Cellulosic tube head, tube and method of manufacture

Abstract

To provide a packaging which can be recycled in the paper industry.SOLUTION: The present invention relates to a novel packaging component, for example a tube head or a cap, comprising a structural component and at least one functional component. The structural part has a high cellulose content and the functional part has a low cellulose content. The invention also relates to a packaging comprising at least one such packaging component, and to a method for manufacturing a component for packaging, and to a packaging.SELECTED DRAWING: Figure 1

Description

Related Applications

[0001] This application claims priority to an earlier European patent application No. 20195175.3 filed on September 8, 2020 in the name of AISAPACK HOLDING SA, which is incorporated herein by reference in its entirety. [Technical Field]

[0002] The present invention relates to packaging components and cellulosic packaging. More specifically, the present invention relates to a cellulosic tube head, a cellulosic opening / closing system, and the cellulosic packaging obtained therefrom. The present invention applies to the field of packaging, in particular, but not exclusively, to flexible tubes intended to contain creams or pastes, such as toothpaste. The present invention also relates to a method for producing this packaging. [Background technology]

[0003] Many flexible packaging products include several separate components. In the case of tubes, for example, there is a first component, which forms a flexible cylinder and is preferably manufactured by welding single- or multi-layer sheets. This component of the packaging can be easily manufactured from sheets containing a high cellulose content, such as paper sheets. The tube also includes a second component, called the tube head, which is a three-dimensional component manufactured by molding and includes functional components for opening and closing the packaging. This component of the packaging is difficult to manufacture from cellulosic materials due to both the packaging's performance (impermeability to moisture) and the process (the difficulty of manufacturing three-dimensional components at high speed). Finally, the packaging includes a third component, the opening and closing system, which generally takes the form of a screw-on or snap-on cap. This third component is also difficult to manufacture from cellulosic materials due to its three-dimensional shape.

[0004] One object and one aim of the present invention is in particular to make it possible to ameliorate these difficulties and to propose packaging with a high cellulose content that allows recycling in the paper industry. Summary of the Invention

[0005] The present invention relates to packaging components comprising a cellulosic structural component and one or more resin-based overmolded functional components, and in particular to tube heads and opening and closure systems such as caps.

[0006] A first aspect of the present invention relates to a cellulose-based tube head. According to the first embodiment of the present invention, the tube head comprises a structural component having a high cellulose content and at least one functional component having a lower cellulose content. The tube head comprises a first functional component around its periphery, which allows the tube head and skirt to be assembled. The tube head also comprises a second functional component in the center, which allows a cap to be attached to open and close the packaging. The second functional component, in particular, allows the packaging to be sealed when the cap is closed. The functional component also protects the end of the cellulose-based structural component from moisture.

[0007] The present invention makes it possible to minimize the amount of non-cellulose-based functional material. According to the present invention, the cellulose content in the tube head is greater than 50%, suitably greater than 70%, preferably greater than 85%.

[0008] In an embodiment, the present invention relates to a packaging part such as a tube, for example a tube head or cap or bottom or capsule body, said part comprising a structural part and at least one functional part, wherein the structural part has a high cellulose content and the functional part has a lower cellulose content.

[0009] In an embodiment, the cellulose content of the structural component is at least above 50%, suitably above 70%, preferably above 85%.

[0010] In embodiments, the structural component has a single or multi-layer cellulosic structure.

[0011] In embodiments, the part may be, for example, a tube head or a capsule body.

[0012] In an embodiment, the multi-layer structure is, from the outer surface to the inner surface, as follows: Paper / PE or Paper / PP or Paper / Coating PE / Paper / PE or PP / Paper / PP or Coated / Paper / Coated Coating / Paper / PVOH / PE PE / Paper / PE-EVOH-PE PE / Paper / Barrier PET / PE OPP / Paper / Barrier OPP / PP Coating / PVOH / Paper / PE PE-EVOH-PE / Paper / PE Barrier OPP / Paper / PP

[0013] In an embodiment, the outer layer is a coating type and / or lacquer / varnish layer.

[0014] In an embodiment, the structural component is made from a multi-layer sheet, preferably containing a cellulose content of greater than 50%.

[0015] In an embodiment, the tube head may comprise, as at least functional parts: welding area, Sealing areas at the ends of structural components; assembly means for assembling the tube head with the cap; a sealing means between the tube head and the cap; Orifice

[0016] In embodiments, the functional component is made from a resin, such as, for example: PE or PP or PVOH PLA or other bio-based resins biodegradable resin Low or high temperature adhesives or multi-layer

[0017] In an embodiment, the packaging part is a cap.

[0018] In an embodiment, the multi-layer structure of the structural component comprises, for example, from the outer surface to the inner surface: paper Paper / PE Paper / PP Coating / Paper / PE Coating / Paper / PP Coatings / Paper / Coatings PE / Paper / PE PP / Paper / PP Coating / PVOH / Paper / PVOH / Coating

[0019] In an embodiment, the structural component is made from a multi-layer sheet containing a cellulose content of greater than 60%, preferably greater than 80%.

[0020] In an embodiment, the cap comprises, as at least functional parts: assembly means for assembling the cap with the tube head; a sealing means between the cap and the tube head; Sealing areas at the ends of structural components

[0021] In embodiments, the functional component is made from a resin, such as, for example: PE or PP or PVOH PLA or other bio-based resins biodegradable resin Low or high temperature adhesives or multi-layer

[0022] In an embodiment, the functional part is the bottom of the packaging.

[0023] In an embodiment, the base comprises a cellulosic-based structural component and a resin-based functional component.

[0024] In an embodiment, the present invention relates to packaging comprising at least one component as defined in the present application.

[0025] In an embodiment, the packaging is, for example, a tube or a flask or a bottle or a can or a capsule or a pot.

[0026] In an embodiment, the packaging has a cellulose content of more than 50%, preferably more than 70%, or preferentially more than 85% total cellulose content. [Brief explanation of the drawings]

[0027] [Figure 1] Figure 1 shows an example of a cellulose-based tube head according to the invention, the tube head comprising at least 50% cellulose, preferably at least 70% cellulose. [Figure 2] Figure 1 shows an example of a cellulose-based tube head according to the invention, the tube head comprising at least 50% cellulose, preferably at least 70% cellulose. [Figure 3] Figure 1 shows an example of a cellulose-based tube head according to the invention, the tube head comprising at least 50% cellulose, preferably at least 70% cellulose. [Figure 4] Figure 1 shows an example of a cellulose-based tube head according to the invention, the tube head comprising at least 50% cellulose, preferably at least 70% cellulose. [Figure 5] Figure 1 shows an example of a cellulose-based tube head according to the invention, the tube head comprising at least 50% cellulose, preferably at least 70% cellulose. [Figure 6]Figure 1 shows an example of a cellulose-based tube head according to the invention, the tube head comprising at least 50% cellulose, preferably at least 70% cellulose. [Figure 7] 10A and 10B are diagrams illustrating examples of ribs that connect functional components. [Figure 8] 10A and 10B are diagrams illustrating examples of ribs that connect functional components. [Figure 9] 10A and 10B are diagrams illustrating examples of ribs that connect functional components. [Figure 10] 10A-10C show examples of functional areas that allow coupling between the tube head and the skirt. [Figure 11] 10A-10C show examples of functional areas that allow coupling between the tube head and the skirt. [Figure 12] 1A-1C show examples of cellulosic caps according to the present invention. [Figure 13] 1A-1C show examples of cellulosic caps according to the present invention. [Figure 14] 1 shows an example of a cellulosic packaging manufactured in accordance with the present invention and comprising at least a cellulosic skirt, a cellulosic tube head, and a cellulosic cap. [Figure 15] 1 shows an example of a cellulosic packaging manufactured in accordance with the present invention and comprising at least a cellulosic skirt, a cellulosic tube head, and a cellulosic cap. [Figure 16] FIG. 1 shows a cellulosic tube head according to the present invention that can be easily stacked. [Figure 17] FIG. 17 shows a stack of tube heads shown in FIG. 16. [Figure 18] FIG. 10 shows another example of a packaging component, in this case the bottom. [Figure 19] 1A-1C show an exemplary embodiment of packaging according to the present invention, showing a flexible tube for liquid, viscous or pasty products. [Figure 20] 1 shows an exemplary embodiment of packaging according to the present invention, showing a flask or bottle for a liquid product. [Figure 21] 1 shows an exemplary embodiment of packaging according to the present invention, showing can-type packaging for liquid products or solid products in powder or granular form. [Figure 22] 1A-1C show an exemplary embodiment of packaging according to the present invention, showing capsule-type packaging for powder or liquid products. [Figure 23] 1 shows an exemplary embodiment of packaging according to the present invention, showing a pot-type packaging with a screw-on or snap-on cover for solid powder or granular products, or for pasty products, or for viscous products. DETAILED DESCRIPTION OF THE INVENTION

[0028] Figures 1 to 6 show examples of cellulosic tube heads according to the invention. The tube heads in Figures 1, 3, 4 and 5 are presented in cross section.

[0029] 1 shows a cellulose-based tube head according to the present invention. The tube head 1 comprises a first cellulose-based structural part 2 and resin-based functional parts 3, 4, 5, 6, 7, 8.

[0030] The cellulose-based structural component 2 is preferably a multi-layer structure with a high cellulose content. The structural component 2 has barrier properties except at its edges. According to a preferred embodiment, the structural component 2 has barrier properties against water and steam, as well as against oxygen or fragrances or even oils. Examples of multi-layer structures of the structural component 2, listed from the outer surface to the inner surface, are as follows: Paper or Paper / Coating or Coating / Paper or Coating / Paper / Coating Paper / PE or PE / Paper or PE / Paper / PE Paper / PP or PP / Paper or PP / Paper / PP Coating / Paper / PVOH-PE or PE-PVOH / Paper / Coating PE / Paper / PE-EVOH-PE or PE-EVOH-PE / Paper / PE PE / Paper / Barrier PET-PE or PE Barrier PET / Paper / PE OPP / Paper / Barrier OPP-PP or PP Barrier OPP / Paper / OPP Coating / PVOH / Paper / PE Barrier OPP / Paper / PP

[0031] The structural component 2 contains a high cellulose fiber content. According to a preferred embodiment, the cellulose fibers come from the paper industry. The cellulose fibers may be first-use or may come from recycling.

[0032] According to an alternative embodiment, the structural component 2 contains natural fibers, such as wood fibers or semi-transformed products derived from the wood industry. Other equivalent materials are also possible.

[0033] The outer layer can be replaced by a coating or lacquer. The thickness of the structural part 2 is 300 to 1500 microns, preferably 700 to 1200 microns. The structural part 2 is suitably produced from a multi-layer sheet containing a cellulose content of more than 50%, preferably more than 70%. The structural part 2 can also be obtained by cellulose molding.

[0034] Figure 1 shows a tube head with the following functional parts: a welding area 3 limited by a stepped portion 4; Sealing areas 5 and 6 at the ends of the structural part 2; assembly means 7 for assembling the tube head with the cap; sealing means 8 between the tube head 1 and the cap; Orifice 9

[0035] These functional parts are made from resins such as: PE or PP or PVOH PLA or other bio-based resins biodegradable resin Low or high temperature adhesive For example, multi-layer structures such as PE / PVOH or PE / EVOH / PE or PP / PVOH or PP / EVOH / PP

[0036] The welded area 3 provides the connection between the tube skirt 11 (see Figures 10 and 11) and the tube head 1. The welded area is delimited by a stepped section 4 which is used to seal the end of the skirt 11, which is preferably cellulosic. The assembly of the tube head 1 and the skirt 11 is carried out, for example, by welding or overmolding; other equivalent methods are of course also possible.

[0037] The sealed regions 5 and 6, for example, allow the edges of the structural component 2 to be protected from moisture. More generally, the sealed regions prevent the migration of liquid or gaseous products into the cellulosic structural component 2. The sealed regions also prevent the migration of molecules contained in the cellulosic structural component 2 into the packaging.

[0038] The assembly means 7 make it possible to fix the cap on the tube head for opening and closing the packaging, for example by a thread if the cap is screwed onto the tube head, or even by a means for fixing the cap by a snap fit if the cap has a hinged opening / closing system.

[0039] The tube head preferably also has sealing means making it possible to seal the tube head with the cap.

[0040] The functional areas 3, 4, 5, 7, 8 and 9 are obtained, for example, by an injection-based overmolding process of the cellulosic structural component 2 (see WO 2018 / 073735, which is incorporated by reference). An alternative method consists in using a compression molding process to overmold the cellulosic structural component 2. Another alternative consists in welding or gluing a monolayer or multilayer film to form the functional areas 3, 4, 5 and 6.

[0041] Figure 2 is a top view of the tube head presented in Figure 1. Figures 1 and 2 provide an understanding of the gist of the present invention, which is to maximize the cellulose content in the tube head 1 by minimizing the addition of resin in the functional areas. The use of resin in the functional areas is preferred to ultimately obtain a robust and manipulable packaging for the packaged product.

[0042] Figure 3 shows a cellulose-based tube head 1 according to the invention. The tube head 1 shown in Figure 3 is similar to that shown in Figure 1, but has a cone-shaped cellulose-based structural part 2 connecting peripheral functional parts 3, 4, 5 with central functional parts 7, 8, 9 of the head. Figure 3 illustrates the fact that the cellulose-based structural part 2 can have a complex three-dimensional shape. This part 2 of the cellulose-based tube head 1 can be obtained from a cellulose-based single- or multi-layer sheet, such as a moldable sheet of paper or cardboard. An alternative is to manufacture the structural part 2 of the tube head 1 by cellulose molding.

[0043] FIG. 4 shows a tube head 1 with minimal resin addition. In this tube head, a cellulose-based structural component 2 is present in all sections of the tube head. Functional areas 3, 4, 5, 6, 7, and 8 are obtained by adding a thin layer of resin onto the structural component 2. It may be preferable to use a single-layer or multilayer film of resin to manufacture the functional components 3, 4, 5, 6, 7, and 8. The use of thin films welded or glued within the functional areas allows for the amount of resin in the packaging to be minimized. The tube head 1 shown in FIG. 4 offers the advantage of a very high cellulose content while maintaining the same functionality as polyethylene or polypropylene-based tube heads. The tube head shown in FIG. 4 has a cellulose content of more than 70%, preferably more than 85%.

[0044] Figure 5 shows a tube head 1 similar to that shown in Figure 4, but in which the inner surface of the cellulosic structural component is covered with a functional resin. Preferably, the functional resin is in the form of a thin monolayer or multilayer film, which is welded at least around the periphery of the regions 3, 4, and 5. The film can also be welded over the entire inner surface. This variant makes it possible, for example, to use a monolayer cellulosic structural component 2, which can be pre-manufactured by cellulose molding. The cellulosic structural component 2 can be made rigid by adding a functional resin that covers the entire inner surface of the structural component 2 and connects the functional components 3, 4, 5, 6, 7, and 8.

[0045] Another embodiment of the invention not shown is similar to that shown in Figure 5, but consists in having a tube head with a thin film of synthetic resin that not only covers the inner surface of the shoulder but also blocks the orifice. The film can therefore be used as a tamper-evident telltale for the packaging, and must be pierced on first use to allow the product contained in the packaging to be extracted.

[0046] 6 shows an example of a tube head according to the present invention, viewed from above, with resin ribs 10 connecting the central and peripheral functional areas. These ribs 10 allow the tube head 1 to be manufactured by overmolding the cellulosic structural component 2 using a single centrally located injection point in an injection process. Resin is supplied to the peripheral functional areas by passing through the ribs 10. Alternatively, the tube head can have no ribs 10, and the central and peripheral functional components are injected through separate injection points. Other equivalent methods can also be envisioned.

[0047] 7, 8 and 9 show examples of ribs 10 in cross section.

[0048] FIG. 7 shows an example of a rib located on the inner surface of the tube head and protruding from the surface of the structural component 2.

[0049] Figure 8 shows another example of ribs 10 formed by passages made in the thickness of the structural part 2. The ribs 10 can be obtained by suitable shaping of the structural part 2 before the overmolding operation.

[0050] Figure 9 shows another example of ribs embedded in the structural part 2. Partially embedded ribs can also be produced. Combinations of different ribs are also possible.

[0051] 10 and 11 show the assembly areas of the tube head 1 and the tube skirt 11. Assembly can be performed by welding or, alternatively, by overmolding. As shown in FIG. 10, the present invention allows the end of the cellulosic structural component 2 to be sealed using a resin added to the functional area 5, the tube head 1 and the skirt 11 to be welded using a resin added to the welding functional area 3, and the end of the skirt 11 to be sealed using a resin added to the functional area and forming the stepped portion 4.

[0052] The barrier layers against moisture and gases or aromas present in the skirt 11 and tube head 1 are not shown because they are very thin. In many packagings, it is preferable to place one or more barrier layers near the inner surface, through the thickness of the skirt, in conjunction with one or more barrier layers near the outer surface, through the thickness of the tube head. Thus, during assembly (when the tube head is placed inside the skirt and secured together), the barrier layers of the tube head 1 and skirt 11 are in close proximity to each other, ensuring barrier continuity at the weld and therefore a very robust packaging.

[0053] In other cases, it may also be desirable to limit the migration of aromas in the walls of the packaging. In this case, it may be preferable to place a barrier layer against aromas close to the inner surface and in the thickness of the tube head 1. This barrier layer may replace or be in addition to any barrier layer already present on the outer surface of the tube head 1.

[0054] Thus, according to the present invention, the tube head 1 has a gas barrier layer preferentially near its outer surface, while the skirt 11 has a gas barrier layer preferentially near its inner surface. Alternatively, the tube head is provided with a gas or aroma barrier layer near its inner surface. Alternatively, the tube head is provided with two gas and aroma barrier layers, a first barrier layer near its outer surface and a second barrier layer near its inner surface.

[0055] Thus, in the context of the present invention, different configurations and arrangements of one or more layers are possible, for example depending on the respective position of the components and / or the desired effect.

[0056] Figure 11 shows another configuration for assembling the tube head 1 and the skirt 11. It shows the assembly obtained by welding the tube head 1 and the skirt 11. The assembly is preferably produced by hot air welding, one alternative solution is to use ultrasound. Other equivalent methods are of course also possible.

[0057] Another aspect of the present invention relates to a cellulosic opening / closure system, such as a tube cap. Figures 12 and 13 show examples of cellulosic tube caps according to the present invention. The tube caps are presented in cross section.

[0058] FIG. 12 shows an example of a cellulose-based tube cap 12 according to the present invention, which comprises a first cellulose-based structural component 13 and resin-based functional components 14 and 17 .

[0059] The cellulose-based structural component 13 is preferably a multi-layer structure with a high cellulose content. The structural component 13 is liquid-resistant except at its edges. According to a preferred embodiment, the structural component 13 is resistant to liquids such as water or oil. Examples of multi-layer structures of the structural component 13 are listed below, from the outer surface to the inner surface: paper Paper / PE Paper / PP Coating / Paper / PE Coating / Paper / PP Coatings / Paper / Coatings PE / Paper / PE PP / Paper / PP Coating / PVOH / Paper / PVOH / Coating

[0060] The thickness of the structural component 13 is between 500 and 1500 microns, preferably between 700 and 1200 microns. The structural component 13 is suitably manufactured from a multi-layer sheet containing a cellulose content of more than 60%, preferably more than 80%. The structural component 13 can also be obtained by cellulose molding.

[0061] FIG. 12 shows a cellulosic cap with the following functional parts: assembly means 17 for assembling the cap with the tube head; sealing means 14 between the cap and the tube head; Optionally, sealing regions 16 at the ends of the structural components 13

[0062] These functional parts 14 to 17 are made of, for example, the following resins: PE or PP or PVOH PLA or other bio-based resins biodegradable resin Low or high temperature adhesive

[0063] The interface 15 provides a connection between the resin functional component and the resin structural component. The interface 15 can be welded or glued. Overmolding, welding or glueing methods, or other equivalent methods can be envisioned.

[0064] Assembly means 17 are used to fix the cap 12 onto the tube head 1 and to allow opening and closing of the packaging. Fixing means are, for example, a thread if the cap is screwed onto the tube head, or for example a snap-fit ​​means or other equivalent means.

[0065] The cap 12 preferably has a sealing means 14 made of resin that allows a seal with the cap when the packaging is closed.

[0066] The optional sealed area 16 makes it possible, for example, to protect the edges of the cellulosic structural component 13 from moisture. More generally, the sealed area 16 prevents the migration of liquid products into the cellulosic structural component 13. The addition of the sealed area 16 depends on the conditions of use of the packaging, in particular the environment (dry or wet) in which it will be used.

[0067] The functional regions 14, 16 and 17 are obtained, for example, by injection overmolding of the cellulosic structural component 13 (see WO 2018 / 073735, which is incorporated by reference). One alternative is to use a compression molding process to overmold the cellulosic structural component 13. Another alternative is to assemble a resin central part by gluing or welding.

[0068] 13 shows an example of a hinged cap 12 intended to be fixed onto a tube head 1. The hinged cap 12 is cellulosic and comprises a sheet 18 connected to a cover 19 by a hinge 20. The cap 12 comprises structural parts 13 of the sheet and cellulosic cover. The cap also comprises functional parts made of resin, including assembly means 17, sealing means 14 and 21, hinge 20, and optional sealing area 16.

[0069] Assembly means 17 are used to fix the cap 12 onto the tube head 1 and allow the packaging to be opened and closed. The fixing means are, for example, threads or snap-fit ​​means or other equivalent means.

[0070] The cap 12 preferably has a plastic sealing means 14 that enables sealing between the seat 18 and the tube head 1, and a plastic sealing means 21 that enables sealing between the seat 18 and the cover 29 to be ensured.

[0071] By making the hinge 20 from resin, the cover can be opened and closed multiple times.

[0072] Optional sealed area 16 protects the edges of cellulosic structural component 13 of sheet 18 and cover 19 from moisture.

[0073] The functional areas 14, 16, 17, 20 and 21 are obtained, for example, by injection overmolding of the cellulosic structural component 13 (see WO 2018 / 073735, which is incorporated by reference). One alternative consists in overmolding the cellulosic structural component 13 using a compression molding method. Another alternative consists in assembling the functional components by gluing or welding.

[0074] Another aspect of the present invention relates to a cellulose tube comprising at least a cellulose skirt and a cellulose tube head, or at least a cellulose skirt and a cellulose cap. Figure 14 shows another subject of the present invention, which is a cellulose tube obtained from the cellulose tube head and cellulose skirt 11 shown in Figure 1. This tube is also associated with a cellulose cap, as shown in Figure 13. The tube excluding the cap has a cellulose content of more than 50%, preferably more than 70%. The finished packaging according to the invention, i.e. the tube with its cellulose cap, also has a cellulose content of more than 50%, preferably more than 70%. According to a preferred embodiment, the packaging has a total cellulose content of more than 85%.

[0075] In an embodiment, the skirt 11 used in the context of the present invention may be made from the following materials: Paper / PE or Paper / PP or Paper / Coating PE / Paper / PE or PP / Paper / PP or Coated / Paper / Coated Coating / Paper / PVOH / PE PE / Paper / PE-EVOH-PE PE / Paper / Barrier PET / PE OPP / Paper / Barrier OPP / PP Coating / PVOH / Paper / PE PE-EVOH-PE / Paper / PE Barrier OPP / Paper / PP

[0076] FIG. 15 shows another example of cellulosic packaging with a cellulosic cap 12 fixed directly onto the tube head 1 .

[0077] FIG. 16 shows a cellulosic tube head 1 according to the invention that can be easily stacked.

[0078] FIG. 17 shows a tube head stack that facilitates handling and storage during the manufacturing process.

[0079] Figure 18 shows another example of a packaging component made in accordance with the present invention. Figure 18 shows a cellulosic packaging base 25 intended to be assembled onto cellulosic packaging to form a bottle or flask. Base 25 comprises a cellulosic structural component 26 and resin-based functional components 27, 28, and 29.

[0080] 19 to 23 show examples of packaging that can be produced according to the present invention.

[0081] Figure 19 shows a flexible tube 100 comprising a skirt 11, a tube head 1 and a cap 12. According to the invention, a tube with a high cellulose content can be obtained. An advantage of the invention is that the addition of resin is minimized, since this is only done in the functional areas located at the interfaces between the components, as described above.

[0082] FIG. 20 shows a second example of packaging manufactured in accordance with the present invention: a flask or bottle 101 intended to contain a liquid product. The flask includes a skirt 11, a neck 30, a bottom 25, and a cap 12. The thickness of the cellulosic skirt is adjusted to provide a sufficiently rigid cylinder. The flask or bottle includes primarily cellulosic structural components: the neck, bottom, and cap. Resin is added locally to functional parts / areas located at the interfaces between the components. For example, resin is preferably added in accordance with the principles of the present invention to the junction between the bottom 25 and the skirt 11, the junction between the neck 30 and the skirt 11, and the interface between the neck 30 and the cap 12.

[0083] Figure 21 shows a can-shaped packaging 102 intended to contain a powder or granular product, or even a liquid product. The can comprises a skirt 11, a bottom 25, and an end provided with an opening system 12 comprising structural and functional components according to the principles of the present invention. The opening system 12 can range from the simplest version, such as a lid that is torn off upon opening, to the most complex version with a reclosable cap. The present invention provides a connection between the components of the packaging, making it possible to ensure its functionality with a limited resin content.

[0084] FIG. 22 shows a capsule 103 intended to contain a product in powder form (e.g., coffee) or liquid form. The packaging comprises, as structural components, a cellulose cone 32 and a lid 31 welded onto the cone. In some cases, the capsule also comprises a second lid that closes the orifice at the bottom of the capsule. The invention allows the resin content in the capsule to be minimized by adding resin only to the collar 33 (functional component 34) to ensure a tight weld with the lid 31 and ensure the functionality of the capsule. For example, in the case of a coffee capsule, the addition of resin allows the capsule to be sealed tightly with the coffee machine when used.

[0085] Figure 23 shows a pot 104 intended to contain a paste or cream product, or even a product in powder or granular form. The pot comprises a skirt 11, a base 25 and a cap 12 having structural and functional parts as described in this application. The base 12 can be screwed or snapped onto the skirt 11.

[0086] This list of examples should not be considered limiting, and the present invention may be suitably used in packaging that contains a high cellulose content and requires the addition of small amounts of resin in the functional part, as described in detail in this application.

[0087] The described embodiments are provided as illustrative examples and should not be considered limiting. Other embodiments may, for example, use equivalent means to those described. The embodiments may also be combined with one another depending on the circumstances, or means used in one embodiment may be used in another embodiment. [Explanation of symbols]

[0088] 1: Tube head 2: Tube head structural parts 3: Welding area 4: Staircase 5:Sealing area 6:Sealing area 7: Tube head assembly method 8: Tube head sealing means 9: Tube head orifice 10: Supply rib 11: Skirt 12: Cap 13: Cap structural parts 14: Cap sealing means 15: Welded or bonded interfaces 16:Sealing area 17: Cap assembly means 18: Cap sheet 19: Cap cover 20: Hinge 21: Cover sealing means 22: Cover closed end joint 23: Welded or bonded interface 24: Seat orifice 25: Bottom of packaging 26: Bottom structural parts 27: Welding area 28: Staircase 29:Sealing area 30: Neck 31: Lid 32: Cone 33: Color 34: Functional parts 100: Tube-type packaging 101: Flask or bottle packaging 102:Can-shaped packaging 103: Capsule-type packaging 104: Pot-shaped packaging

Claims

1. A packaging component, such as a tube, comprising: The packaging part is, for example, a tube head (1), a cap, a bottom or a capsule body, and comprises structural parts (2, 11, 12, 13, 26, 30, 32, 33) and at least one functional part (3-8, 14-18, 20-24, 27-29, 34), wherein the structural parts have a high cellulose content and the functional parts have a lower cellulose content.

2. 2. Packaging part according to claim 1, wherein the cellulose content of the structural part is at least above 50%, suitably above 70%, preferably above 85%.

3. 3. The packaging part according to claim 1 or 2, wherein the structural part has a cellulosic single-layer or multi-layer structure.

4. The packaging part according to any one of claims 1 to 3, which is a tube head (1) or a capsule body (32).

5. The multi-layer structure, from the outside to the inside, Paper / PE or paper / PP or paper / coating, PE / paper / PE or PP / paper / PP or coating / paper / coating, Coating / Paper / PVOH / PE, PE / Paper / PE-EVOH-PE, PE / paper / barrier PET / PE, OPP / paper / barrier OPP / PP, Coating / PVOH / paper / PE, PE-EVOH-PE / paper / PE, Barrier OPP / Paper / PP 5. The packaging part according to claim 3 or 4, wherein

6. The packaging part according to any one of claims 1 to 5, wherein the outer layer is a layer of coating type and / or lacquer.

7. 7. The packaging part according to any one of claims 4 to 6, wherein the structural part is made from a multi-layer sheet containing a cellulose content of more than 50%.

8. The tube head (1) has, as functional parts, welding area (3), Sealing areas (5, 6) at the ends of the structural components; assembly means (7) for assembling said tube head with a cap; a sealing means (8) between the tube head and the cap; Orifice (9) The packaging part according to any one of claims 4 to 7, comprising at least

9. The functional part is, for example, PE or PP or PVOH, PLA or other bio-based resins, biodegradable resin, low or high temperature adhesives, or multi-layer The packaging part according to any one of claims 1 to 8, which is made from a resin such as

10. The packaging part according to any one of claims 1 to 3, which is a cap (12).

11. The multilayer structure of the structural part may be, for example, from the outer surface to the inner surface, paper, Paper / PE, paper / PP, Coating / paper / PE, Coating / paper / PP, Coatings / Paper / Coatings, PE / paper / PE, PP / paper / PP, Coating / PVOH / Paper / PVOH / Coating The packaging component of claim 10, comprising:

12. 12. Packaging part according to claim 10 or 11, wherein the structural part is made from a multi-layer sheet containing a cellulose content of more than 60%, preferably more than 80%.

13. The cap has, as at least a functional part, assembly means for assembling said cap with said tube head; a sealing means between the cap and the tube head; Sealing areas at the ends of the structural components The packaging part according to any one of claims 10 to 12, comprising:

14. The functional part is, for example, PE or PP or PVOH, PLA or other bio-based resins, biodegradable resin, low or high temperature adhesives, or multi-layer The packaging part according to any one of claims 10 to 13, made from a resin such as

15. The packaging part according to any one of claims 1 to 14, which is a packaging bottom.

16. The packaging component of claim 15 , wherein the base comprises a cellulose-based structural component and a resin-based functional component.

17. Packaging comprising at least one packaging part according to any one of claims 1 to 16.

18. 18. Packaging according to claim 17, which is a tube (100) or a flask (101), or a bottle, or a can (102), or a capsule (103) or a pot (104).

19. Packaging according to claim 17 or 18, having a cellulose content of more than 50%, preferably more than 70%, or preferentially more than 85% total cellulose content.

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