Packaging and manufacturing process

Abstract

The present invention relates to a packaging component comprising a structural layer (2) based on cellulose and / or recycled materials, having an inner surface, a cross-section and an outer surface, and a functional layer (4) at least partially covering the inner surface of the structural layer (2), the functional layer (4) comprising an additional portion (16) extending beyond the periphery of the structural layer (2).

Description

Corresponding Application

[0001] This PCT application claims priority to an earlier European application No. 21170468.9, filed on April 26, 2021 in the name of AISAPACK HOLDING SA, the entire contents of which are incorporated by reference into this PCT application. [Technical field]

[0002] The present invention relates to the field of packaging based on cellulose or recyclable plastics. More particularly, it relates to a packaging comprising a tubular body obtained by welding or gluing end to end of a sheet. The invention applies to the field of packaging, in particular to the field of recyclable flexible tubes designed to contain cream or paste products, or it applies to the field of flexible pouches for containing food products, or to cans as an alternative to aluminium for containing liquids, or to the field of containers for cosmetics. PRIOR ART

[0003] EP 1260447 by Otani describes a paper pulp packaging produced by moulding. Otani's patent has many advantages since it makes it possible to obtain a packaging with a high level of cellulose. The process by Otani makes it possible in particular to form a package with threads that have considerable strength and durability. However, the process for obtaining this packaging has long cycle times, which does not allow production at a fast pace and at competitive costs. Furthermore, the process does not make it possible to locally adjust the thickness of the packaging, which is problematic if one wishes to produce flexible packaging, such as tubes.

[0004] Plastic, or metal-plastic, or paper-plastic tubes, manufactured by welding a tubular body to a tube head, such as a flexible tube, are described, for example, in the publications FR 2505250, GB 1118632, US 2119926 and US 4132331. The problem of leakage at the intersection of the weld is not addressed in these documents, since the tubes described in these publications mainly have plastic or synthetic materials that melt at least partially or completely during the welding operation, preventing the formation of cavities. However, the prior art does not teach how to obtain a sealed package when using mainly cellulose-based materials or other comparable (natural or synthetic) materials that do not melt under the influence of temperature. Summary and principle of the invention

[0005] It is an object of the present invention to improve known processes, machines and products.

[0006] Another object of the present invention is to improve cellulose-based packaging, as well as processes and machines for their production.

[0007] Another object of the present invention is to improve packaging based on recycled materials that cannot come into contact with the packaged product, as well as processes and machines for their production.

[0008] Another object of the present invention is to eliminate the sealing problems encountered with prior art tubes and packages whose components are made from cellulose-based materials.

[0009] The present invention relates to a packaging based on cellulose and / or recycled materials, comprising a tubular body assembled in contact with at least one element forming the end of a tube or a container or a bottle, said element being, for example, a neck portion and / or a shoulder portion having a base portion.

[0010] According to some embodiments, the invention makes it possible to produce cellulose-based packaging that contains a sufficient level of cellulose to allow the packaging to be recycled in channels for paper and / or other recycled materials, thus allowing the packaging to be recycled through appropriate channels. Tubular packaging produced by welding cellulose-based sheets can contain high levels of cellulose, typically higher than 85%. However, the production of components (neck, base) that contain high levels of cellulose is still a topical topic.

[0011] Hereinafter, in the description of the present invention, the term "recycled material" is used to refer to a material that is not suitable for contact with packaged products. For example, recycled materials can be recycled resins, or recycled plastic materials such as HDPE, or other equivalents. Recycled materials can or do not have to be a single material, i.e., recycled materials can include multiple materials (traces, contamination, etc.). Other materials that are not necessarily recycled but are not suitable for contact with packaged products can also be envisaged within the context of the present invention.

[0012] According to another embodiment, the invention makes it possible to produce packaging based on recycled material at a level higher than 60%, preferably higher than 85%. Packaging tubes produced by welding sheets based on recycled material can typically contain a recycling level higher than 85%. However, the production of components (neck, base) containing high levels of recycled material (not suitable for contact with the packaged product) is still a topical topic.

[0013] The present invention relates to a component based on cellulose or recycled materials (such as for example a tube head or base) comprising a (preferably) thin functional layer covering at least the so-called inner surface of said component, its cross section at the end of said component and its so-called assembly area. The inner surface of the component is defined as the surface of the component that is inside the packaging and in contact with the packaged product. The cross section is the part of the component that forms its end and that is located inside the packaging after assembly. The assembly area is defined by the part of the outer surface of the component that is located at the periphery and is used to assemble the component and the tubular body of the packaging. According to some embodiments of the invention, the end of the inner surface of the tubular body is assembled in contact with the end of the outer surface of the component. Preferably, the assembly is performed by welding.

[0014] According to the present invention, the functional layer may be a single layer or may itself comprise multiple layers to ensure that all of the properties (e.g., barrier, weldability, organoleptic properties) are provided.

[0015] According to the invention, the functional layer has at least the property of impermeability to protect the cellulose layer (known as the "structural layer") from the humidity contained in the packaging and / or the packaged product and to ensure the preservation of the packaged product. The functional layer can also have the property of impermeability to gases such as oxygen to prevent oxidation of the packaged product.

[0016] According to the invention, the functional layer has at least the property of impermeability to isolate the layer made of recycled materials (known as the "structural layer") of the packaged product, to prevent the transfer of molecules from the layer made of recycled materials to the packaged product, and to ensure the preservation of the packaged product. The functional layer preferably has the property of impermeability to gases such as oxygen, to prevent oxidation of the packaged product and the transfer of recycled residues.

[0017] The functional layer has properties that allow the assembly of the components in contact with the tubular body. Preferably, the functional layer has properties of weldability with the inner layer of the tubular body. Alternatively, the functional layer is assembled by gluing or another similar and / or equivalent method.

[0018] According to another embodiment of the invention, the functional layer covers all of the surfaces of the component, i.e. the inner surface of the component, the outer surface of the component as well as the cross section of the component. This variant makes it possible to obtain a package that is less susceptible to humidity, i.e. humidity originating both from the interior of the package (liquid packaging product) and from the environment in which the package is used (e.g. bathroom, shower).

[0019] Processes for the manufacture of these components and packages comprising such components according to the invention are described in this application.

[0020] The process for the manufacture of the component includes at least the following steps:

[0021] 1. The assembly of a functional layer on the inner surface of a component based on cellulose or recycled materials; 2. Covering the cross section with a functional layer; 3. Assembly of a functional layer on the outer surface of the component based on cellulose or recycled materials at least in the so-called assembly area.

[0022] According to some embodiments, the present invention relates to a packaging component comprising a structural layer based on cellulose or recycled materials having an inner surface, a cross-section and an outer surface, and a functional layer at least partially covering the inner surface of the structural layer, the functional layer comprising an additional portion extending beyond the periphery of the structural layer.

[0023] According to some embodiments, the packaging component comprises a functional layer at least partially covering an outer surface of the structural layer.

[0024] According to some embodiments, the functional portion is formed by a portion of the functional layer that covers the inner and outer surfaces and extends beyond the periphery of the structural layer.

[0025] According to some embodiments, the additional portion may be at least partially cut off.

[0026] According to some embodiments, the additional portion may be folded back to cover a cross section of the structural layer.

[0027] According to some embodiments, the functional layer has adhesion properties.

[0028] According to some embodiments, the functional layer is a single layer or a multilayer.

[0029] According to some embodiments, the functional layer may be, for example: -PE / EVOH / PE -PVOH -PVOH / PE -PP / Metalized BOPP / PP -PP / SiOX BOPP / PP or are based on biodegradable and / or bio-derived resins or combinations of materials.

[0030] According to some embodiments, the structural layer is single layer or multi-layer.

[0031] According to some embodiments, the packaging part is a tube head or base.

[0032] According to some embodiments, the packaging part is a tube head with a neck.

[0033] According to some embodiments, the neck is clipped onto the tube head.

[0034] According to some embodiments, the packaging part comprises a stopper.

[0035] According to some embodiments, the packaging part comprises an element for connection between the neck and the stopper.

[0036] According to some embodiments, the functional layer at least partially or completely occludes the opening in the neck portion.

[0037] According to some embodiments, the present invention relates to a packaging comprising at least a part as described in the present application in the form of a tube head and / or base and a second part in the form of a tubular body having a functional layer, wherein the parts are fixed to each other within an assembly area containing the functional layer of each part in order to ensure continuity of the functional layer after assembly of the parts.

[0038] According to some embodiments of the package, the assembly of the parts is performed by welding or gluing.

[0039] According to some embodiments, the package is, for example, a tube or a container.

[0040] In some embodiments according to the present invention of a process for manufacturing a first part (such as a shoulder or base) of a packaging product, the packaging product comprising at least the first part and a second part (such as a tubular body), the first part and the second part being designed to be assembled to each other by fixing in an assembly area, the first part comprising a structural layer based on cellulose or recycled materials having an inner surface, a cross section and an outer surface, in the process, a functional layer is attached to the structural layer by forming an additional portion covering at least the inner surface of the structural layer and extending beyond the periphery of the structural layer, and the additional portion is folded back so as to cover at least the cross section of the structural layer.

[0041] According to some embodiments of the process, an auxiliary folding portion is provided in the additional portion for folding and fixing the additional portion onto an outer surface of the structural layer of the first component, said additional portion forming an assembly area for the components of the packaging.

[0042] According to some embodiments of the process, an outer surface of the structural layer of the first component is also covered with the functional layer to enclose the first component within the functional layer.

[0043] According to some embodiments of the process, the additional portion is formed by a functional layer covering the inner surface and / or a functional layer covering the outer surface of the first component.

[0044] According to some embodiments of the process, the additional portion is at least partially cut.

[0045] According to some embodiments of the process, the package is formed by assembling at least a first part and a second part and attaching them to one another in an assembly area.

[0046] According to some embodiments of the process, the first part is the shoulder and / or the base, and the second part is the tubular body. According to one embodiment of the process, to form a container, the packaging comprises three parts, namely the shoulder as the first part, the tubular body as the second part, and the base as the third part. These parts are assembled according to the steps of the process described in the present application, where the first part and the third part are assembled with the second part, for example as shown in the figure. [Brief description of the drawings]

[0047] [Figure 1] FIG. 1 illustrates cellulose or recycled material based packaging components and packages consistent with the present invention. [Diagram 2] FIG. 1 illustrates cellulose or recycled material based packaging components and packages consistent with the present invention. [Diagram 3] FIG. 1 illustrates cellulose or recycled material based packaging components and packages consistent with the present invention. [Figure 4]FIG. 1 illustrates cellulose or recycled material based packaging components and packages consistent with the present invention. [Diagram 5] FIG. 1 illustrates cellulose or recycled material based packaging components and packages consistent with the present invention. [Figure 6] FIG. 1 illustrates cellulose or recycled material based packaging components and packages consistent with the present invention. [Figure 7] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 8] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 9] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 10] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 11] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 12a] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 12b] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 13] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 14] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 15] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 16] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 17] FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 18]FIG. 1 illustrates a process for the manufacture of packaging components and packages according to the present invention. [Figure 19] FIG. 1 shows an example of a package that can be produced by applying the principles of the present invention. [Figure 20] FIG. 1 shows an example of a package that can be produced by applying the principles of the present invention. Reference number

[0048] 1 Tube head or shoulder part (component) 2. Construction layout based on cellulose or recycled materials 3. Tubular bodies based on cellulose or recycled materials 4. Functional Layer 5 End 6 Neck 7 Openings 8 hot air 9 Base (component) 10 Assembly Area 11a Clip-on part 11b Connection elements 11c Stopper 12 End 13 End weld 14 Longitudinal weld 15 Stopper 16 Additional parts

[0049] In the description of the present invention, the term "structural layer" 2 is used to refer to the part of the component (such as the tube head / shoulder part 1 or the base 9) based on cellulose or recycled materials, which represents the majority of its mass and on which its mechanical strength mainly depends. According to the invention, this structural part itself can be composed of several layers (for example at least two layers). Advantageously, the structural layer 2 is composed of several layers based on cellulose fibers, each layer being characterizable by the size, orientation and density of the fibers.

[0050] In the description of the present invention, the term "functional layer" 4 is used to refer to a layer of narrow thickness that provides the functions of the package, such as a barrier against moisture, odors or oxygen, compatibility for contact with the packaged product, and weldability in the area of ​​assembly with the tubular body. According to the present invention, this layer itself may be composed of several layers to provide all of the required functions.

[0051] In the present description, an inner surface refers to a surface of a component that is located inside the package and potentially in contact with the product contained in the package, whereas an outer surface refers to a surface that is located on the outside of the package.

[0052] In the description of the present invention, the term "end" is used to refer to the part of the component that is peripherally located in cross section. Within the context of the present invention, it is important to cover the end of the component with the functional layer 4, since said end is inside the packaging after assembly on the tubular body 3.

[0053] Figure 1 shows a shoulder 1 of a tube or container containing a level of cellulose or recycled material higher than 70%, preferably higher than 85%. According to the invention, the shoulder 1 shown in Figure 1 comprises a structural layer 2 based on cellulose or recycled material and a functional layer 4 covering at least the inner surface of the shoulder 1, the end 5 of the shoulder 1 and the assembly area 10 of the shoulder 1.

[0054] Figure 1 shows a shoulder part 1 with a neck part 6 which allows to connect an opening and closing means such as a stopper by screwing, clipping or welding. An opening 7 of the neck part is closed by a functional layer 4 which can be perforated during first use to allow extraction of the packaged product. Solutions for perforation by a stopper are already known and disclosed in the prior art. According to a variant not shown, the functional layer 4 does not close the opening 7.

[0055] The shoulder 1 may also be associated with complex elements for the extraction of the product, such as a pump making it possible to measure the product extracted from the package.

[0056] The functional layer 4 makes it possible to provide the necessary properties at the shoulder 1 for the preservation of the packaged product and at the same time to protect the cellulose or recycled material based structural layer 2 from deterioration caused by the packaged product. For example, when the packaged product is aqueous, the functional layer 4 makes it possible to protect the structural layer 2 from the humidity contained in the package and / or the packaged product. The protection of the cross section of the cellulose based structural layer 2 at the edge 5 is a key point of the invention.

[0057] FIG. 2 shows the assembly of the shoulder 1 against a tubular body of a packaging body, said packaging body being for example a tube or a container.

[0058] The structure and manufacture of the tubular body 3 based on cellulose or recycled materials is not described in the present invention since it has already been described in the prior art, in particular in the publications EP 2007567, EP 284389 and EP 2630052. The tubular body 3 based on cellulose or recycled materials advantageously comprises at least one structural layer based on cellulose or recycled materials and at least a functional layer located on the inner surface of the tubular body, the barrier properties of which depend on the packaged product (e.g. barrier against moisture and / or oxygen and / or odors). The functional layer inside the package is in contact with the packaged product. Said structural and functional layers generally comprise several layers. The tubular body 3 based on cellulose is advantageously manufactured from a multi-layer sheet, the ends of which are assembled end-to-end, preferably with the addition of reinforcing strips at the assembly position. Alternatively, the tubular body is manufactured by covering the edges of the sheets based on cellulose or recycled materials.

[0059] The assembly between the end of the shoulder 1 and the end of the tubular body 3 is carried out in an assembly area 10. In this area, the inner surface of the tubular body 3 is superimposed on the outer surface of the shoulder 1, so that the inner functional layer of the tubular body 3 is in direct contact with the functional layer 1 of the shoulder 1. The invention thus allows a continuity of the functional layer between the shoulder 1 and the tubular body 3 in the assembly area 10, thus ensuring a continuity of the barrier properties of the packaging. The assembly between the shoulder 1 and the tubular body 3 is preferably carried out by welding. An alternative method consists in carrying out the assembly by gluing. It will be appreciated that other equivalent methods are possible and can be envisaged.

[0060] 3 shows a component according to the invention in the form of a cellulose-based packaging base 9. The base 9 comprises a level of cellulose or recycled material higher than 70%, preferably higher than 85%. The base 9 comprises at least one structural layer 2 based on cellulose or recycled material and a functional layer 4 covering the inner surface, the edges 5 and the assembly area 10 of the base.

[0061] The functional layer 4 makes it possible to provide the necessary properties in the base for the preservation of the packaged product, and at the same time it makes it possible to protect the cellulose-based structural layer 2 from deterioration caused by the packaged product. For example, when the packaged product is aqueous, the functional layer 4 makes it possible to protect the structural layer 2 from the humidity contained in the package and / or in the packaged product. The protection of the cross section of the cellulose-based layer 2 at the edge 5 is a key point of the present invention.

[0062] FIG. 4 shows the assembly of a base 9 on a tubular body 3 of a package, said package being for example a container or a bottle.

[0063] FIG. 4 shows that the inner surface of the base 9 (the upper surface in FIG. 3) is inside the packaging after assembly with the tubular body 3 .

[0064] The assembly between the end of the base 9 and the end of the tubular body 3 is carried out in an assembly area 10. In this area, the inner surface of the tubular body is superimposed on the outer surface of the base, such that the inner functional layer of the tubular body 3 is in direct contact with the functional layer 4 of the base. The invention thus allows a continuity of the functional layer between the base 9 and the tubular body 3 in the assembly area 10, thus ensuring a continuity of the barrier properties of the packaging. The assembly between the base 9 and the tubular body 3 is preferably carried out by welding. An alternative method consists in carrying out the assembly by gluing. It will be appreciated that other equivalent methods are possible and can be envisaged.

[0065] Figures 5 and 6 show a second embodiment of the invention, according to which the functional layer 4 seals the structural layer 2 based on cellulose or recycled materials in its entirety, i.e. on its inner surface, on its outer surface as well as on the cross sections 5, 10. This embodiment of the invention makes it possible to obtain a package that is less susceptible to humidity, i.e. humidity coming from both the interior of the package (liquid packaging product) and from the environment in which the package is used (bathroom, shower).

[0066] Figure 5 shows a packaging shoulder 1 corresponding to a second embodiment of the invention. The shoulder 1 comprises a structural layer 2 based on cellulose or recycled materials, completely sealed under a functional layer 4. The complete sealing of the cellulose-based structural layer makes it possible to protect it from humidity coming from inside or outside the packaging. The covering of the outer surface of the cellulose-based structural layer 2 by the functional layer 4 makes it possible to prevent the migration of products in liquid or gaseous state to the structural layer, which would have the effect of degrading its properties.

[0067] 6 shows a packaging base 9 according to a second embodiment of the invention. A structural layer 2 based on cellulose or recycled materials is completely sealed to a thin functional layer 4.

[0068] The functional layer 4 may be a single layer or a multilayer. An example of the structure of the functional layer 4 is as follows:

[0069] -PE / EVOH / PE -PVOH -PVOH / PE -PP / Metalized BOPP / PP -PP / SiOX BOPP / PP Layer 4 may be based on a biodegradable and / or bio-based resin, or a combination of materials.

[0070] Alternatively, the functional layer 4 can be based on natural or synthetic products that are applied by spraying (spray coating) or immersion (dip coating) directly onto the cellulose-based structural layer 2 .

[0071] 7 to 9 show a first example of a manufacturing process according to the invention, where the layer 4 is in the form of a prefabricated film.

[0072] The first step of the process shown in Figure 7 consists of fixing, by welding or gluing, a functional layer 4 to the inner surface of the structural layer 2. As shown in Figure 7, the functional layer 4 has an additional portion 16 which extends beyond the periphery of the structural layer 2.

[0073] 8 consists of folding an additional portion 16 of the functional layer 4 to cover the cross section of the cellulose or recycled material based structural layer 2. Optionally, the functional layer 4 is fixed to the cross section of the structural layer 2 by welding or gluing.

[0074] Finally, the third step of the process, shown in figure 9, consists in forming new folds in the additional part 16 in order to fold it against the outer face of the structural layer 2 based on cellulose or recycled materials and to fix it on the structural layer 2 by welding or gluing. The additional part 16 of the functional layer forms the area of ​​assembly 10 on the periphery of the shoulder 1.

[0075] The functional layer 4 is preferably fixed by welding onto the structural layer 2 based on cellulose or recycled materials. Furthermore, for example, hot air welding of the additional part 16 can be envisaged. Figure 8 shows the blowing of a stream of hot air 8 at the welded joint between the structural layer 2 and the additional part 16. Methods of ultrasonic or heating pad welding can also be used.

[0076] According to another embodiment of the invention, the functional layer 4 is fixed only locally on the structural part 2 .

[0077] Figures 10 to 12b show a second embodiment of a process for the manufacture of a component (such as a tube head 1 or a base 9) having a structural layer 2 completely enclosed in a functional layer 4. In this example, the functional layer 2 is in the form of a prefabricated film.

[0078] The first step of this process, shown in figure 10, consists in fixing a functional layer 4 onto the inner surface of a structural layer 2 based on cellulose or recycled materials. As shown in figure 10, the functional layer 4 has an additional portion 16 which extends beyond the periphery of the structural layer 2.

[0079] The second step of the process shown in Figure 11 consists of fixing another functional layer 4 onto the outer surface of the structural layer 2 to seal the structural layer 2, and simultaneously (or subsequently) fixing the inner and outer functional layers together at the additional portion 16.

[0080] The third step of the process consists of cutting off the auxiliary part 16 that is unnecessary and / or that is to be folded over, and fixing the auxiliary part 16 (or part of it after cutting) on ​​the outer wall (Fig. 12a) or inner wall (Fig. 12b) of the component (1 or 9) to obtain the component shown in Figs. 12a and 12b.

[0081] According to another embodiment not shown, a first process is carried out to obtain the component shown in FIG. 9, then a functional layer 4 is added to the top surface of the component 1, which is covered in the assembly area 10 to totally seal the structural layer 2 based on cellulose or recycled materials.

[0082] According to another embodiment of the process according to the invention, the functional layer 4 can be extruded directly onto the structural layer 2 based on cellulose or recycled materials.

[0083] According to another embodiment of the process according to the invention, the functional layer 4 is deposited by spraying (spray coating) or by immersion (dip coating).

[0084] 13 shows an embodiment in which the opening 7 in the neck 6 is closed by a functional layer 4 applied to the outer surface of a component (such as the shoulder 1). The functional layer 4 may be pierced during first use to allow extraction of the packaged product.

[0085] Figures 14 to 17 show examples of processes for the assembly of cellulose or recycled material based components (such as shoulder 1 and / or tubular body 3) on tubular body 3. A preferred process is shown in Figures 13 and 14.

[0086] 14 shows the relative positioning of the tubular body 3 and the component 1 (e.g. shoulder) before assembly. In this step, the joints of the tubular body 3 and / or the component 1 to be assembled can be subjected to a heating or gluing operation according to the selected assembly mode. If the two parts 1 and 3 are assembled by welding, preferably heating by hot air is used.

[0087] FIG. 15 shows the second step of the process in which the inner surface of the tubular body is pressed against the outer surface of the component 1 in the assembly area 10 to perform assembly by gluing or welding.

[0088] Figures 16 and 17 show another process for the assembly of the tubular body 3 and the component 1 (e.g. the shoulder part). According to this alternative, the auxiliary part 16 of the functional layer 2 is folded and fixed on the outer surface of the component 1 at the moment of assembly.

[0089] Figure 16 shows the first step of the process, with the additional part 16 folded by the tubular body 3 arranged around the component 1. Heating by the flow of hot air 8 makes it possible to heat the welded joint of the component, the welded joint of the tubular body 3 and the auxiliary part 16 of the functional layer 4 together.

[0090] 17 shows the second step of the assembly process, which consists of pressing and cooling the assembly area 10. As shown herein, assembly can be performed by welding, gluing, or another method.

[0091] It will be appreciated that the assembly process described above applies in a corresponding manner to other components, such as the base 9 depicted in Figures 3, 4 and 6.

[0092] FIG. 18 shows another embodiment of the invention, according to which the neck 6 is assembled by being clipped onto the shoulder or head 1 of the cellulose-based tube. The clipping or snapping operation ensures a tight connection and makes it possible to protect the end 12 of the shoulder 1. During the clipping operation, the end 12 of the shoulder 1 is gripped between the neck 6 and the clipping part 11a. In the example shown in FIG. 3, the clipping part 11a is connected to the stopper 11c by a connecting element 11b. The connecting element 11b makes it possible to prevent the stopper 11c from becoming detached from the packaging, which facilitates the recycling operation and makes it possible to comply with statutory requirements.

[0093] The connecting element 11b can be, for example, a wire element or a hinge or another equivalent structure.

[0094] The clipping element 11a has a suitable geometry to ensure a tight seal of the package after clipping has taken place.

[0095] The advantage of clipping is the speed of assembly on the production line and, optionally, the possibility of separating the clipped part 11a from the rest of the package during recycling. The principle of clipping the neck 6 is not limited to the embodiment shown in Fig. 18 but can be applied to all packages described in this application or to other packages with different forms, materials and structures.

[0096] In an embodiment of the packaging according to the invention, The stopper may be a cap.

[0097] The stopper can be clipped on.

[0098] The stopper can be screwed on.

[0099] The stopper may be pressed onto the neck.

[0100] The stopper may include a hinge.

[0101] The stopper is preferably fixed onto the wrapper.

[0102] Figures 19 and 20 show non-limiting examples of packages made according to the principles of the present invention. The packages can be tubes as shown in Figure 19, or containers or bottles as shown in Figure 20, with stoppers 15 that can be as shown in Figure 18 (reference numerals 11a-11c).

[0103] The present invention may be applied to the packaging shown in this application (tubes, containers) or other types of packaging not shown. The embodiments in this application are described as illustrative examples and they should not be considered limiting. Other embodiments may, for example, use means equivalent to those described. The embodiments may also be combined with each other depending on the circumstances, or means used in one way may be used in another way.

Claims

1. A packaging part (1, 9) comprising a structural layer (2) based on cellulose or recycled materials, having an inner surface, a cross section and an outer surface, and a functional layer (4) at least partially covering the inner surface of the structural layer (2), the functional layer (4) comprising an additional portion (16) extending beyond the periphery of the structural layer (2).

2. 2. The packaging part (1, 9) according to claim 1, comprising a functional layer (4) at least partially covering the outer surface of the structural layer (2).

3. 3. Packaging part (1, 9) according to claim 2, wherein the additional portion (16) is formed by a portion of the functional layer (4) covering the inner and outer surfaces and extending beyond the periphery of the structural layer (2).

4. 2. The packaging part (1, 9) according to claim 1, wherein the additional portion (16) is at least partially cut off.

5. 2. The packaging part (1, 9) according to claim 1, wherein the additional portion (16) is folded back to cover the cross section of the structural layer (2).

6. 2. The packaging part (1, 9) according to claim 1, wherein the functional layer (4) has welding properties.

7. 2. The packaging part (1, 9) according to claim 1, wherein the functional layer (4) is single-layered or multi-layered.

8. The functional layer (4), PE / EVOH / PE PVOH PVOH / PE PP / Metalized BOPP / PP PP / SiOX BOPP / PP 2. The packaging part (1, 9) according to claim 1, which is made of or is based on a biodegradable and / or bio-based resin or a combination of materials.

9. 2. The packaging part (1, 9) according to claim 1, wherein the structural layer (2) is mono- or multi-layered.

10. 2. Packaging part (1, 9) according to claim 1, wherein the part is a tube head (1) or a base (9).

11. 2. Packaging part (1, 9) according to claim 1, wherein the part is a tube head (1) with a neck portion (6).

12. 12. The packaging part (1,9) according to claim 11, wherein the neck (6) is clipped onto the tube head (1).

13. Packaging part (1, 9) according to claim 11, characterized in that the part comprises a stopper (11c, 15).

14. 14. The packaging part (1, 9) according to claim 13, comprising a connecting element (11b) between the neck portion (6) and the stopper (11c).

15. 2. The packaging part (1, 9) according to claim 1, wherein the functional layer (4) closes the opening of the neck portion (6).

16. A packaging comprising at least one part according to claim 1 in the form of a tube head (1) and / or a base (9) and a second part in the form of a tubular body (3) having a functional layer (4), wherein the parts are fixed to each other within an assembly area (10) including the functional layer (4) of each part to ensure continuity of the functional layer (4) after assembly of the parts.

17. 17. The package of claim 16, wherein the assembly is performed by welding or gluing.

18. 17. The package of claim 16, wherein the package is a tube or a container.

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