the processing tool. The primary packaging produced from the packaging layers preferably has embossed top, transverse and/or longitudinal sealing seams. The primary packaging made from the packaging layers is preferably intended to hold products designed as food, such as chocolate bars, chocolate bars, biscuits, biscuits, cereal bars, fitness bars, effervescent powders, muesli, flour, sugar or the like. The method is preferably part of a packaging and/or filling process in the food industry. In particular, the method and the primary packaging are also suitable for the following products, such as blister packs for electronics, drugstore products, hygiene products, cosmetic products, and the like. Medical products can also be packaged with it.

The configuration according to the invention advantageously enables a secure connection of the at least two packaging layers based on cellulose fiber material to be achieved, in particular since the embossing can be used to implement an interlocking, in particular connection, of fibers of the packaging layers. Advantageously, a large surface area of the joint can be achieved, in particular thereby a high probability can be achieved that fibers will adhere to each other and form a permanent bond which is equal to adhesion of fibers in an original paper structure, particularly in terms of strength. A strength of the connection can advantageously be adjusted by the method. It can advantageously be a cost-effective solution for a connection of the at least two based on cellulose fiber material ing packaging layers can be achieved. A secure connection of the at least two packaging layers based on cellulose fiber material can advantageously be achieved with an advantageously low outlay on control or regulation of a device, in particular a food packaging system or a food filling system. An environmentally friendly and easy-to-recycle primary packaging can advantageously be produced by means of the method according to the invention.

Furthermore, it is proposed that the embossed structure acts at least from one side on the at least one packaging layer of the at least two packaging layers, in particular on both packaging layers. In particular, the embossing structure, in particular in at least one configuration of the method, acts directly on one, in particular a single, outer surface of the at least one packaging layer of the at least two packaging layers. The at least one packaging layer of the at least two packaging layers, in particular both packaging layers, is preferably arranged between a processing tool part and a further processing tool part of the processing tool, with the embossed structure being attached at least partially, in particular completely, to the processing tool part and the further processing tool part being free, in particular as far as possible is formed by the embossed structure. The additional machining tool part preferably forms a contact surface or a counter-pressure surface. It is conceivable that the additional processing tool part has an elastic or rigid area, at least in the area where the processing tool part acts on the packaging layer arranged between the processing tool part and the additional processing tool part, in particular the packaging layers. The machining tool part on which the embossing structure is arranged at least partially, in particular completely, preferably forms a stamp. The additional machining tool part preferably forms a die, in particular when the machining tool part is configured as a punch. It is also conceivable, however, for the processing tool part and the further processing tool part to have a different design that appears sensible to a person skilled in the art, such as a design as sealing jaws, as rollers or the like. Preferably, the at least two packaging layers are for connecting the at least two packaging layers between see the machining tool part and the further machining tool part of the machining tool arranged. When the embossed structure acts on the two packaging layers at least from one side, an embossing that can be produced by the embossed structure as a result of a force exerted by the processing tool on the at least one packaging layer of the at least two packaging layers via the at least one packaging layer of the at least two packaging layers on the other of the at least two packaging layers is preferred Transfer packaging layers. The other of the at least two packaging layers is preferably embossed over the at least one packaging layer when the embossing structure acts from one side on the at least one packaging layer. By means of the configuration according to the invention, a cost-effective solution for connecting the at least two packaging layers based on cellulose fiber material can advantageously be achieved, in particular since the embossing structure is only arranged on one processing tool part.

It is also proposed that the embossed structure acts on the at least one packaging layer of the at least two packaging layers, in particular on both packaging layers, from two sides. In particular, the embossed structure, in particular in at least one embodiment of the method, acts directly on two outer surfaces, in particular facing away from each other, of the at least one packaging layer of the at least two packaging layers, in particular when the embossing is introduced before the at least two packaging layers are connected. When the embossing is applied while the at least two packaging layers are being joined, the embossed structure preferably acts directly on an outer surface of the at least one packaging layer and directly on an outer surface of the other packaging layer of the at least two packaging layers, with the outer surface of the at least one packaging layer and the outer surface of the other Packing layer are aligned away from each other. Both packaging layers are preferably arranged, in particular spatially, between the processing tool part and the further processing tool part, the embossing structure being arranged at least partially on the processing tool part and at least partially on the further processing tool part. The machining tool part on which the embossing structure is at least partially arranged preferably forms a stamp. The further machining tool part on which the embossing structure is at least partially attached is assigned, preferably forms a matrix or a counter-punch. It is also conceivable, however, for the processing tool part and the further processing tool part to have a different design that appears sensible to a person skilled in the art, such as a design as sealing jaws, as rollers or the like outer surface of the at least one packaging layer and the embossing structure at least partially arranged on the further processing part preferably acts on an outer surface of the further packaging layer. The embossing structure is preferably arranged on the processing tool part and the further processing tool part in such a way that they complement each other for embossing in the connected packaging layers. By means of the configuration according to the invention, a secure connection of the at least two packaging layers based on cellulose fiber material can advantageously be achieved, in particular since the fibers of the packaging layers can be interlocked by the embossing. A secure connection of the at least two packaging layers based on cellulose fiber material can advantageously be achieved with an advantageously low outlay on control or regulation of a device, in particular a food packaging system or a food filling system.

Furthermore, it is proposed that an embossing time in which the at least one packaging layer of the at least two packaging layers is embossed by means of an action of the processing tool on the at least one packaging layer of the at least two packaging layers is less than 2.5 s. An embossing time in the two packaging layers are embossed by an action of the processing tool on both packaging layers, less than 2.5 s. In particular, the embossing time is less than 1.5 s, preferably less than 1 s and particularly preferably less than 0.5 s Imprint time a value from a value range of 0.2 s to 2 s. By means of the configuration according to the invention, a secure connection of the at least two packaging layers based on cellulose fiber material can advantageously be achieved, in particular since an advantageous deformation of the packaging layers and thus an advantageous interlocking of fibers of the packaging layers can be realized by the action of the embossing structure within the embossing time. Beneficial comes the embossing process leads to a connection of the fibers at deformation points, in particular at the connection point.

It is also proposed that the at least two packaging layers, in particular in the area of the connection point of the at least two packaging layers, be subjected to a pressure of more than 1.5 N/mm ² by means of the processing tool in order to create a connection between the at least two packaging layers. In particular, the at least two packaging layers, in particular in the area of the connection point of the at least two packaging layers, are used to create a connection between the at least two packaging layers using the processing tool with a pressure of more than 5 N/mm ² , preferably more than 15 N/mm ² , particularly preferably more than 30 N/mm ² and very particularly preferably less than 250 N/mm ² . The at least two packaging layers, in particular in the area of the connection point of the at least two packaging layers, are preferably subjected to a pressure by means of the processing tool in order to create a connection between the at least two packaging layers and which has a value from a value range of 20 N/mm ² to 100 N/mm mm ² corresponds. Preferably, the pressure with which the at least two packaging layers are applied in the area of the connection point during the production of a connection between the at least two packaging layers by means of the processing tool is dependent on a force by which the processing tool acts on the at least two packaging layers and on a size a surface of the junction of the at least two packaging layers. By means of the configuration according to the invention, a secure connection of the at least two packaging layers based on cellulose fiber material can advantageously be achieved, in particular since the action of the processing tool can reliably emboss the packaging layers and thus advantageously cause the fibers of the packaging layers to interlock.

In addition, it is proposed that the processing tool is subjected to a force of more than 15 kN while it is acting on the at least two packaging layers in order to connect the at least two packaging layers. In particular, the processing tool is used while acting on the at least two packaging layers to connect the respective at least two packaging layers are subjected to a force of more than 18 kN, preferably more than 20 kN and particularly preferably less than 100 kN. The force by which the processing tool is applied to connect the at least two packaging layers is preferably monitored, in particular directly via a force sensor or indirectly via a determination based on other parameters of the processing tool that appear reasonable to a person skilled in the art or a drive device moving the processing tool, such as for example a press, a hydraulic cylinder, a pneumatic cylinder or the like. Using the configuration according to the invention, a secure connection and/or interlocking of fibers of the packaging layers can advantageously be achieved during connection of the at least two packaging layers based on cellulose fiber material. Advantageously, a secure connection of the packaging layers can be achieved, in particular since the action of the processing tool can achieve reliable distribution of a medium provided for moistening the packaging layers and thus advantageously intermeshing of fibers of the packaging layers can be achieved.

It is also proposed that the processing tool and/or the at least two packaging layers have/have a temperature of less than 250° C., in particular less than 200° C., during a connection of the at least two packaging layers. The processing tool and/or the at least two packaging layers are/are preferably heated to a temperature of less than 250° C., in particular of less than 200° C., before the at least two packaging layers are connected. In particular, the processing tool and/or the at least two packaging layers have a temperature of less than 200 °C, preferably less than 150 °C, particularly preferably less than 100 °C and very particularly preferably more than 200 °C while the at least two packaging layers are being connected 10°C. The processing tool and/or the at least two packaging layers preferably have/have a temperature with a value from a value range of 15° C. to 200° C. during connection. The at least two packaging layers are preferred, in particular after wetting with water or water mixed with at least one additive and after heating, by means of the processing tool acting on the at least two packaging layers embossed and connected to each other. By means of the configuration according to the invention, a secure interlocking of fibers of the packaging layers can advantageously be achieved during a connection of the at least two packaging layers based on cellulose fiber material, in particular because heating the processing tool and/or the packaging layers results in an advantageously uniform distribution of the medium intended for moistening in the packaging layers can be reached.

In addition, the invention is based on a processing tool, in particular the aforementioned processing tool, in particular a sealing tool or a joining tool, for connecting at least two packaging layers based on cellulose fiber material, in particular packaging paper layers, to one another according to a method according to the invention, with at least one processing tool part , in particular with at least one sealing tool part, and with an embossing structure, in particular the one already mentioned above, which is at least partially arranged on the processing tool part, in particular on the sealing tool part. It is proposed that the processing tool comprises at least one further processing tool part, in particular a further sealing tool part, which cooperates with the processing tool part, in particular the sealing tool part, to emboss the at least two packaging layers in the area of a connection point of the at least two packaging layers, with the further processing tool part in particular when the embossing structure is at least partially arranged on the further processing tool part, has a configuration that is complementary to the processing tool part, wherein the at least two packaging layers can be pressed and/or deformed into a receptacle of the further processing tool part for connection by means of an extension of the processing tool part. The embossed structure can have any design that a person skilled in the art deems appropriate, such as a design with parallel embossing lines, a design with crossed embossed lines, a design as a honeycomb embossed structure or the like the embossing structure is arranged. The extension preferably has a polygonal cross section. However, it is also conceivable that the extension has a circular sector shaped, in particular a semi-circular, cross-section or another cross-section that appears reasonable to a person skilled in the art. The configuration according to the invention can advantageously provide a processing tool that can enable a secure connection of the at least two packaging layers based on cellulose fiber material, in particular since the fibers of the packaging layers can be interlocked by embossing. A cost-effective processing tool can advantageously be implemented for connecting the at least two packaging layers based on cellulose fiber material.

Furthermore, it is proposed that the processing tool comprises at least the further processing tool part, in particular at least the further sealing tool part, which cooperates with the processing tool part, in particular with the sealing tool part, to emboss the at least two packaging layers in the area of a connection point of the at least two packaging layers, wherein the The embossing structure is arranged at least partially on the processing tool part, in particular on the sealing tool part, and at least partially on the further processing tool part, in particular on the further sealing tool part, or the embossing structure is arranged, in particular completely, on the processing tool part, in particular on the sealing tool part, and the other Processing tool part, in particular the further sealing tool part, has a deformation element which is designed to be elastic. The machining tool part and the further machining tool part are preferably mounted such that they can move relative to one another, in particular in a translatory and/or rotary manner. The additional machining tool part preferably has a configuration that is complementary to the machining tool part, in particular when the embossing structure is at least partially arranged on the additional machining tool part. Preferably, the additional machining tool part, in particular when the embossing structure is at least partially arranged on the additional machining tool part, comprises at least one receptacle which is designed to complement the extension of the machining tool part. The receptacle is designed in the form of a channel, for example. The extension of the processing tool part preferably engages in the receptacle of the further processing tool part while the at least two packaging layers are being connected. Preferably, the at least at least two packaging layers are pressed and/or deformed into the receptacle of the further processing tool part for connection by means of the extension of the processing tool part. However, it is also conceivable that the machining tool part and the further machining tool part are designed as rotating rollers, with the embossing structure being arranged at least partially on an outer surface of the machining tool part and/or on an outer surface of the further machining tool part. In particular, the machining tool part and the further machining tool part are also mounted in a configuration as rollers so that they can move relative to one another in a translatory manner, in particular in order to make a gap width between the machining tool part and the further machining tool part adjustable. The at least two packaging layers are preferably moved through between the processing tool part and the further processing tool part for a connection, while the embossing structure acts on the at least two packaging layers. It is also conceivable that the embossing structure is arranged completely on the processing tool part and the elastically designed deformation element is arranged on the further processing tool part, in particular in the receptacle or on the outer surface. The deformation element can be designed, for example, as an elastomer or as another elastically deformable element that appears sensible to a person skilled in the art. The deformation element preferably deforms elastically under the action of the processing tool part, in particular the embossing structure, on the packaging layers arranged between the processing tool part and the further processing tool part. The deformation element can be designed in one piece with the further machining tool part or can be arranged, in particular fastened, in a detachable manner on the further machining tool part. By means of the configuration according to the invention, a processing tool can advantageously be made available which can enable a secure connection of the at least two packaging layers based on cellulose fiber material, in particular since the effect of the embossing structure on the packaging layers arranged between the processing tool part and the further processing tool part causes fibers of the Packaging layers can be realized. A cost-effective processing tool can advantageously be implemented for connecting the at least two packaging layers based on cellulose fiber material. The method according to the invention and/or the machining tool according to the invention should/should not be limited to the application and embodiment described above. In particular, the method according to the invention and/or the machining tool according to the invention can/can have a number of individual elements, components and units as well as method steps that differs from a number specified here in order to fulfill a function described herein. In addition, in the value ranges specified in this disclosure, values lying within the stated limits should also be considered disclosed and can be used as desired.

drawings

Further advantages result from the following description of the drawing. Exemplary embodiments of the invention are shown in the drawings. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into further meaningful combinations.

Show it:

1 shows a production plant, in particular a food packaging plant or food filling plant, with a processing tool according to the invention for carrying out a method according to the invention in a schematic representation,

2 shows a detailed view of the processing tool according to the invention in a schematic representation,

3 shows a schematic process sequence of the method according to the invention,

Fig. 4 an initial packaging, which consists of at least two packaging layers based on cellulose fiber material, which are inventive method are connected to each other, is produced, in a schematic representation and

5 shows a detailed view of an alternative machining tool according to the invention in a schematic representation.

Description of the exemplary embodiments

FIG. 1 shows a production plant 36 which is designed, for example, as a food packaging plant or as a food bottling plant. The production plant 36 includes a device for producing packaging, in particular primary packaging 46 (cf. FIG. 4), for foodstuffs. The device comprises at least one processing tool 22 (see Figure 2) for carrying out a method 10 (see Figure 3) for joining at least two packaging layers 12, 14 based on cellulose fiber material, in particular packaging paper layers (see Figure 2). However, it is also conceivable that the device or the processing tool 22 is designed as an independent device or as an independent tool that can be operated independently of the production plant 36 .

Figure 2 shows a schematic representation of the processing tool 22, the at least two packaging layers 12, 14 being arranged to be connected to one another in the processing tool 22, in particular between a processing tool part 30 and a further processing tool part 32 of the processing tool 22. The processing tool 22 is provided for a glue-free and/or adhesive-free connection of the at least two packaging layers 12, 14 based on cellulose fiber material. The processing tool 22 is preferably provided to connect the at least two packaging layers 12, 14 based on cellulose fiber material to one another as a result of pressure being exerted on the packaging layers 12, 14 in the region of a connection point 18 of the packaging layers 12, 14. The processing tool 22 preferably has the processing tool part 30 and at least the further processing tool part 32, between which the at least two packaging layers 12, 14 can be arranged for connection to one another. The processing tool 22 is preferably designed as a sealing tool trained. It is also conceivable, however, for the processing tool 22 to have a different configuration that appears sensible to a person skilled in the art, which can be used to connect the at least two packaging layers 12, 14 based on cellulose fiber material. The machining tool part 30 is preferably designed as a stamp. The further machining tool part 32 is preferably designed as a matrix or as a negative mold, into which the machining tool part 30 can be moved at least partially. The processing tool part 30 and the further processing tool part 32 are preferably mounted so as to be movable relative to one another, in particular mounted so as to be movable relative to one another in a translatory manner. It is conceivable that the machining tool part 30 and the further machining tool part 32 can each be driven individually with a drive unit, or that the machining tool part 30 can be driven relative to the further machining tool part 32 by means of a drive unit, while the further machining tool part 32 is fixed in place. It is also conceivable that the processing tool part 30 and the further processing tool part 32 are designed as cylinders or rollers, in particular as sealing cylinders or as sealing rollers, as joining rollers or as joining rollers or the like, which, in particular in addition to a translationally movable Storage, are rotatably mounted.

The processing tool 22 includes an embossing structure 20 which is at least partially arranged on the processing tool part 30, in particular on the sealing tool part or on the joining tool part. The embossed structure 20 can have any configuration that appears sensible to a person skilled in the art, such as a configuration with parallel embossing lines, a configuration with crossed embossed lines, a configuration as a honeycomb embossed structure or the like 20 is at least partially arranged. The extension 38 preferably has a polygonal cross section. However, it is also conceivable for the extension 38 to have a cross-section in the shape of a sector of a circle, in particular a semi-circular cross-section or another cross-section that a person skilled in the art deems appropriate.

The machining tool 22 includes the further machining tool part 32, in particular the further sealing tool part or the further joining tool tool part that cooperates to emboss the at least two packaging layers 12, 14 in the region of the connection point 18 of the at least two packaging layers 12, 14 with the processing tool part 30, in particular with the sealing tool part, with the embossing structure 20 being at least partially on the processing tool part 30 and at least partially is arranged on the further machining tool part 32 . The further processing tool part 32 preferably has a configuration that is complementary to the processing tool part 30 , in particular when the embossing structure 20 is at least partially arranged on the further processing tool part 32 . The further machining tool part 32 preferably comprises at least one receptacle 40, which is designed to complement the extension 38 of the machining tool part 30, in particular when the embossing structure 20 is at least partially arranged on the further machining tool part 32. The receptacle 40 is, for example, channel-shaped. The embossed structure 20 is at least partially arranged on the receptacle 40 . The extension 38 of the processing tool part 30 preferably engages in the receptacle 40 of the further processing tool part 32 while the at least two packaging layers 12, 14 are being connected. The at least two packaging layers 12, 14 are preferably pressed and/or deformed into the receptacle 40 of the further processing tool part 32 in the region of the connection point 18 of the at least two packaging layers 12, 14 for connection by means of the extension 38 of the processing tool part 30. The at least two packaging layers 12, 14 are preferably embossed by the embossing structure 20, which is arranged partially on the extension 38 and partially on the receptacle 40, as a result of being pressed into the receptacle 40 by means of the extension 38. The at least two packaging layers 12, 14 are preferably deformed three-dimensionally, in particular in addition to an embossing, by means of the interaction of the extension 38 and the receptacle 40.

FIG. 3 shows a schematic process sequence of the method 10 for connecting the at least two packaging layers 12, 14 based on cellulose fiber material to one another, in particular without an adhesive or without a glue. The packaging layers 12, 14 are preferably designed as packaging paper layers. However, it is also conceivable that the packaging layers 12, 14 as cardboard packaging layers, as a cardboard packaging, as Non-woven packaging paper layers or other packaging layers based on cellulose fiber material that appear sensible to a person skilled in the art. Preferably, the packaging layers 12, 14 are polymer-free. In particular, the packaging layers 12, 14 are formed without a thermoplastic layer or any other sealing layer or joining layer already known to a person skilled in the art. The packaging layers 12, 14 are connected to one another by means of the method 10, preferably without an adhesive or glue, in particular as a result of an action, in particular exertion of pressure, of the processing tool 22 on the packaging layers 12, 14 in the region of the connection point 18 of the packaging layers 12, 14. The packaging layers 12, 14 are preferably connected to one another by means of the processing tool 22 in such a way that the packaging layers 12, 14 can be used to produce primary packaging 46 (cf. FIG. 4). Preferably, during the joining of the at least two packaging layers 12, 14, in particular by means of the processing tool 22, at least one connecting seam 50 (see Figure 4), in particular at least one top, transverse and/or longitudinal sealing or joining seam, is produced on the primary packaging 46 . However, it is also conceivable that other types of packaging can be produced by connecting the at least two packaging layers 12, 14.

Method 10 for joining the at least two packaging layers 12, 14 based on cellulose fiber material preferably comprises at least one method step 16, in which at least one packaging layer 12, 14 of the at least two packaging layers 12, 14 is connected in the region of the connection point 18 of the at least two packaging layers 12, 14 is embossed by means of the processing tool 22 encompassing the embossing structure 20, in particular the sealing tool. It is conceivable that the at least one packaging layer 12, 14 of the at least two packaging layers 12, 14 is embossed in the region of the connection point 18 during connection or before connection using the processing tool 22. The at least two, in particular both, packaging layers 12, 14 are preferably embossed in the area of the connection point 18 of the at least two packaging layers 12, 14 by means of the processing tool 22 comprising the embossing structure 20. Preferably, the processing tool 22 is used to emboss, in particular an emboss pattern, in the area of the connection point 18 of the at least two packaging layers 12, 14 introduced into the at least two packaging layers 12, 14. The at least two packaging layers 12, 14 are preferably embossed together by means of the processing tool 22 during connection. The embossed structure 20 acts preferably from two sides 24, 26 (see also FIG. 2) on the at least one packaging layer 12, 14 of the at least two packaging layers 12, 14, in particular on both packaging layers 12, 14. Preferably, when the embossing is applied while the at least two packaging layers 12, 14 are being joined, the embossed structure 20 acts directly on an outer surface 52 of the at least one packaging layer 12 and directly on an outer surface 54 of the further packaging layer 14 of the at least two packaging layers 12, 14, wherein the outer surface 52 of the at least one packaging layer 12 and the outer surface 54 of the further packaging layer 14 are oriented away from one another (cf. FIG. 2). Both packaging layers 12, 14 are preferably arranged during an embossing and during a connection, in particular spatially, between the processing tool part 30 and the further processing tool part 32, with the embossing structure 20 being arranged at least partially on the processing tool part 30 and at least partially on the further processing tool part 32.

An embossing time in which the at least one packaging layer 12, 14 of the at least two packaging layers 12, 14 is embossed by means of the action of the processing tool 22 on the at least one packaging layer 12, 14 of the at least two packaging layers 12, 14 is less than 2.5 s The embossing time in which both packaging layers 12, 14 are embossed by means of the action of the processing tool 22 on both packaging layers 12, 14 is preferably less than 2.5 s. In particular, the embossing time is less than 1.5 s, preferably less than 1 s and particularly preferably less than 0.5 s. The embossing time preferably has a value from a value range of 0.2 s to 2 s. The at least two packaging layers 12, 14 are used, in particular in the region of the connection point 18 of the at least two packaging layers 12, 14, to create a connection between the at least two packaging layers 12, 14 by means of the processing tool 22 with a pressure of more than 1.5 N/ mm ² applied, especially during the embossing time. The processing tool 22 is moved while it is acting on the at least two packaging layers 12, 14 applied to a connection of the at least two packaging layers 12, 14 with a force of more than 15 kN, in particular during the embossing time.

The method 10 has at least one, in particular preceding, method step 28, which is carried out in particular before embossing. In the, in particular preceding, method step 28, at least one packaging layer 12, 14 of the at least two packaging layers 12, 14 is moistened in the region of the connection point 18 with a medium 56 (cf. FIG. 2). The medium 56 is preferably in the form of water or water to which at least one additive has been added, in particular sugar, starch, surfactants or the like. The at least one packaging layer 12, 14 of the at least two packaging layers 12, 14, in particular both packaging layers 12, 14, can be moistened by spraying, steaming, rolling, a water bath or by another possibility that a person skilled in the art considers sensible . Medium 56 is preferably applied to the at least one packaging layer 12, 14 of the at least two packaging layers 12, 14 or to both packaging layers 12, 14 or between the two by means of a moistening device 58 (see Figure 2) of production plant 36 in the area of connection point 18 Packaging layers 12, 14 introduced. The moistening device 58 can be formed separately from the processing tool 22 or can be at least partially integrated into the processing tool 22 .

The method 10 has at least one method step 60, which in particular follows the moistening. Method step 60, which follows in particular the moistening, is preferably carried out before embossing. In method step 60, which follows in particular the moistening, the processing tool 22 and/or the at least two packaging layers 12, 14 are heated, in particular by means of a heating device (not shown in detail here) of the production plant 36. The heating device can be installed separately from the processing tool 22 be formed or be at least partially integrated into the machining tool 22. The processing tool 22 and/or the at least two packaging layers 12, 14 have/have a temperature of less than 250° C., in particular less than 200° C., during a connection of the at least two packaging layers 12, 14. After the at least two packaging layers 12, 14 have been connected by means of the processing tool 22, in particular the embossing structure 20, acting on the connection point 18 of the at least two packaging layers 12, 14, further process steps 62, 64 of the method 10 are conceivable, in which the connected packaging layers 12 , 14 can be folded or rotated in one of the further process steps 62, 64, for example, and then folded in order to produce an initial packaging 46. For example, it is also conceivable that in one of the further process steps 62, 64, in particular after the joining and embossing of the packaging layers 12, 14, the primary packaging 46 is filled with products, in particular with food, and then a connection of regions of the primary packaging 46 by means of a further processing tool (not shown in detail here) that works and/or is designed analogously to the processing tool 22 .

Another exemplary embodiment is shown in FIG. The following description of FIG. 5 and FIG. 5 itself are essentially limited to the differences between the exemplary embodiments, whereby with regard to identically designated components, in particular with regard to components with the same reference symbols, in principle also to the drawings and/or the description of the other exemplary embodiment , In particular of Figures 1 to 4, can be referred. To distinguish between the exemplary embodiments, an apostrophe is added to the reference numbers of the exemplary embodiment in FIG.

Figure 5 shows an alternative processing tool 22' for connecting at least two packaging layers based on cellulose fiber material (not shown in detail here) to one another in accordance with the method 10 shown in Figure 3. The processing tool 22' comprises at least one processing tool part 30' and an embossing structure 20', which is at least partially arranged on the machining tool part 30'. The embossing structure 20' is in particular arranged completely on the processing tool part 30'. The processing tool 22' preferably comprises a further processing tool part 32', which is used to emboss the at least two packaging layers in the area of a connection point (not shown in detail here) of the at least two packaging layers with the processing tool part 30', in particular the sealing tool part. works together. A deformation element 34', which is designed to be elastic, is arranged on the further machining tool part 32'. The deformation element 34′ can, for example, be designed as an elastomer or as another elastically deformable element that appears sensible to a person skilled in the art. The deformation element 34′ preferably deforms elastically under the action of the processing tool part 30′, in particular the embossing structure 20′, on the packaging layers arranged between the processing tool part 30′ and the further processing tool part 32′. The deformation element 34′ can be formed in one piece with the further machining tool part 32′ or can be detachable on the further machining tool part

32' can be arranged, in particular fastened. The deformation element 34' is preferably arranged on a receptacle 40' of the further machining tool part 32'. The embossed structure 20' preferably acts on the at least one packaging layer of the at least two packaging layers, in particular on both packaging layers, at least from one side, in particular during an embossing of the at least one packaging layer and/or during a connection of the at least two packaging layers.

Claims

- 23 - claims

1. A method for joining at least two packaging layers (12, 14) based on cellulose fiber material, in particular layers of packaging paper, to one another, in particular free of an adhesive or glue, wherein in at least one method step (16) at least one packaging layer (12, 14 ) of the at least two packaging layers (12, 14) is embossed in the area of a connection point (18) of the at least two packaging layers (12, 14) by means of a processing tool, in particular a sealing tool, comprising an embossing structure (20), characterized in that in at least one method step (28) before embossing, at least one packaging layer (12, 14) of the at least two packaging layers (12, 14) is moistened in the area of the connection point (18), in particular with water or with at least one additive, in particular sugar, starch, surfactants or the like. Like., added water.

2. The method according to claim 1, characterized in that the embossed structure (20) is applied at least from one side (24) to the at least one packaging layer (12, 14) of the at least two packaging layers (12, 14), in particular to both packaging layers (12, 14), acts.

3. The method according to claim 1 or 2, characterized in that the embossed structure (20) from two sides (24, 26) on the at least one packaging layer (12, 14) of the at least two packaging layers (12, 14), in particular on both packaging layers (12, 14).

4. The method according to any one of the preceding claims, characterized in that an embossing time in which the at least one packaging layer (12, 14) of the at least two packaging layers (12, 14) is pressed by means of an action of the processing tool on the at least one packaging layer (12, 14 ) which is embossed on at least two packaging layers (12, 14) is less than 2.5 s.

5. The method according to any one of the preceding claims, characterized in that the at least two packaging layers (12, 14), in particular in the region of the connection point (18) of the at least two packaging layers (12, 14), to create a connection between the at least two packaging layers (12, 14) are subjected to a pressure of more than 1.5 N/mm ² by means of the processing tool.

6. The method according to any one of the preceding claims, characterized in that the processing tool is subjected to a force of more than 15 kN while it is acting on the at least two packaging layers (12, 14) to connect the at least two packaging layers (12, 14). .

7. The method according to any one of the preceding claims, characterized in that the processing tool and/or the at least two packaging layers (12, 14) have a temperature of less than 250 °C, in particular of less than 200°C.

Processing tool, in particular sealing tool, for joining at least two packaging layers (12, 14) based on cellulose fiber material, in particular packaging paper layers, to one another according to a method according to one of the preceding claims, with at least one processing tool part (30), in particular sealing tool part, and with an embossing structure ( 20), which is at least partially arranged on the processing tool part (30), in particular the sealing tool part, characterized by at least one further processing tool part (32), in particular another sealing tool part, which is used to emboss the at least two packaging layers (12, 14) in the area of a connection point (18) of the at least two packaging layers (12, 14) interacts with the processing tool part (30), in particular the sealing tool part, with the further processing tool part (32), in particular when the embossing structure (20) is at least partially arranged on the further processing processing tool part (32), has a configuration complementary to the processing tool part (30), the at least two packaging layers (12, 14) being connected by means of an extension (38) of the processing tool part (30) into a receptacle (40) of the further processing tool part (32 ) can be pressed in and/or can be deformed into it. Processing tool according to Claim 8, characterized by at least the additional processing tool part (32), in particular the additional sealing tool part, which is used to emboss the at least two packaging layers (12, 14) in the region of a connection point (18) of the at least two packaging layers (12, 14) with the Processing tool part (30), in particular sealing tool part, interacts, with the embossing structure (20) being arranged at least partially on the processing tool part (30), in particular sealing tool part, and at least partially on the further processing tool part (32), in particular further sealing tool part, or with the embossing structure ( 20'), in particular completely, on the processing tool part (30'), in particular sealing tool part, and the further processing tool part (32'), in particular further sealing tool part, has a deformation element (34') which is designed to be elastic.