A lid made of paper

Abstract

A lid (100) and a corresponding method of manufacturing a lid (100) for closing a container are described. The lid (100) has a helically wound sleeve (101) including a first opening (105) and a second opening (104), wherein the first opening (105) and the second opening (104) are opposite to each other. Furthermore, the lid (100) has an upper end piece (102), wherein the upper end piece (102) is configured to close the first opening (105) of the sleeve (101). The sleeve (101) is made of paper. The second opening (104) of the sleeve (101) has a reinforcing element (106), and the reinforcing element (106) is a structure extending into the interior of the sleeve (101).

Description

Technical Field

[0001] This invention relates to a paper lid for sealing containers, particularly aerosol cans. Furthermore, this invention relates to a method for manufacturing a lid for sealing containers. Background Technology

[0002] Lids made of petrochemical plastics (particularly polypropylene or polyethylene), especially for aerosol cans, are known. Typically, such conventional lids for aerosol cans are manufactured using methods such as injection molding. Generally, conventional lids have lower reusability or renewability and are very energy- and cost-intensive, leading most conventional lids to be disposed of as waste in landfills or as fuel in incinerators. Therefore, conventional lids for aerosol cans have a poor CO2 footprint and poor environmental sustainability. The CO2 footprint is the sum of greenhouse gas emissions along the entire lifecycle of a product in a defined application and over a defined use unit. Summary of the Invention

[0003] The object of the present invention is to provide a sustainable lid for containers, particularly aerosol cans, which can be secured by force-locking and form-locking and is easily regenerable, reusable, or compostable.

[0004] A lid for sealing a container is described according to a first aspect of the invention. The lid has a helically wound sleeve including a first opening and a second opening. The first opening and the second opening are disposed opposite to each other. Furthermore, the lid has an upper end piece, wherein the upper end piece is configured to close the first opening of the sleeve. The sleeve is made of paper. The second opening of the sleeve has a reinforcing element, wherein the reinforcing element is a structure extending into the interior of the sleeve.

[0005] According to another aspect of the invention, a method for manufacturing a lid for sealing a container is described. The method comprises the steps of: (i) spirally winding a sleeve having a first opening and a second opening, wherein the first opening and the second opening are opposite to each other; (ii) providing an upper end piece such that the upper end piece closes the first opening of the sleeve, wherein the sleeve is made of paper; and (iii) providing a reinforcing element at the second opening of the sleeve, wherein the reinforcing element is a structure extending into the interior of the sleeve.

[0006] The sleeve can be a tubular, elongated, or cylindrical robust sleeve. In an exemplary embodiment, the tubular, elongated, or cylindrical sleeve is characterized by having two openings, which are opposite each other along the longitudinal direction and are, for example, the base surface of a cylinder. The sleeve can particularly form a rotationally symmetric body, the axis of symmetry (central axis) of which extends parallel to the longitudinal direction. The sleeve corresponding to the side surface of the cylinder can be uniform, i.e., without other openings or recesses in the side surface. Alternatively, in addition to the two opposite openings that can form the base surface of the cylinder, at least one additional opening or recess exists. The sleeve can have a diameter of 30 mm to 74 mm, particularly 35 mm to 65 mm.

[0007] In the context of this invention, the "interior of the sleeve" constitutes an internal volume, which is surrounded in the extending direction by the side surfaces of the sleeve. The longitudinal direction of the sleeve, or its central axis, is orthogonal to the radial direction of the sleeve.

[0008] In the context of this application, the term "reinforcing element" can constitute a fully or partially circumferential flange that extends from the side surface of the sleeve into the interior of the sleeve, or rather, into its internal volume, and contributes to the sleeve's reinforcement, mechanical strength, and shape stability. Furthermore, the reinforcing element serves as a fastening device for capping compatible cans, particularly aerosol cans, because it extends into the internal volume and thus forms a detachable connection, for example, with the can's receiving groove. The reinforcing element can form an integral area with the sleeve or consist of separate elements made of a different material from the sleeve. The reinforcing element can also be multiple partially circumferential flange segments that extend into the interior of the sleeve. Here, the reinforcing element extends radially inward by 1% to 10% of the sleeve's diameter. Additionally, the reinforcing element extends radially inward by 1% to 10% of the sleeve's diameter and also longitudinally by 5% to 20% of the sleeve's length.

[0009] In the context of this application, the term "paper" refers to a flat material, such as that made of fibrous materials, particularly plant-derived fibrous materials (e.g., pulp, wood pulp, and waste pulp). Exemplary embodiments of "paper" include not only paper sheets but also paperboard and linerboard, which are distinguished according to their mass per unit area according to DIN 6730. DIN 6730 defines paper as having a mass per unit area of ​​7 g / m³. 2 Up to 225g / m 2 The paperboard has a unit area mass of 150g / m². 2 Up to 600g / m 2 The mass per unit area, while thick paper has a mass ranging from 225 g / m². 2The mass per unit area of ​​the paper. Furthermore, an exemplary embodiment of "paper" could also be a thin wood veneer or cork veneer having a thickness similar to paper. Additionally, the paper may contain up to 5% impurities.

[0010] The sleeve according to the invention is manufactured by a spiral winding method, wherein at least one glued paper web is wound onto a fixed mandrel, overlapping or butt-together, according to the intended use and the associated strength requirements. Here, each glued paper web constitutes one layer of winding. During the spiral winding method, single layers, multiple single layers overlapping, or multiple single layers overlapping alternately can be wound. To provide these layers, the edges of the paper webs can be overlapped along the length of the sleeve, wherein the overlapping areas of the paper webs are firmly secured, particularly bonded, to each other.

[0011] The upper end piece can be formed of paper in a single layer or multiple layers.

[0012] The lid for sealing containers according to the invention has a good CO2 footprint and environmental sustainability, and thus helps reduce non-recyclable waste. This is achieved by the lid being entirely (i.e., not only the sleeve but also the top plate) made of paper. Manufacturing the paper lid by spirally winding the paper web into a sleeve results in a robust and durable lid that also seals the container against aerosols or other fluids. Furthermore, the paper lid can be adapted in height, diameter, and material thickness without significant expense and cost, and can be designed with visual appeal, such as colorful designs, or tactile appeal, such as embossing. Therefore, lid manufacturing can also be achieved economically in small batches. Moreover, the lid can be easily adapted in height, diameter, and material thickness using spiral winding technology, as complex adaptations to manufacturing equipment are not required. This also allows for economical small-batch production of the lid. Furthermore, it is possible to deform the top plate by embossing to achieve specific visual or tactile effects. In addition, cylindrical sections can be specially processed to have visual, tactile, or application-specific deformations; for example, grip grooves to allow for better gripping and removal of the cap.

[0013] According to another exemplary embodiment of the invention, the first opening has a flange, particularly a rolled edge (e.g., having a circular cross-section). The flange extends into the interior of the sleeve, and the upper end piece is coupled or secured to the portion of the flange that extends into the interior of the sleeve.

[0014] The flange can be a fully or partially circumferential flange that extends from the (inner) surface of the sleeve into the interior or internal volume of the sleeve. A rolled edge is a thickened portion or flange that reinforces the bent edge of the sleeve by rolling, i.e., bending, the edge of the sleeve inward.

[0015] The upper end piece and the rolled edge are coupled or fastened to each other, for example, by means of material bonding (adhesive bonding) and / or pressure bonding. An exemplary connection can be achieved by applying adhesive to the upper end piece and / or the rolled edge. Here, bonding can be achieved completely (i.e., along the entire support surface of the upper end piece on the rolled edge) or in points (preferably by means of three bonding points). Furthermore, the connection between the upper end piece and the rolled edge can also be achieved by pressure fitting.

[0016] This exemplary embodiment offers the advantage of providing a stable and secure fastening of the upper tab on the crimp. This reliably prevents the upper tab from detaching or slipping, thereby improving the cap's resistance and durability. Furthermore, the coupling or arrangement of the upper tab on the portion of the crimp extending into the interior of the sleeve has the advantage of securing the upper tab within the sleeve, i.e., within the region of the sleeve's cylindrical volume. Therefore, the secure fastening of the upper tab can be protected from environmental influences, which also contributes to the improved resistance and durability of the cap.

[0017] According to another exemplary embodiment of the present invention, the outer surface of the sleeve and / or the inner surface of the sleeve are provided with a synthetic or bio-based coating.

[0018] In the context of this application, the term "outer surface" refers to a surface of the sleeve that is in direct contact with and thus subject to environmental influences. The term "inner surface" refers to a surface of the sleeve that exists within the interior of the sleeve. In another embodiment, the "inner surface" of the upper end piece existing within the interior of the sleeve and / or the "outer surface" of the upper end piece that is in direct contact with the environment may also be provided with a synthetic or bio-based coating.

[0019] Synthetic or bio-based coatings can be applied to the outer or inner surfaces. The coating is impermeable, allowing the paper layers of the sleeve to be isolated, sealed, or encapsulated. An exemplary embodiment of a synthetic or metal-based coating is a thin-walled plastic layer, such as PE or PP, or a metal layer, such as aluminum foil. The coating may also be dyed. An exemplary embodiment of a bio-based coating is made of materials such as cork, wood, wax, or bio-based plastics, such as PLA. However, exemplary embodiments are not limited to the materials mentioned above. The coating has a wall thickness / thickness of no more than 20% of the total weight of the cap, preferably less than 5% of the total weight of the cap, to ensure the recyclability of the cap.

[0020] This exemplary embodiment has the advantage of improving the sleeve's resistance to substances such as grease, oil, and water. Therefore, the durability of the cap can be improved.

[0021] According to another exemplary embodiment of the invention, the sleeve comprises at least one inner layer and at least one outer layer. The two layers are spirally wound.

[0022] The outermost layer is the outermost paper layer in the radial direction and has an outer surface. The inner layer is a paper layer with an inner surface. Multiple other layers may be disposed between the inner and outer layers.

[0023] The thickness of the sleeve can be adjusted to any value by using a certain number of layers. This improves the strength and shape stability of the sleeve.

[0024] According to another exemplary embodiment of the invention, the reinforcing element has a thickened region, or flange, at the second opening of the sleeve. The thickened region can be provided by crimping the end region of the sleeve into the interior of the sleeve, wherein the crimped end region of the sleeve is compressed in the radial direction.

[0025] The end region of the sleeve at the second opening is the region directly existing at the second opening of the sleeve and having the end edge of the sleeve. After the hemming, or after the end region of the sleeve is folded inward, there may be cavities between the layers that are attached after the folding, or the layers may loosely adhere to each other. To achieve a better reinforcement effect, pressure can be applied in the radial direction to press and compact the layers that are attached.

[0026] This exemplary embodiment has the advantage of creating a thickened area that, on the one hand, improves the shape stability of the sleeve or cap, and on the other hand, reduces the diameter of the cap in the second opening of the sleeve. By reducing the inner diameter at the second opening of the sleeve, the cap can be securely and non-sliply fastened to the compatible can, particularly aerosol cans. The can may have a corresponding receiving groove for the thickened area or flange for better securing. The inner diameter on the flange can be configured and adjusted so that the filled can can be lifted using only the cap, without the cap detaching from the compatible can.

[0027] The end region or end edge of the sleeve describes the axial end of the sleeve.

[0028] The cut edges of the sleeve describe the open cross-section of each layer. The risk of moisture penetrating between the layers and causing loosening or swelling occurs when each layer ends with an open cut edge in the axial direction. By crimping or folding the end regions of the sleeve into the interior, the outer layer surrounds the axial ends of the sleeve, reducing the amount of moisture that can penetrate between the layers. Here, the cut edges are present inside the sleeve. This improves the cap's resistance and durability.

[0029] According to another exemplary embodiment of the invention, the reinforcing element has a thickened region on the second opening of the sleeve. The thickened region is provided by means of an adhesive coating, particularly a recyclable adhesive.

[0030] The recyclable adhesive is renewable and / or adds only a slight environmental burden. Exemplary embodiments of recyclable adhesives include materials such as natural rubber, formaldehyde-free dispersion adhesives (PVAC sugar-adhesives), and lignin-based polymer adhesives (lignin gums).

[0031] This exemplary implementation has the advantage that it creates a thickened area that, on the one hand, improves the shape stability of the sleeve or cap, and on the other hand, reduces the diameter of the cap in the second opening of the sleeve. This ensures that the cap securely and non-sliply attaches to compatible cans, particularly aerosol cans. Furthermore, by applying adhesive to seal the open cut edges of the sleeve in the second opening, protection against environmental influences, such as air humidity, is provided. Therefore, the cap's resistance and durability are improved.

[0032] According to another exemplary embodiment of the invention, the reinforcing element has a thickened region at the second opening of the sleeve. The thickened region is provided by folding the outer layer into the interior of the sleeve, such that the outer layer at least partially covers at least one of the inner layers (at its radial end).

[0033] This exemplary embodiment has the advantage that it also creates a thickened area that, on the one hand, improves the shape stability of the sleeve or cap, and on the other hand, reduces the diameter of the sleeve in the second opening of the sleeve. This ensures that the cap securely and non-sliply attaches to compatible cans, particularly aerosol cans. Furthermore, by folding the outer layer into the interior of the sleeve, wherein the outer layer at least partially covers at least one inner layer, protecting the cut edges of the inner layer below the opening of the sleeve, protection against environmental influences, such as the intrusion of air humidity, is provided. Therefore, the cap's resistance and durability are improved.

[0034] According to another exemplary embodiment of the invention, the setting of the upper end piece includes the following method steps: (I) rolling the first opening of the sleeve, in particular rolling it into a circular cross-section, (II) conveying the upper end piece, and (III) coupling the upper end piece to the rolled edge, the rolled edge extending into the interior of the sleeve, in particular coupling the upper end piece to the portion of the rolled edge that is set inside the sleeve.

[0035] According to another exemplary embodiment of the invention, a reinforcing element with a thickened region is provided on the second opening of the sleeve. The thickened region is provided by one of the following: (a) crimping the second opening, in particular crimping it to have a circular cross-section, and then compressing the resulting crimp in its radial direction; (b) providing an adhesive, in particular a recyclable adhesive, on the second opening; and (c) when the sleeve comprises at least one inner layer and at least one outer layer, folding the outer layer of the sleeve such that the outer layer at least partially covers at least one of the inner layers.

[0036] It should be noted that the embodiments described herein are merely limited options for possible variations of the invention. Therefore, it is possible that features of the various embodiments can be combined with each other in a suitable manner, so that, to those skilled in the art, many different embodiments may be regarded as obvious disclosures within the detailed description of the variations herein. Attached Figure Description

[0037] Figure 1 A cross-sectional view of one embodiment of the cover according to the present invention is shown.

[0038] Figure 2 Showing according to Figure 1 A side view of a cover according to an embodiment of the present invention.

[0039] Figure 3 Showing according to Figure 1 A cross-sectional view of a detailed embodiment of the reinforcing element in the cover according to the present invention.

[0040] Figure 4 Showing according to Figure 1 A cross-sectional view of a detail of another embodiment of the reinforcing element in the cover according to the invention.

[0041] Figure 5 Showing according to Figure 1 A cross-sectional view of a detail of another embodiment of the reinforcing element in the cover according to the invention. Detailed Implementation

[0042] It should be noted that in the following detailed description, features or components of different embodiments (which are the same or at least functionally the same as corresponding features or components of other embodiments) are given the same reference numerals or are given reference numerals as follows, wherein the last two digits of the reference numerals correspond to the reference numerals of the corresponding same or at least functionally the same features or components. To avoid unnecessary repetition, features or components already described with reference to the previously described embodiments will not be described in detail later.

[0043] Furthermore, it should be noted that the illustrations in the accompanying drawings are schematic and not to scale.

[0044] Furthermore, it should be noted that spatial terms, such as "front" and "back," "up" and "down," "left" and "right," are used to describe the relationship between an element and another element or multiple elements, as shown in the accompanying drawings. Therefore, spatial terms can be applied to orientations different from those shown in the accompanying drawings. However, it is self-evident that all such spatial terms, for the sake of brevity, relate to the orientation shown in the figures and are not unconditionally restrictive, as the corresponding devices, components, etc., may take on orientations different from those shown in the figures during use.

[0045] Figure 1 A lid 100 for sealing containers, particularly aerosol cans, is shown. The lid 100 includes a helically wound sleeve 101, which includes a first opening 105 and a second opening 104. The first opening 105 and the second opening 104 are opposite each other. Furthermore, the lid 100 has an upper end piece 102, wherein the upper end piece 102 is configured to close the first opening 105 of the sleeve 101. The sleeve 101 and the upper end piece 102 are made of paper. The second opening 104 of the sleeve 101 has a reinforcing element 106, wherein the reinforcing element 106 is a structure extending into the interior of the sleeve 101.

[0046] The cover 100 has an elongated cylindrical, tubular sleeve 101. The sleeve 101 has a length a, a thickness or material thickness b, and a width c. The width c is defined as the distance along the radial direction RR within the first opening 105 of the sleeve 101 between the outer surfaces 107 of the sleeve 101. The sleeve 100 is, in particular, a rotationally symmetric body, whose axis of symmetry (central axis) extends parallel to the longitudinal direction LR. The radial direction RR extends perpendicular to and intersects the central axis. The length a is defined as the distance between the first opening 105 and the second opening 104. The thickness or material thickness b is defined as the distance between the radially inner surface 108 and the radially outer surface 107. Here, the thickness or material thickness b of the sleeve 101 is determined by the number of paper layers and the thickness of the paper layers. The sleeve 101 and the upper end piece 102 can be composed of the same or different numbers of paper layers. Figure 1 In the embodiment shown, the cover 100, i.e. the sleeve 101 and the upper end piece 102 have three layers, i.e., spirally wound paper webs.

[0047] Furthermore, the sleeve 101 has a first opening 105 and a second opening 104. A rolled edge 103 is directly provided on the first opening 105. Rolled edges are commonly used for the folded edges of reinforcing structures and are formed by means of the edge of the bent structure. The rolled edge 103 is circumferential and has a circular shape in a cross-sectional view, the circular shape extending not only inward in the radial direction RR but also outward in the length direction LR. In other words, the rolled edge 103 extends into the region corresponding to the cylindrical volume of the sleeve. The second opening 104 is opposite to the first opening 105, wherein the first opening 105 and the second opening 104 respectively form the bottom surface of the cylinder, or sleeve 101. After the end region of the sleeve is rolled or after the end region of the sleeve is folded inward, it can be as follows: Figure 1 There are cavities between the layers that fit together after folding, or in other words, the layers can fit together loosely.

[0048] The sleeve 101 is uniform, meaning that apart from the first opening 105 and the second opening 104, there are no other openings or recesses in the side surface of the sleeve 101. In another exemplary embodiment, at least one additional opening may be provided in the sleeve, for example, in the side surface or the upper end piece. This has the advantage that, for example, the head area of ​​the can, which may remain in the shower device, can be kept dry and the valve seat covered by the cap can be prevented from being corroded by water, because water can drain through the additional opening. This also prevents water from penetrating the cap due to long-term effects.

[0049] An upper end piece 102 is coupled to the crimp 103. The upper end piece 102 can be completely or partially bonded to the crimp 103 by means of an adhesive, especially a recyclable adhesive or bonding agent. Alternatively, the upper end piece 102 can also be fastened to the crimp 103 by pressure fitting.

[0050] The upper end piece 102 can be made of multi-layered cardboard. The sleeve 101 can be made of spirally wound paper, cardboard, thick paper, thin wood veneer, or other thin-walled materials that can be processed according to the instructions.

[0051] A reinforcing element 106 is directly disposed on the second opening 104, which causes reinforcement, increased strength, and improved shape stability of the sleeve 101. Other embodiments of the reinforcing element 106 are described in... Figures 3 to 5 The details are shown in Figure B. The reinforcing element 106 is a structure extending into the interior of the sleeve 101, specifically a circumferential flange. Here, the reinforcing element 106 extends not only radially inward (RR), preferably by 1% to 10% of the width c of the sleeve 101, but also longitudinally inward (LR), preferably by 5% to 20% of the length a of the sleeve 101, and thus exists in a region corresponding to the cylindrical volume of the sleeve 101. Figure 1In the embodiment shown, the diameter of the cap 100 is larger in the region where the reinforcing element 106 is located on the inner surface 108 of the sleeve 101. This also ensures a secure, non-slip fit onto compatible cans, particularly aerosol cans. Within this region, the width d of the sleeve 101 in the second opening 104 is greater than the width e of the second opening 104, wherein the width c of the sleeve 101 in the first opening 105 is between width d and width e. Here, the widening of the cap is 0.5% to 2% of the width c of the sleeve 101 in the first opening 105.

[0052] Figure 2 Showing according to Figure 1 A side view of a sleeve 100 according to an embodiment of the invention. The cover 100 has a length direction LR and a radial direction RR, wherein the radial direction RR is orthogonal to the length direction LR. The length direction LR is... Figure 2 It extends along the central axis.

[0053] Figure 3 A cross-sectional view of detail figure B shows an embodiment of the reinforcing element 106 according to the invention. The reinforcing element 301 has a thickened region A. The thickened region A extends into the interior of the sleeve 101. The thickened region A is provided into the interior of the sleeve 101 by means of curling or folding the end region, which is directly disposed on the opening of the sleeve 101 and has the cut edge of the sleeve 101. In addition to curling the end region into the interior of the sleeve 101, the curled end region is also compressed in the radial direction RR. Here, the compression of the curled end region is achieved by applying pressure outward in the radial direction RR. Furthermore, the compression can be provided by means of a combination of thermal compaction and mechanical compaction with a backing plate, i.e., so-called "thermo-mechanical compaction".

[0054] Figure 4 Figure B shows a cross-sectional view of another embodiment of the reinforcing element 106 of the cover 100 according to the invention. The reinforcing element 401 has a thickened region A. The thickened region A extends into the interior of the sleeve 101. This can be achieved by targeted application of adhesive using an adhesive nozzle. Furthermore, the thickened region A can extend not only into the interior of the sleeve but also outwards. The thickened region A is provided by applying an adhesive, particularly a recyclable adhesive, which extends into the interior of the sleeve 101. Here, the recyclable adhesive is an easily regenerable adhesive.

[0055] Figure 5A cross-sectional view, detail Figure B, shows another embodiment of the reinforcing element 106 of the cap 100 according to the invention. The reinforcing element 501 has a region A on the second opening 104 of the sleeve 101. Region A is provided by folding the outer layer 503 around the free end of the inner layer 502 into the interior of the sleeve 101. Here, the outer layer 503 at least partially covers the inner layer 502 on the inside, that is, the outer layer 503 completely covers the end region of the inner layer 502 of the sleeve 101. In this variation, the cap can be held between the cap and the aerosol can by a force that causes friction.

[0056] It should be noted that the term "having" does not exclude other elements, and "a" does not exclude a plurality. Elements described in connection with different embodiments may also be combined. It should also be noted that the reference numerals in the claims should not be construed as limiting the scope of the claims.

[0057] List of reference numerals

[0058] 100 caps

[0059] 101 Sleeve

[0060] 102 upper end piece

[0061] 103 rolled edges

[0062] 104 Second Opening

[0063] 105 First Opening

[0064] 106 Enhancement Components

[0065] 107 outer surface

[0066] 108 inner surface

[0067] 301 Enhanced Components

[0068] 401 Enhancement Component

[0069] 501 Enhancement Component

[0070] 502 inner layer

[0071] 503 outer layer

[0072] The length of sleeve

[0073] thickness / material dimensions of sleeve B

[0074] c is the width of the sleeve in the first opening.

[0075] d is the width of the sleeve in the second opening.

[0076] The width of the second opening

[0077] A thickened area

[0078] B Detail Images

[0079] LR length direction

[0080] RR radial direction.

Claims

1. A lid (100) for sealing a container, comprising: A spirally wound sleeve (101) includes a first opening (105) and a second opening (104). The first opening (105) and the second opening (104) are opposite to each other; Upper piece (102). The upper end piece (102) is configured to close the first opening (105) of the sleeve (101). The sleeve (101) is made of paper. The second opening (104) of the sleeve (101) has a reinforcing element (106), and The reinforcing element (106) is a structure that extends into the interior of the sleeve (101). The sleeve (101) includes at least one inner layer (502) and at least one outer layer (503) spirally wound together, and the reinforcing element (106) has a thickened region (A) on the second opening (104) of the sleeve (101), the thickened region (A) being provided by folding the outer layer (503) around the free end of the inner layer (502) into the interior of the sleeve (101), such that the outer layer (503) at least partially covers at least one of the inner layers (502) and completely covers the free end of the inner layer (502).

2. The cover (100) according to claim 1, wherein, The first opening (105) has a flange. The flange extends into the interior of the sleeve (101), and The upper end piece (102) is coupled to the portion of the flange that extends into the interior of the sleeve (101).

3. The cover (100) according to claim 1 or 2. in, The outer surface (107) and / or the inner surface (108) of the sleeve (101) are provided with a synthetic coating.

4. The cover (100) according to claim 1 or 2. in, The outer surface (107) and / or the inner surface (108) of the sleeve (101) are provided with a bio-based coating.

5. A method for manufacturing a lid (100) for sealing a container, comprising: A spiral wound sleeve (101) having a first opening (105) and a second opening (104). in, The first opening (105) and the second opening (104) are opposite to each other; An upper end piece (102) is provided such that the upper end piece (102) closes the first opening (105) of the sleeve (101). The sleeve (101) is made of paper. A reinforcing element (106) is provided on the second opening (104) of the sleeve (101). The reinforcing element (106) is a structure that extends into the interior of the sleeve (101). The sleeve (101) includes at least one inner layer (502) and at least one outer layer (503) spirally wound together, and the reinforcing element (106) has a thickened region (A) on the second opening (104) of the sleeve (101), the thickened region (A) being provided by folding the outer layer (503) around the free end of the inner layer (502) into the interior of the sleeve (101), such that the outer layer (503) at least partially covers at least one of the inner layers (502) and completely covers the free end of the inner layer (502).

6. The method according to claim 5, in, Setting the upper end piece (102) includes: The first opening (105) of the sleeve (101) is rolled at the edge. The upper piece (102) is conveyed, and The upper end piece (102) is coupled to the rolled edge (103) of the first opening (105), the rolled edge (103) extending into the interior of the sleeve (101).

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