Core plug based on fibrous materials and method for the production thereof

Abstract

The invention relates to a sleeve plug (2) for the suspended storage of goods rolled onto a winding core in packaging, wherein the plug consists of fibrous materials and less than 10% by weight of additives based on the dry sleeve plug. A further aspect of the invention is a method for producing a sleeve plug according to the invention, comprising the following steps: a) providing fibrous materials; b) dissolving the fibrous materials in water to form a fiber slurry; c) forming the fiber slurry into a sleeve plug using a forming tool; d) drying the formed sleeve plug.

Description

[0001] The present invention relates to a sleeve plug for the suspended storage of goods rolled onto a winding sleeve in a packaging and to a method for its manufacture.

[0002] Tube plugs, also called roll holders, are used to precisely fix rolled goods to a winding core for transport or storage. These rolled goods are highly sensitive, especially web-like substrates such as photographic paper, which must continue to meet the highest quality standards even after storage and transport. In particular, the integrity of the surfaces and especially the edges of the rolled goods must be ensured.

[0003] To protect the rolled goods from damage during transport and storage, the sleeve plug holds the rolled goods in a "floating" position, either horizontally or vertically, during transport. "Floating" means that the rolled goods have no contact with the packaging, such as the pallet or the outer carton lid.

[0004] To avoid damage to the winding cores, which can lead to damage to the rolled goods, suitable core plugs or roll holders should always be used to optimally protect the rolled goods during both internal and external transport and storage.

[0005] Known in the art, sleeve plugs are generally made of polyethylene or similar polymers. Sleeve plugs made of paper-polymer composites are also known as alternatives. Sleeve plugs made of polymer(s) or paper-polymer composites generally result in dimensionally stable products suitable for sealing winding tubes.

[0006] Sleeve plugs made from polymer(s) or paper fiber-polymer composites have the disadvantage that they cannot be recycled using conventional methods. Such sleeve plugs are therefore single-use materials and generally have to be incinerated, as composting them is also not possible. The paper fiber raw materials contained in sleeve plugs made from paper fiber-polymer composites are thus lost to the recycling loop.

[0007] In light of the prior art, the object of the present invention was to provide a sleeve plug for the suspended storage of goods rolled onto a winding sleeve, which has sufficient strength and dimensional stability, can be manufactured simply and cost-effectively, and can be reused in the context of conventional recycling.

[0008] This problem was solved by a sleeve plug for the suspended storage of goods rolled onto a winding tube in a packaging, which consists of fibrous material and less than 10 wt.% additives based on the dry sleeve plug.

[0009] Surprisingly, it was found that the sleeve plug according to the invention exhibits excellent strength and dimensional stability, even though it is essentially free of polymers or polymeric binders. Furthermore, the sleeve plug according to the invention can be completely recycled using conventional recycling methods.

[0010] The sleeve plug according to the invention consists of fibrous material and less than 10 wt. % additives based on the dry sleeve plug.

[0011] Fiber refers to the fibrous material obtained and processed during the production of paper, cardboard, and corrugated board. Fibers are usually obtained from wood through mechanical and / or chemical pulping processes. The most important component of fibers in papermaking is cellulose. A distinction is made between primary and secondary fibers. Primary fibers are obtained directly from plant material, while secondary fibers are produced from waste paper, used cardboard, and corrugated board.

[0012] Examples of primary fibers used include bleached hardwood kraft pulp (LBKP), bleached softwood kraft pulp (NBKP), bleached hardwood sulfite pulp (LBSP), or bleached softwood sulfite pulp (NBSP). Fibers from non-woody plants such as hemp, grass, straw, cup plant (Silphium perfoliatum), bamboo, bagasse, or similar materials can also be used as primary fibers. These primary fibers can also be used in combination.

[0013] According to a preferred embodiment of the invention, a mixture of primary and secondary fibers is used as the fiber material. Preferably, the mixture has a weight fraction of up to 50 wt.% primary fibers, particularly preferably up to 10 wt.% primary fibers, based on the total weight of the mixture of primary and secondary fibers.

[0014] According to a particularly preferred embodiment of the invention, only secondary fibers are used as fiber materials. These secondary fibers are typically obtained from recycling processes and originate, for example, from waste paper, used cardboard boxes and / or used corrugated board.

[0015] In contrast to sleeve plugs known from the prior art, the sleeve plug according to the invention essentially comprises no polymers or polymeric binders. "Essentially free" in this context preferably means that the sleeve plug contains at most 5% by weight, preferably at most 2.5% by weight, particularly preferably at most 1% by weight, and especially at most 0.5% by weight, polymers or polymeric binders, based on the total weight of the dry sleeve plug. This ensures the recyclability of the sleeve plug. On the one hand, the sleeve plugs according to the invention are classified in category PAP21 according to the German Packaging Act and can therefore be disposed of as waste paper; on the other hand, the sleeve plugs according to the invention can be reused within the framework of conventional paper recycling.

[0016] The sleeve plug according to the invention contains, in addition to fibrous materials, less than 10 wt.% additives, preferably less than 5 wt.%, particularly preferably less than 1 wt.%, based on the total weight of the dry sleeve plug.

[0017] The additives used can be those commonly known in the paper industry. These additives can be selected from sizing agents such as alkyl kentene dimers, fatty acids and / or fatty acid salts, epoxyd fatty acid amides, alkenyl or alkyl succinic anhydrides, wet-strength agents such as polyamine-polyamide-epichlorohydrin, dry-strength agents such as anionic, cationic, or amphoteric polyamides, optical brighteners, fillers, pigments, dyes, and / or defoamers. It is self-evident from the above list that polymers or polymeric binders are also included among the additives. However, the total amount of polymers or polymeric binders, based on the total weight of the dry sleeve plug as described above, is preferably limited to a maximum of 5% by weight, more preferably to a maximum of 2.5% by weight, more preferably to a maximum of 1% by weight, and more particularly to a maximum of 0.5% by weight.This means that the proportion of polymers or polymeric binders based on the total weight of the dry additives is preferably at most 50 wt.%, preferably at most 25 wt.%, particularly preferably at most 10 wt.%, and most preferably at most 5 wt.%.

[0018] Suitable fillers include, for example, kaolin, calcium carbonate in its natural forms such as limestone, marble, or dolomite, precipitated calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, talc, silica, aluminum oxide, and mixtures thereof. Calcium carbonate with a particle size distribution (d50) in which at least 50% of the particles are smaller than 10 µm, preferably at least 50% of the particles are smaller than 5 µm, is particularly suitable. In a particular embodiment of the invention, calcite with a particle size distribution in which approximately 50% of the particles have a particle size of less than 2 µm, preferably 50% of the particles have a particle size of less than 1 µm, is used.

[0019] According to a preferred embodiment of the sleeve plug according to the invention, it has at least one limiting region and at least one pin-like inner part projecting substantially orthogonally to the limiting region.

[0020] Preferably, the at least one pin-like inner part has an outer contour that is at least partially substantially circular and cylindrical. The at least one pin-like inner part can, for example, also be mandrel-shaped. The at least one pin-like inner part can preferably, and in particular substantially completely, be inserted into a winding sleeve to be closed. Preferably, the diameter of the substantially circular and cylindrical outer contour is somewhat larger than the inner diameter of the winding sleeve to be closed, so that the sleeve plug can be secured in the winding sleeve to be closed by means of an interference fit.

[0021] Preferably, the at least one cone-shaped inner part extends substantially axially to an extension direction of a winding sleeve, wherein the at least one limiting region extends substantially orthogonally to an extension direction of a shipping sleeve.

[0022] Preferably, at least one boundary area limits the interior of a winding sleeve to the outside and / or serves at least partially as a stop surface against an outer wall of a winding sleeve. This can, for example, prevent the sleeve plug from being inserted too far into a winding sleeve.

[0023] One embodiment is characterized in that the at least one pin-like inner part preferably has a plurality of chambers. By providing a plurality of chambers, stiffening structures can be created in a production-efficient manner, which can improve the dimensional stability of the sleeve plug. This allows the sleeve plug to be reliably arranged in a winding sleeve and provides it with additional dimensional stability. Preferably, the chambers extend orthogonally to the boundary region and thus in the direction of the pin-like inner part.

[0024] One embodiment is characterized by the fact that the outer circumference or outer contours of the at least one boundary area are round. Such an embodiment is particularly advantageous for the essentially vertical storage or stacking of winding sleeves, since such a sleeve plug is inexpensive to manufacture and easy to handle.

[0025] One embodiment is characterized in that the outer circumference of the at least one boundary region, or the outer contours of the at least one boundary region, is / are essentially angular, preferably essentially rectangular, and particularly preferably essentially square. Such an embodiment is particularly advantageous when winding sleeves are stored or stacked in a substantially horizontal manner, since the winding sleeves and their plugs can be prevented from rolling away by a corresponding design of the sleeve plug or its outer contours.

[0026] Preferably, the diameter of the at least one pin-shaped inner part depends on the respective inner diameter of the winding sleeve. For example, the at least one pin-shaped inner part has an outer diameter of substantially 2 inches (50.8 mm) or an outer diameter of substantially 3 inches (76.2 mm).

[0027] Preferably, the at least one boundary region is plate-shaped. In particular, the at least one boundary region has a significantly greater extent in substantially two directions, preferably in width and length, than in another direction, preferably in height. The aforementioned three directions of extent are preferably arranged orthogonally to each other, for example, corresponding to the xyz axes of a Cartesian coordinate system.

[0028] Preferably, the at least one boundary region is disk-shaped. Preferably, the at least one boundary region has a centrally arranged projection that corresponds to the at least one pin-like inner part.

[0029] A preferred embodiment is characterized in that the at least one pin-like inner part has an elliptical, and in particular a substantially circular, outer circumference. This allows the at least one sleeve plug to be reliably connected to a winding sleeve without damaging goods wound onto the winding sleeve, for example, strip-shaped carrier materials.

[0030] One embodiment is characterized in that each chamber of the at least one pin-like inner part is connected to at least one further chamber by means of at least one web. By providing the webs as stiffening structures, the rigidity of the sleeve plug can be improved.

[0031] Preferably, recesses are arranged between the chambers, extending essentially orthogonally to the at least one boundary region. These recesses can, for example, extend to the at least one boundary region. The recesses allow for clearly defined chambers of the at least one pin-like inner part, thereby improving the stiffness of the sleeve plug while simultaneously saving material.

[0032] For example, at least some of the chambers, particularly those arranged along the outer circumference of the conical inner part, can each have at least one bulge on their outer surface that runs essentially orthogonally to the at least one boundary region. This can enable further material reduction and also provide improved stiffness of the conical inner part.

[0033] In a further embodiment, the at least one boundary region has at least one receiving area, in particular a substantially circular one, with reduced wall thickness. This receiving area is at least partially bounded on its outer circumference by projections pointing towards the pin-shaped inner part. This allows the at least one sleeve plug to be reliably connected to the winding sleeve. In particular, the receiving area enables a positive fit with the at least one winding sleeve.

[0034] For example, the receiving area has an outer diameter of essentially three inches (76.2 mm). For example, at least one winding sleeve can have an outer diameter larger than the diameter of the receiving area, so that the winding sleeve and the sleeve plug can be joined by an interference fit.

[0035] Preferably, at least one receiving area has a plurality of recesses with a reduced wall thickness compared to the rest of the receiving area. This enables cost-effective manufacturing of the sleeve plug due to reduced material consumption.

[0036] For example, it has proven advantageous if the cone-shaped inner part has, in particular, five chambers distributed along the outer circumference of the cone-shaped inner part, each of which is connected by means of a web to a chamber located in the center of the cone-shaped inner part.

[0037] A further embodiment is characterized in that the outer wall of the at least one pin-like inner part has at least one substantially circumferential step. In this context, a substantially circumferential step means, in particular, that the outer wall of the pin-like inner part has a region with a smaller outer circumference / diameter and a region with a larger outer circumference / diameter. The region with the larger outer circumference / diameter is preferably arranged proximal to the at least one boundary region, and the region with the smaller outer circumference / diameter is preferably arranged distal to the at least one boundary region. This allows, in particular, a simplified arrangement of the at least one sleeve plug in at least one winding sleeve.For example, the area with the smaller outer circumference or the area with the larger outer circumference has an outer diameter of essentially two inches (50.8 mm) or essentially three inches (76.2 mm).

[0038] Another embodiment is characterized in that the chambers are separated from each other by struts, the struts preferably being provided in the form of substantially oval protrusions arranged between the chambers. This further improves the dimensional stability of the sleeve plug. For example, the protrusions extend along the entire underside of the at least one pin-like inner part. For example, two such protrusions are provided substantially orthogonally to each other, dividing the pin-like inner part into substantially four equally sized chambers.

[0039] A further object of the invention is a method for manufacturing the sleeve plug according to the invention, comprising the following steps: a) Providing fibrous materials; b) Dissolving the fibrous materials in water to form a slurry; c) Forming the slurry into a pod plug using a molding tool; d) Drying the formed pod plug.

[0040] According to step a) of the process according to the invention, fibrous materials are provided. The provisions stated above in connection with the sleeve plug according to the invention apply accordingly to the provided fibrous materials. Primary fibrous materials, secondary fibrous materials, or mixtures thereof can be used as fibrous materials. For example, bleached hardwood kraft pulp (LBKP), bleached softwood kraft pulp (NBKP), bleached hardwood sulfite pulp (LBSP), or bleached softwood sulfite pulp (NBSP) can be used as primary fibrous materials. Fibers from non-woody plants such as hemp, grass, straw, cup plant (Silphium perfoliatum), bamboo, bagasse, or similar plants can also be used as primary fibrous materials. These primary fibrous materials can also be used in mixtures. According to a preferred embodiment of the process according to the invention, a mixture of primary and secondary fibrous materials is used as fibrous materials.Preferably, the mixture has a weight fraction of up to 50 wt.% primary fibers, particularly preferably up to 10 wt.% primary fibers, based on the total weight of the mixture of primary and secondary fibers. According to a particularly preferred embodiment of the process according to the invention, only secondary fibers are used as fibers.

[0041] These secondary fiber materials are usually obtained from recycling processes and come, for example, from waste paper, used cardboard boxes and / or used paperboard.

[0042] The fibers provided in step a) of the process according to the invention are dissolved in water in step b) of the process according to the invention to obtain a fiber slurry. The weight fraction of the fibers in a mixture of fibers and water in step b) of the process according to the invention is preferably 0.1 to 10 wt.%, based on the total weight of fibers and water. It has proven particularly practical if the weight fraction of the fibers in a mixture of fibers and water is in the range of 0.5 to 7 wt.%, preferably 1 to 5 wt.%, based on the total weight of fibers and water, in order to obtain rapid dissolution of the fiber into a fiber slurry with a sufficiently low viscosity that can be readily processed further.

[0043] The fiber slurry may contain, in addition to the fibers, less than 10 wt.%, preferably less than 5 wt.%, and particularly preferably less than 1 wt.%, additives based on the total solids content in the fiber slurry. The total solids content in the fiber slurry is understood to be the total weight fraction of solids present in the fiber slurry. The fibers and any additives present in the fiber slurry are solids, while water is not a solid. The statements made above regarding the sleeve plug according to the invention apply accordingly to any additives that may be present in the fiber slurry. The additives may be provided together with the fiber in step a) of the process.The additives, if any, can also be added to the fiber slurry in step b) during the dissolution of the fibers in water, or added to the already produced fiber slurry after step b) and before step c) of the process according to the invention. It is understood that if several additives are added, they can be introduced into the process according to the invention together at the same time, i.e., in the same step, or separately at the different times mentioned, i.e., during or after the different steps mentioned.

[0044] In step c) of the inventive method, the fiber slurry is formed into a sleeve plug using a forming tool. For this purpose, the forming tool preferably immerses itself in the fiber slurry or the fiber slurry is injected into the forming tool. The forming preferably takes place by applying a vacuum to the forming tool, which draws the water out through sieve-like openings in the forming tool, while the different fibers of the fiber slurry accumulate on the defined surface of the forming tool. After completion of the forming process, the forming tool is removed.

[0045] The formed sleeve plug is dried in step d) of the method according to the invention. Drying of the formed sleeve plug can be carried out, for example, using a drying oven. During drying, the excess water still present in the formed sleeve plug, which was not removed during the forming process in the mold in step c), evaporates. It has proven particularly practical to increase the drying temperature from just over 100°C to up to 200°C.

[0046] The fibers of the fibrous material form physical cross-links with each other through their topography and surface properties using the method according to the invention. As a result, a sleeve plug produced by the method according to the invention exhibits the required strength and dimensional stability, even though it is essentially free of polymers or polymeric binders.

[0047] Finally, the invention also includes a sleeve plug manufactured according to the inventive method.

[0048] The invention is further explained below with reference to the exemplary embodiments and figures. These show: Fig. 1 shows a first embodiment of a sleeve plug in a perspective view; Fig. 2 shows the one in Fig. 1 The illustrated embodiment is shown in a side view; Fig. 3 the in Fig. 1 The illustrated embodiment is shown in a top view; Fig. 4 is a sectional view along the in Fig. 3 marked section line AA; Fig. 5 a second embodiment of a sleeve plug in a perspective view; Fig. 6 the in Fig. 5 illustrated embodiment in a side view; and Fig. 7 the in Fig. 5 Exemplary embodiment shown in a top view.

[0049] In the Figs. 1 to 4Figure 1 shows a first embodiment of a sleeve plug 2 in a perspective view. The sleeve plug 2 has a substantially plate-shaped boundary region 4 for delimiting the interior of a winding sleeve, and a pin-like inner part 6 projecting substantially orthogonally to the boundary region 4. The pin-like inner part 6 has a substantially circular cylindrical outer contour, so that it can advantageously be inserted into a winding sleeve.

[0050] The cone-shaped inner part 6 has a total of six chambers 8, five of which extend over the outer circumference of the cone-shaped inner part 6 and are connected to a centrally located chamber 8 by means of webs 10. The chambers 8 also extend orthogonally to the boundary region 4 and thus in the axial direction of a winding sleeve.

[0051] The outer perimeter or outer contours 12 of the boundary area 4 are essentially square in the present case, with the corners 14 of the boundary area having a small radius.

[0052] Between the chambers 8, recesses 16 are arranged that extend essentially orthogonally to the boundary area 4. Likewise, the chambers 8 arranged along the outer circumference of the cone-shaped inner part 6 have bulges 20 on their outer surface 18 that also extend orthogonally to the boundary area 4.

[0053] The boundary area 4 has a substantially circular receiving area 22, which has a reduced wall thickness compared to the rest of the boundary area 4. This receiving area 22 is partially bounded on its outer circumference by projections 24 pointing towards the pin-shaped inner part. The projections 24 also form the corners of the boundary area 4 or the sleeve plug 2. The receiving area 22 thus forms a receptacle in which part of a shipping tube can be arranged. The receiving area 22 has a plurality of recesses 26, which have a reduced wall thickness compared to the rest of the receiving area 22. In the Figs. 5 to 7A second embodiment of a sleeve plug 2 is shown in a perspective view. The sleeve plug 2 has a substantially disc-shaped boundary region 4 and a pin-like inner part 6 projecting substantially orthogonally to the boundary region 4. The pin-like inner part 6 has a total of four chambers 8 arranged along its outer circumference. Two struts 28 are provided between the chambers 8, the struts 28 being designed as substantially oval protrusions arranged between the chambers 8. The struts 28 extend orthogonally to each other over the entire width and length of the underside of the inner part 6.

[0054] The outer perimeter or outer contours 12 of the boundary area 4 are essentially circular in this case.

[0055] The circumferential outer wall 30 of the tenon-like inner part 6 has a substantially circumferential step 32. This is formed by a region 34 with a smaller outer circumference or outer diameter and a region 36 with a larger outer circumference or outer diameter. Examples Strength testing

[0056] To be suitable for use as a sleeve plug for winding tubes, it must pass the "vertical impact test" according to DIN EN 22248:1992 without the winding tube being destroyed or crushed, i.e., damaged. The vertical impact test is carried out under standard climate conditions at 23°C and 50% relative humidity.

[0057] The tested winding tube, sealed with a sleeve plug, is a cuboid-shaped package made of corrugated cardboard. The surfaces, corners, and edges of the corrugated cardboard are marked according to DIN EN 22206:1992, item 1-6. The drop height is 80 cm. The standard drop test cycle consists of seven drops from this height. A drop table with a rigid impact surface, conforming to DIN EN 22248:1992, is used as the testing device. After the standard drop test cycle, the winding tube is inspected for damage and deformation (core crush) using a calibrated tube test mandrel.

[0058] The winding sleeves sealed with the sleeve plugs according to the invention show no damage after carrying out the "vertical impact test" according to DIN EN 22 248 : 1992. Assessment of recyclability

[0059] The investigation is carried out according to the procedure described in project 530592 of the bifa Environmental Institute entitled "Recyclability of Packaging" for determining the recyclability of PPK packaging (paper, cardboard, carton), PPK composites and FKN (liquid carton) (bifa Environmental Institute (2019): Recyclability of Packaging. Specification of the Investigation Framework and Criteria Catalog. With the collaboration of Tschachtli S., Pitschke T., Kreibe S., Martin A. Published by INTERSEROH Dienstleistungs GmbH. Augsburg. Available online at: https: / / www.interseroh.de / fileadmin / Verpackungsoptimierung / 530592_Recyclingfaehigkeit_Bewertungskatalog_v6_3_Download.pdf, accessed on 30.03.2020).

[0060] For the purposes of this test method, recyclability is understood to mean the property of a used or usable product made of paper, cardboard or corrugated board to be processable in a waste paper processing plant that complies with recognized technical standards, such that the waste paper material produced allows for the trouble-free and cost-efficient production of a new paper containing waste paper of acceptable quality.

[0061] The criteria used to assess recyclability are: Fibreability: Mass fraction of components unsuitable for papermaking, i.e., non-paper product components and residues of undiluted fiber components. The determination of non-paper product components and fibreability is carried out according to PTS method PTS-RH 021 / 97, published by the Paper Technology Foundation. Unobstructed sheet formation, i.e., no sticky impurities or optical inhomogeneities, or cleanliness of the recycled mass fraction suitable for papermaking. Testing for sticky impurities and optical inhomogeneities is also carried out according to PTS method PTS-RH 021 / 97.

[0062] Packaging materials are classified as product category II (see method for determining recyclability PTS-RH 021 / 97, published by the Paper Technology Foundation (PTS)). This category includes waste paper that is primarily used for the production of packaging paper.

[0063] The quantitative assessment of a package's recyclability is carried out using a scoring model with points. The starting point for the assessment is the criteria for evaluating recyclability. Within the scoring model, a percentage weighting is predefined for each assessment criterion (see Table 1 below), which is independent of the individual packaging being considered.

[0064] The quantitative assessment of recyclability is carried out in the following steps: - Based on the aforementioned assessment criteria according to PTS-RH 021 / 97, the degree of fulfillment for each assessment criterion of the packaging under investigation can first be qualitatively assessed. - Based on the qualitative assessment of the fulfillment level of the packaging under investigation, a graded quantitative assessment (rating) is carried out for each assessment criterion, ranging from 20 (best rating - level 1) to 0 or KO (worst rating - level 5). The underlying scale is shown in Table 1 below. - By multiplying the criterion-specific rating of the packaging by the corresponding weighting for the respective criterion, an individual score is obtained for each criterion. - By summing all individual scores, the overall assessment of recyclability is obtained, with the following classification: Scoring points % share of lower limit of maximum score (20) Classification of recyclability ≥ 19 95% Very good < 19 and > 16 80% Good < 16 and > 13 65% Restricted < 13 and > 10 50% Significantly restricted < 10 < 50% Deficient Knockout rating in one criterion Not recyclable Further details on the method and the evaluation criteria can be found in the publications listed.

[0065] According to this method for assessing recyclability, the web-shaped carrier material according to the invention has at least 16 scoring points. Reference symbol list

[0066] 2 Sleeve plug 4 Limiting area 6 Pin-shaped inner part 8 Chamber of the pin-shaped inner part 10 Webs of the pin-shaped inner part 12 Outer contours of the limiting area 14 Corners of the limiting area 16 Recesses of the pin-shaped inner part 18 Outer side of the chamber 20 Bulge of the chamber 22 Receiving area of ​​the limiting area 24 Projection of the limiting area 26 Recesses of the receiving area 28 Struts of the pin-shaped inner part 30 Outer wall of the pin-shaped inner part 32 Circumferential step 34 Area with smaller outer circumference / outer diameter 36 Area with larger outer circumference / outer diameter Table 1 Scoring model for the quantitative assessment of recyclability criterion Scaling (rating in points) Level 1 Level 2 Level 3 Level 4 Level 5 Level 5 20 15 10 5 0 KO Level 1: Assigning the packaging to the tracking system Assignable to a recording system Intuitive consumer data collection system no problem assignable Intuitive consumer data collection system restricted assignable - Intuitive consumer data collection system difficult assignable Intuitive consumer data collection system not assignable Level 2: Sortability of mixed packaging (LVP) Minimum size Vp is of sufficient size (significantly > 20 mm) - - Vp is not of sufficient size (significantly <20 mm) - - Identifiability with KS, FKN, PPK composite, PPK, glass (surface properties) Detection of target material unrestricted possible or special case of flexible plastic Detection of target material restricted Detection of target material significantly restricted - Detection of target material not possible - Level 3: Suitability for material recovery and provision of secondary products High-quality recycling process The expected disposal route is high-quality material The expected processing method is mostly high-quality material The expected processing method is only partly high-quality material Expected utilization pathway of target material exclusive energetic or only in High-quality individual case material Detachable, non-usable parts Vp includes no separable, non-usable portions Vp includes low Shares (< 10 mass %) Vp includes significant Proportions (> 10% by mass and < 30% by mass) Vp includes significant Shares (> 30 mass %) - VP will complete separated from the target fraction Non-separable components or impurities n Vp carries no disruptive impurities Vp carries one or two different types of contamination low Contamination risk Vp carries three or more different types of contaminants low Contamination risk Vp carries one or two different types of contaminants. high Contamination risk Vp carries three (or more) different types of contaminants with high contamination risk Vp introduces disruptive impurities that the Recyclability exclude

Claims

1. Sleeve plugs for the suspended storage of goods rolled onto a winding sleeve in a package, characterized by that it consists of fibrous materials and less than 10 wt% additives based on the dry sleeve plug.

2. Sleeve plug according to claim 1, characterized by the fact that The fibers consist of a mixture of primary and secondary fibers.

3. Sleeve plug according to claim 1, characterized by the fact that the fiber materials consist of secondary fiber materials.

4. Sleeve plug according to one of claims 1 to 3, characterized by the fact that The additives are selected from sizing agents, wet-strength agents, dry-strength agents, optical brighteners, fillers, pigments, dyes and / or defoamers.

5. Sleeve plug according to any one of claims 1 to 4, characterized by the fact that this is free from polymers and / or polymeric binders.

6. Sleeve plug according to any one of claims 1 to 5, characterized by the fact thatThe sleeve plug has a recyclability of at least 16 scoring points, determined according to the procedure described in the project with the number 530592 of the bifa Environmental Institute with the project title "Recyclability of packaging".

7. Sleeve plug according to any one of claims 1 to 6, characterized by the fact that The winding sleeve shows no damage during a "vertical shock test" according to DIN EN 22 248 : 1992.

8. Sleeve plugs according to any one of claims 1 to 7, characterized by the fact that the sleeve plug (2) has at least a limiting region (4) and at least one cone-shaped inner part (6) projecting substantially orthogonally to the limiting region (4), such that the at least one cone-shaped inner part (6) has a plurality of chambers (8).

9. Sleeve plug according to claim 8, characterized by that each chamber (8) is connected to at least one further chamber (8) by means of at least one bridge (10), thatpreferably recesses (16) are arranged between the chambers (8) which are essentially orthogonal to the at least one boundary area (4).

10. Sleeve plug according to claim 8 or 9, characterized by that that the outer wall (30) of the at least one cone-shaped inner part (6) has at least one substantially circumferential step (32), that the chambers (8) are each separated from each other by struts (28), the struts (28) preferably being provided in the form of substantially oval protrusions arranged between the chambers (8).

11. A method for producing a sleeve plug according to any one of claims 1 to 10, comprising the following steps: a) providing fibrous materials; b) dissolving the fibrous materials in water to form a slurry; c) forming the slurry into a sleeve plug using a forming tool; d) drying the formed sleeve plug.

12. Method according to claim 11, characterized by the fact that The forming process in step c) is carried out by applying a vacuum to the forming tool, which sucks the water out through sieve-shaped openings in the forming tool, while the different fibers of the fiber slurry accumulate on the defined shaped surface of the forming tool.

13. Method according to claim 11 or 12, characterized by the fact that that the fibers provided in step a) are a mixture of primary and secondary fibers or that the fibers provided in step a) are secondary fibers.

14. Method according to claims 11 to 13, characterized by the fact that The fiber slurry is free of polymers and / or polymeric binders.

15. Sleeve plug according to any one of claims 1 to 10, manufactured according to a method according to any one of claims 11 to 14.

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