Method for producing an insulating packaging, insulating packaging, plant for producing an insulating packaging, packaging box

Abstract

The invention relates to a method for producing an insulating packaging (10), comprising the steps of: providing cellulose fibres (24); portioning the cellulose fibres (24) to form a cellulose fibre bundle (26) with cellulose fibres (24); loosening the cellulose fibre bundle (26); introducing the cellulose fibres (24) of the cellulose fibre bundle (26) into a sheathing material (12); full-area compressing of the cellulose fibres (24) of the cellulose fibre bundle within the sheathing material (12) in order to form a fibre carpet (16); sealing the sheathing material (12) to form a closed bag (62); and action of pressure on the closed bag (62) and the fibre carpet (16) arranged therein in order to homogenize a distribution of fibres of the fibre carpet (16) in the closed bag (62). Furthermore, the invention relates to an insulating packaging, to a plant for producing an insulating packaging, and to a packaging box.

Description

[0001] Method for producing an insulating packaging, insulating packaging, plant for producing an insulating packaging, packaging box

[0002] The invention relates to a method for producing an insulating packaging, an insulating packaging, a plant for producing an insulating packaging and a packaging box with an insulating packaging.

[0003] State-of-the-art insulated packaging made of expanded polystyrene (EPS) enables mobile product cooling. The products to be cooled are placed in a container, usually a square EPS box, along with a cooling medium, such as ice packs or dry ice, and sealed with a removable EPS lid. Depending on the performance of the cooling medium, the products can be cooled for several hours or even up to several days, for example, two days. The EPS box with the lid closed can be placed in a shipping carton and shipped.

[0004] In many cases, when shipping refrigerated products such as food or medicine, the insulated packaging is disposed of after use. For environmental reasons, a recycling process for the insulated packaging is preferred. There are no established recycling processes for EPS materials, especially for private households. Furthermore, EPS is a mineral material, so its recycling requires an energy-intensive process. Consequently, the use of EPS as insulated packaging is associated with high manufacturing and recycling costs.

[0005] Based on the prior art, the object of the invention is to enable the production and use of an insulating packaging with a high degree of efficiency and effectiveness.

[0006] This object is achieved according to the invention by the subject matter of the independent claims. Further developments can be found in the dependent claims.

[0007] A method for producing an insulating packaging is specified, comprising the following steps: providing cellulose fibers; portioning the cellulose fibers to form a cellulose fiber bundle with cellulose fibers; loosening the cellulose fiber bundle; introducing the cellulose fibers of the cellulose fiber bundle into a wrapping material; compressing the cellulose fibers of the cellulose fiber bundle over a large area within the wrapping material to form a fiber carpet (16); sealing the wrapping material to form a sealed bag; and applying pressure to the sealed bag and the fiber carpet arranged therein to homogenize a distribution of fibers of the fiber carpet in the sealed bag.

[0008] The above process steps are preferably carried out in the order listed.

[0009] The use of cellulose fibers is advantageous from an ecological perspective, as they can be obtained from recyclable materials such as waste paper. Consequently, CO2 consumption is significantly reduced compared to the use of EPS. Furthermore, the use of cellulose fibers enables energy-efficient production, with energy consumption reduced by 5 to 10% compared to the production of conventional EPS insulation packaging, for example. Recycling materials made from cellulose fibers is also very easy. It can be disposed of like waste paper, for which established recycling processes exist for both private households and industrial applications.

[0010] The cellulose fibers provide the desired insulating effect. To achieve this, they preferably have a low thermal conductivity, for example, 36 mW / m*K (lambda). This thermal conductivity is superior in terms of its insulating effect compared to conventional blown-in insulation materials, which have a thermal conductivity of 40 mW / m*K (lambda), and is almost as high as the thermal conductivity of EPS.

[0011] Particularly low thermal conductivity of cellulose fibers can be achieved when the fibers are short and thin. Shorter and thinner fibers can be more flexible and thus form more homogeneous cellulose materials with a uniform pore size distribution. In longer fibers, the air inclusions can be more irregular, which can lead to an inhomogeneous density distribution and a fluctuating mass distribution in the longitudinal and transverse directions. This can create thermal bridges that lead to an increase in thermal conductivity. Furthermore, it has been shown that low fiber fibrillation – fibrils are fine hairs on the fiber surface that point into the open space and can come into contact with other fibers – can be beneficial for the insulating properties of cellulose fibers.Fibrils can act as spacers between the fibers and thus support the formation of a fine-pored structure with a high air volume inclusion.

[0012] In some embodiments, the cellulose fibers are provided by shredding comminuted cellulose materials comprising cellulose fibers. Preferably, shredded cellulose materials are obtained by shredding cellulose materials.

[0013] Cellulose material can include paper, cardboard, waste paper, and newspapers. Cellulose material also includes all materials that consist primarily of cellulose fibers. For example, recycled waste paper B12 can be used. Waste paper or mixed paper B12 consists of newspapers, cardboard, and writing paper, and preferably contains a maximum of 40% newspapers or magazines.

[0014] The extracted air, which can also be referred to as residual air, includes, for example, suspended matter and dust particles contained in the air, e.g. fine dust, and individual loose cellulose fibers.

[0015] The cellulose pulp can be shredded using a single-shaft shredder. Shredded cellulose pulp includes, for example, paper shreds and cardboard shreds. The shredded cellulose pulp can be stored in a silo. Using a cyclone mill, the shredded cellulose pulp can be defibred into cellulose fibers. Cellulose fibers can be transported by an air stream or a conveyor belt. A cyclone separator can be used to remove residual air from the cellulose fibers. This allows the cellulose fibers to be compressed. Residual air can be cleaned using a filter tower.

[0016] A measured quantity of cellulose fibers that are loosely connected to one another can form the cellulose fiber bundle. The loosening of the cellulose fiber bundle can take place at at least two different positions that are spatially separated from one another in a transport direction of the cellulose fiber bundle. Preferably, the loosening of the cellulose fiber bundle takes place by means of at least one rotating loosening rotor. The rotating loosening rotor can be electrically driven. The cellulose fiber bundle can rest on the rotating loosening rotor due to gravity. Preferably, at least two loosening rotors are provided. The loosening rotor can comprise a rotating shaft or be designed as such.

[0017] The cellulose fiber bundle can form a fiber web before its cellulose fibers enter the feed unit. Air can be removed during the introduction of the cellulose fibers of the cellulose fiber bundle into the feed unit and / or in the feed unit. For later use of the fiber carpet as insulating packaging, it is formed by introducing the cellulose fibers of the cellulose fiber bundle into the wrapping material and compacting them. In other words, the fiber carpet is produced by compacting the cellulose fibers. The wrapping material preferably comprises a plastic-coated paper layer and / or a plastic material. The use of a paper layer simplifies the recycling of the insulating packaging and improves its ecological balance. Plastic is more easily deformable than paper and can be made with a very thin material thickness.

[0018] The wrapping material preferably completely surrounds the fiber carpet. The wrapping material preferably has a bag shape with three closed sides and a filling opening when the cellulose fibers are introduced and / or when the fiber carpet is formed.

[0019] In some embodiments, the surface compaction of the fiber carpet within the wrapping material is carried out by means of a compaction unit comprising at least two pressure units movable relative to one another. One pressure unit is preferably configured to exert pressure on the wrapping material and the fiber carpet accommodated therein in such a way that air, e.g., residual air, escapes from the fiber carpet and the wrapping material. At least one of the pressure units can be stationary, while the other pressure unit can move toward it. Both pressure units can be arranged vertically relative to one another.

[0020] Furthermore, the compaction unit can comprise at least one circulating pressure belt, the distance of which to an opposite surface can be changed so that air escapes from the wrapping material as the distance decreases. The opposite surface can be formed by the second pressure unit. The pressure belt and the opposite surface can be arranged vertically. The opposite surface or the second pressure unit can comprise a further circulating pressure belt. The at least one pressure belt ensures an even distribution of the fiber carpet within the wrapping material. The at least one pressure belt comprises, for example, a circulating belt, i.e. a belt guided over two circulating rollers so that the wrapping material moves in the transport direction due to the movement of the pressure belt.

[0021] Preferably, the wrapping material is completely sealed after compacting the fiber carpet, meaning that no air can enter or escape from the wrapping material. The wrapping material bag is therefore preferably hermetically sealed.

[0022] To ensure that the wrapping material is securely closed, it can be advantageous to vacuum dust particles from a filling opening of the wrapping material before sealing it into a closed bag.

[0023] Generally, extraction channels can be provided to extract dust particles. Such extraction channels can prevent individual cellulose fibers and / or dust particles from being present in the area of ​​the sealing surface. Furthermore, compressed air can be applied to the sealing surface to obtain a clean surface for sealing. Consequently, the sealing process is improved and a tight seal of the wrapping material is ensured.

[0024] The insulating packaging produced by the above process preferably has a thickness of 20 to 25 mm with a standard basis weight between 800 and 1350 g / m 2 , preferably between 1200 and 1300 g / m 2 , more preferably 1250 g / m 2 . In another embodiment, the insulating packaging produced by the above method may preferably have a thickness of 25 to 35 mm with a standard basis weight of between 1700 and 2000 g / m2 , preferably between 1750 and 1850 g / m 2 , more preferably 1800 g / m 2 Generally speaking, the insulating packaging can have a standard basis weight of at least 800 g / m 2 , at least 1000 g / m 2 or at least 1200 g / m 2 and / or a standard basis weight of maximum 2000 g / m 2 , maximum 1800 g / m 2 or a maximum of 1600 g / m 2 The wrapping material with the fiber carpet contained therein, i.e., the insulating packaging, can also be further processed into an insulating bag. Preferably, the step of applying pressure to the sealed bag is followed by a further step. In this step, the sealed bag is preferably folded and / or creased and / or turned over and glued in such a way that it forms a bag surrounded by the fiber carpet.

[0025] According to a further aspect of the invention, the above object is achieved by an insulating packaging comprising a wrapping material comprising a plastic-coated paper layer which forms a closed bag by forming at least one sealing section, and a filling comprising a fiber carpet made of cellulose fibers, wherein the fiber carpet has a continuous length of more than 60 cm, preferably more than 70 cm, more preferably more than 80 cm, and a continuous width of more than 20 cm, preferably more than 30 cm, more preferably 40 cm or more. The insulating packaging is preferably produced using a method according to the first aspect of the invention.

[0026] In one possible embodiment, at least one of the width and the length of the continuous fiber carpet is at least 60 cm long. Furthermore, the width of the fiber carpet in one embodiment can be between 55 and 65 cm, preferably 60 cm. Furthermore, the length of the fiber carpet can be between 30 and 200 cm or more than 200 cm. Larger dimensions of the fiber carpet make it possible to use the insulating packaging with few or no thermal bridges. If the fiber carpet is inserted into a shipping carton, for example, its length can be guided around edges or corners and cover them without a thermal bridge. An example of using the insulating packaging in a packaging box will be described in more detail later.

[0027] The wrapping material can, for example, form a completely sealed bag by means of sealing sections. One of the sealing sections can connect two opposite ends of the wrapping material to each other, creating a wrapping material tube with a circumferentially closed surface. Another sealing section can close the wrapping material tube to form an open bag. Another sealing section can close the bag, which is open at one end, to form a completely sealed bag. Furthermore, other sealing sections are conceivable, as long as a completely sealed bag is formed in which the fiber carpet can be accommodated. The bag is preferably hermetically sealed.

[0028] The fiber carpet is continuous. This means that the fiber carpet is preferably uninterrupted along its length and width. Furthermore, the wrapping material is preferably continuous. This means that the wrapping material preferably has no compartments and / or sealing seams, apart from the at least one sealing section that seals the wrapping material from the environment. In other words, the bag formed from the wrapping material comprises precisely one chamber for receiving the filling.

[0029] The paper layer can comprise kraft paper, which is preferably coated with a sealable plastic layer. The plastic layer is made of polyethylene, for example. Kraft paper is understood to be a type of paper that consists of more than 90%, preferably more than 95%, more preferably more than 98%, cellulose fibers. Starch, alum, and / or glue can be added to achieve surface effects and increase strength. The paper layer is preferably coated on one side with plastic, e.g., polyethylene (PE). The plastic coating can enable an airtight closure of the wrapping material. In addition, the paper layer can be made water-repellent thanks to the plastic coating.

[0030] In an environmentally friendly embodiment, the paper layer can comprise unbleached paper. Furthermore, the paper layer can be heat-sealable, making it particularly easy to process into a sealed bag with sealing sections. The paper layer preferably has a water vapor barrier that protects the filling from water absorption.

[0031] In one embodiment, the paper layer has a weight between 67 and 77 g / m 2 , preferably between 69 and 75 g / m 2 , more preferably between 71 and 73 g / m 2Furthermore, in one embodiment, the paper layer has a thickness between 92 and 102 μm, preferably between 94 and 100 μm, more preferably between 96 and 98 μm. The weight is preferably determined according to ISO 536. The thickness is preferably determined according to ISO 534. Furthermore, the paper layer can have a tensile strength MD of 5.4 kN / m (according to ISO 1924) and / or a tensile strength CD of 2.3 kN / m (according to ISO 1924). Furthermore, the paper layer can have a tear strength MD of 550 mN (according to ISO 1974) and / or a tear strength CD of 790 mN (according to ISO 1974). Furthermore, the paper layer can have a bursting strength of 370 kPa (according to ISO 2758). Furthermore, the paper layer can have an absorbency with a Cobb value of 32 g / m 3 (according to ISO 535). Furthermore, the paper layer can have a water vapor transmission rate (WVTR) of 3.2 g / (m 2*24h) (according to ASTM 1249). The above paper properties represent an optimal balance between low material usage, good processability of the paper layer, and the strength of the paper layer suitable for use as an insulating material.

[0032] According to a further aspect of the invention, the above object is achieved by a system for producing an insulating packaging. The system is preferably suitable for producing an insulating packaging having the features according to the above aspect. Furthermore, the system can be used, for example, to produce an insulating material produced according to the above method.

[0033] The insulating packaging comprises a portioning unit for portioning cellulose fibers into a cellulose fiber bundle. The portioning unit comprises a chamber for receiving a defined amount of cellulose fibers; a fiber loosening unit for loosening the cellulose fibers and / or the cellulose fiber bundle, wherein the fiber loosening unit is arranged in the chamber; a transport unit for transporting the cellulose fibers and / or the cellulose fiber bundle; and preferably a stripping device for stripping and compacting the cellulose fibers and / or the cellulose fiber bundle. The system further comprises a feed unit for feeding the cellulose fibers of the cellulose fiber bundle to a compaction area. The feed unit comprises at least one suction unit configured to extract air from the feed unit.The system further comprises a wrapping material feed device for feeding wrapping material, wherein the wrapping material feed device is configured to feed the wrapping material such that it envelops the cellulose fibers (24) fed to the compression area (45) by means of the feed unit. The system further comprises a compression unit for compressing the cellulose fibers enveloped in the wrapping material in the compression area to form a fiber carpet, comprising two pressure units movable relative to one another; a sealing unit for sealing the wrapping material to form a closed bag; and a fiber distribution unit for homogenizing a distribution of fibers of the fiber carpet in the wrapping material, which comprises at least one pressure-exerting element acting on the wrapping material of the bag and consequently on the fiber carpet. The system makes it possible to produce a fiber carpet that has good thermal conductivity of approximatelyIt has a thermal conductivity of 36 mW / m*K, making it particularly well-suited for use as an insulating material, for example. Furthermore, the system enables the production of insulated packaging suitable for cooling food, for example.

[0034] The system may further comprise a shredder for shredding cellulose; a storage container for storing shredded cellulose; and / or a fiberizing machine for shredding the shredded cellulose into cellulose fibers. In this way, the system can provide cellulose fibers for further processing. The shredder may comprise a single-shaft shredder. The storage container may comprise a silo. The fiberizing machine may comprise a cyclone mill. Furthermore, other technical configurations of the shredder, the storage container, and / or the fiberizing machine are possible.

[0035] In some embodiments, the system further comprises an air transport unit for transporting the cellulose fibers by means of an air stream. Furthermore, the system may comprise a separation unit for removing air and feeding the cellulose fibers into the portioning unit. The separation unit may comprise a cyclone separator. Furthermore, a residual air filter for cleaning the residual air may be provided at the separation unit. This prevents fine dust and / or individual cellulose fibers from being released into the environment.

[0036] To ensure a consistent amount of cellulose fibers per insulated packaging, the chamber of the portioning unit can include a fill level gauge for measuring the fill level of the cellulose fibers in the chamber. The fill level gauge can include a vibration sensor. Alternatively or additionally, the fill level gauge can include a rotary paddle switch as a fill level gauge. Based on the determined fill level of the cellulose fibers, the amount of cellulose fibers absorbed in the chamber can be calculated. For this purpose, the system includes, for example, a corresponding calculation unit.

[0037] The portioning unit may further comprise a shut-off element arranged within the chamber and configured to limit the height of the chamber at least in a defined area of ​​the chamber and / or to divide the chamber into two chamber sections. The shut-off element may be a gate valve or another element suitable for limiting the height of the chamber at least in a defined area of ​​the chamber and / or to divide the chamber into the two chamber sections.

[0038] The portioning unit may further comprise an additional fiber loosening unit arranged offset from the fiber loosening unit in the transport direction, wherein the additional fiber loosening unit is arranged in the chamber. The transport direction may be defined by the direction of movement and processing of the cellulose fibers.

[0039] The fiber loosening unit is preferably arranged upstream of the blocking element in the transport direction. The additional fiber loosening unit is preferably arranged downstream of the blocking element in the transport direction. The at least one fiber loosening unit ensures that the cellulose fibers are further processed as homogeneously distributed fibers.

[0040] The stripping device can comprise a height-adjustable paddle wheel, the paddles of which are preferably curved. In particular, the height of the cellulose fiber bundle can be reduced. The paddle wheel paddles preferably comprise curved metal sheets. The paddle wheel paddles contact or slide along a surface of the cellulose fiber bundle. Thus, excess cellulose fibers can be removed from the cellulose fiber bundle.

[0041] The portioning unit may further comprise a suction device for sucking air and suspended matter out of the chamber, preferably from both chamber sections.

[0042] The at least one suction unit of the feed unit can be arranged at an edge and / or a corner and / or a curve of the feed unit. The at least one suction unit can be configured to extract air and suspended matter during the feeding of the cellulose fibers of the cellulose fiber bundle through the feed unit.

[0043] The feed unit can comprise a vertical format tube, with at least one suction unit arranged in the format tube. For example, four suction units can be provided in the feed unit or the format tube, which are arranged at four edges and / or corners and / or curves of the feed unit or the format tube. The at least one suction unit can extend along the feed unit or the format tube, for example, over more than 30 cm, preferably more than 40 cm, more preferably more than 50 cm.

[0044] Once the cellulose fibers of the cellulose fiber bundle have passed through the format tube, they are surrounded by the wrapping material and arranged in the compaction area. The compaction unit ensures that the cellulose fibers are compressed to form a fiber carpet and that the fiber carpet has a uniform thickness. The compaction unit comprises, for example, at least one vertical pressure belt system that rotates in the transport direction and is designed to transport the surface of the wrapping material that rests against it in the transport direction. The wrapping material adheres, for example, to a pressure belt of the pressure belt system by means of static friction. The compaction unit can be designed to remove air from the wrapping material. The compaction unit can be used to evenly compact and distribute the fiber carpet in the wrapping material. This ensures that the fiber carpet does not fall below or exceed a predetermined thickness.

[0045] The sealing unit can be used to seal the wrapping material, for example, by heat sealing. The sealing unit can be arranged upstream of the compaction unit, i.e., opposite to the transport direction, and transverse to the transport direction of the wrapping material. The system can further comprise a compressed air supply unit, which is arranged adjacent to the sealing unit and is configured to deliver compressed air toward the sealing unit. The compressed air serves to remove any particles that may be present in the area of ​​the sealing unit.

[0046] For a particularly uniform distribution of the fiber carpet in the sealed wrapping material, the fiber carpet can be distributed in the wrapping material using the fiber distribution unit. For this purpose, the fiber distribution unit has at least one pressure-exerting element.

[0047] The at least one pressure-exerting element of the fiber distribution unit can be rotatably mounted, for example, on a rotatable shaft. The at least one pressure-exerting element can extend over a width of at least 20 cm, preferably at least 30 cm, more preferably at least 40 cm, and even more preferably up to 60 cm. The at least one pressure-exerting element can be made of plastic or at least coated or partially coated with plastic, so that only sections of the at least one pressure-exerting element that have a plastic surface act on the wrapping material. Additionally or alternatively, the at least one pressure-exerting element can comprise at least three pressure-exerting elements, preferably at least 6 pressure-exerting elements, more preferably at least 9 pressure-exerting elements. The pressure-exerting elements can be arranged next to one another transversely to the transport direction.

[0048] Preferably, the fiber distribution unit further comprises a transport unit configured to move the at least one pressure-exerting element and the bag relative to one another. The transport unit may be a rotating element, for example, comprising a plurality of edges, e.g., four edges.

[0049] The aforementioned devices and / or units can each comprise dedicated control units and / or controllers. Alternatively or additionally, at least one control unit and / or controller can be provided that controls at least two and / or more of the aforementioned devices and / or units. Furthermore, one or more control units and / or controllers can be arranged hierarchically, so that, for example, one control unit and / or controller controls multiple control units and / or controllers in order to control the functions of multiple devices and / or units. The system preferably comprises a control unit for controlling all of the units and / or devices and / or elements and / or controllers and / or control units comprised thereby.

[0050] The wrapping material feed device may comprise a forming shoulder for forming a wrapping material enclosed by at least two sides, wherein the forming shoulder comprises the at least one suction unit.

[0051] Overall, the system can comprise vertically arranged elements / units / devices and can therefore be referred to as a vertical packaging system. The cellulose fibers can be fed into the portioning unit by gravity, meaning the cellulose fibers fall into the portioning unit's chamber due to their own weight. Alternatively or additionally, the cellulose fibers can be fed into a filling opening of the feed unit, e.g., into the formatting tube, by gravity.

[0052] For example, the feed unit can also be arranged vertically, so that the cellulose fibers move in the transport direction within the feed unit due to gravity. Alternatively or additionally, the printing unit can comprise a vertically arranged printing belt.

[0053] According to a further aspect of the invention, the above object is achieved by a packaging box. The packaging box comprises an insulated packaging, preferably according to one of the preceding aspects of the invention and / or preferably produced by a method according to one of the preceding aspects of the invention and / or by means of a system according to one of the preceding aspects of the invention. The insulated packaging comprises a wrapping material which forms a completely sealed bag by means of at least one sealing section, and a filling which comprises a fiber carpet made of cellulose fibers, wherein the fiber carpet has a continuous length of more than 60 cm, preferably more than 70 cm, more preferably more than 80 cm, and a continuous width of more than 20 cm, preferably more than 30 cm, more preferably 40 cm or more.Furthermore, the fiber carpet can have a continuous length of more than 100 cm, preferably more than 150 cm, more preferably more than 180 cm, even more preferably 200 cm or more. Furthermore, the fiber carpet can have a continuous width of more than 50 cm, preferably 60 cm or more.

[0054] The packaging box further comprises an outer shell comprising six shell surfaces and twelve edges, which is designed to completely enclose a cuboid-shaped inner chamber, and an insert element which is designed to receive the insulating packaging and to be inserted into the inner chamber together with the insulating packaging in such a way that the insert element covers at least a large part of three inner shell surfaces and two edges of the inner chamber, wherein the insert element is foldable and / or bendable in two sections, and wherein the fiber carpet of the insulating packaging covers a large part of the foldable and / or bendable sections of the insert element.

[0055] A majority is understood to mean a proportion of more than 90%, preferably more than 95%, more preferably more than 98%.

[0056] The packaging box can comprise an additional insert element. The additional insert element can be arranged such that it largely covers three additional inner surfaces and two additional edges of the inner chamber. Thus, using two insert elements, all six inner surfaces of a cuboid inner chamber can be largely covered. The two insert elements can abut one another along eight edges or at least be arranged adjacent to one another.

[0057] The fiber carpet can be designed to be foldable and / or bendable, with the fiber carpet being continuous in its folded and / or bent sections. A continuous design means that the fiber carpet runs continuously in its folded and / or bent sections, i.e., a fiber composite of the fiber carpet made of cellulose fibers remains intact. This means that the fiber carpet preferably also exhibits its insulating function in the folded and / or bent sections.

[0058] For example, a folded and / or bent portion of the continuous fiber carpet is arranged adjacent to one of the edges of the inner chamber and / or covers at least a large part of it.

[0059] The present invention is described below by way of example with reference to the accompanying figures. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will expediently consider the features individually and use them in meaningful combination within the scope of the claims.

[0060] If there is more than one instance of a particular object, only one of them may be provided with a reference symbol in the figures and in the description. The description of this instance can be transferred accordingly to the other instances of the object. If objects are named using numerical terms, such as first, second, third object, etc., these serve to name and / or assign objects. Accordingly, for example, a first object and a third object, but not a second object, may be included. However, a number and / or sequence of objects could also be derived using numerical terms.

[0061] They show:

[0062] Fig. 1 shows a schematic view of an insulating packaging;

[0063] Fig. 2a-c show cellulose fibers, a cellulose fiber bundle, and a fiber carpet; Fig. 3 shows a schematic view of a portioning unit of a packaging system;

[0064] Fig. 4 shows a schematic representation of a packaging system;

[0065] Fig. 5 shows an exemplary design of a format tube of a

[0066] Packaging plant in a schematic representation;

[0067] Fig. 6 shows an exemplary embodiment of a section of a packaging system in a schematic representation;

[0068] Fig. 7 shows a schematic representation of a compression unit of a packaging plant;

[0069] Fig. 8a-b shows a schematic representation of a fiber distribution unit of a packaging plant;

[0070] Fig. 9 shows an insulating bag;

[0071] Fig. 10 shows a schematic representation of a plant for producing an insulating bag from an insulating packaging;

[0072] Fig. 1 1 shows a flow diagram of a process for producing an insulating packaging; and

[0073] Fig. 12a-b show a packaging box and an insert element accommodated therein in individual view.

[0074] An insulating packaging 10 is shown schematically in Figure 1. The insulating packaging 10 comprises a wrapping material 12, which is formed into a sealed bag by means of at least one longitudinal seam 14 and at least two transverse seams 15. The seams are shown in Figure 1 as thick dashed lines. The longitudinal seam 14 runs in the longitudinal direction and connects the wrapping material 12 to form a tube, which is closed at two opposite ends by means of the two transverse seams. In the illustrated embodiment, the wrapping material 12 is a plastic-coated paper layer coated with a plastic layer made of polyethylene and is heat-sealable, or a heat-sealable plastic layer. Located within the wrapping material 12 is a filling comprising a fiber carpet 16 made of cellulose fibers. The fiber carpet 16 is indicated by dashed lines in Figure 1 and is completely surrounded by the wrapping material 12.A continuous length 18 of the fiber carpet 16 is more than 60 cm, preferably more than 70 cm, more preferably more than 80 cm. A continuous width 20 of the fiber carpet 16 is more than 20 cm, preferably more than 30 cm, more preferably 40 cm or more. Furthermore, the fiber carpet 16 can have a continuous length 18 of more than 100 cm, preferably more than 150 cm, more preferably more than 180 cm, even more preferably 200 cm or more. Furthermore, the fiber carpet 16 can have a continuous width 20 of more than 50 cm, preferably 60 cm or more.

[0075] In the following, a system for producing an insulating packaging, for example the insulating packaging 10, is explained using an embodiment with reference to Figures 3 to 9.

[0076] The system for producing the insulating packaging 10 comprises a portioning unit 22, shown in Figure 3, for portioning cellulose fibers 24 into a cellulose fiber bundle 26. Cellulose fibers 24 are shown schematically in Figure 2a. These can be obtained by shredding cellulose materials, such as paper, and defibrating the reduced cellulose material. If the cellulose fibers 24 are portioned, the cellulose fiber bundle 26 shown schematically in Figure 2b is formed.

[0077] To form the cellulose fiber bundle 26, the portioning unit 22 comprises a chamber 28 configured to hold a defined amount of cellulose fibers 24. A fill level gauge arranged in the chamber 28 detects the amount of cellulose fibers 24 held in the chamber 28.

[0078] A fiber loosening unit 30 arranged in the chamber 28 serves to loosen the cellulose fibers 24 accommodated in the chamber 28, for example to compensate for local density differences of the cellulose fibers 24 and to prevent bridging of the cellulose fibers, which could lead to blockages. In the illustrated embodiment, a second fiber loosening unit 32 is also arranged in the chamber 28. The chamber 28 is divided into a first chamber section 29 and a second chamber section 34, with the second chamber section 34 adjoining the first chamber section 29 in the transport direction 36. The first fiber loosening unit 30 is provided in the first chamber section 29 and the second fiber loosening unit 32 is provided in the second chamber section 34.The cellulose fibers 24 are transported within and out of the chamber 28 by means of a transport unit 38, which is depicted in Figure 3 as a circulating conveyor belt. The transport unit 38 is configured to enable transport in the transport direction 36.

[0079] In the illustrated embodiment, the chamber sections 29, 34 can be separated from one another by a height-adjustable shut-off element 40. The shut-off element 40 is depicted as a height-adjustable sliding element in the illustrated embodiment. The shut-off element 40 can be configured to separate the chamber sections 29, 34 in such a way that cellulose fibers 24 present in the first chamber section 29 are prevented from passing into the second chamber section 34.

[0080] In the chamber 28, for example, the second chamber section 34, a stripping device 37 is provided for stripping the cellulose fiber bundle 26. The stripping device 37 is depicted as a height-adjustable rotating element with rotating blades 39. The blades 39 are configured to contact the surface of the cellulose fiber bundle 26 and to scrape along it. This results in the removal of individual loose cellulose fibers. A suction device 42 arranged in the chamber 28 is configured to suction the loose cellulose fibers and / or air together with dust particles and suspended matter from the chamber 28.

[0081] Adjacent to the portioning unit 22 in the transport direction 36 is a feed unit 44, which can be seen in Figure 4 and is arranged vertically below the portioning unit 22. The cellulose fiber bundle 26 is conveyed out of the portioning unit 22 by means of the transport unit 38 and moves into the feed unit 44 due to gravity. In the present case, the cellulose fibers 24 of the cellulose fiber bundle 26 are first formed into a fiber web 17 on the transport unit 38. The fibers of the fiber web 17 then fall into the feed unit 44. To remove air within the feed unit 44, a suction unit 46 is provided within the feed unit 44.

[0082] Figure 5 shows a top view of a format tube 48 of the feed unit 44 with suction units 46 arranged therein. In the illustrated embodiment, four suction units 46 are arranged at four corners of the format tube 48. However, fewer or more suction units 46 can also be provided. Furthermore, these can also be arranged at other positions in the format tube 48, for example, at any position on an inner casing of the format tube 48.

[0083] Figure 6 shows a wrapping material feed device 50 for feeding the wrapping material 12. The wrapping material feed device 50 comprises a receptacle 52 for wrapping material 12 and a forming shoulder 54 for forming the wrapping material 12. The wrapping material 12 is fed as a roll in strip form and is formed by the forming shoulder 54 such that it encloses the format tube 48. The wrapping material 12 is sealed along opposite ends (longitudinal seam), creating an open tube. A longitudinal sealing device 56 provided for sealing is indicated in Figure 6. The tube of wrapping material 12 is closed by means of a transverse seam 15 and forms a bag with a filling opening. The end of the wrapping material 12 is closed from a tube to a bag by means of a transverse sealing device 58, the positioning of which can be seen in Figures 4 and 7.

[0084] The cellulose fibers 24 of the cellulose fiber bundle 26 are received through the filling opening in the bag of wrapping material 12 and are completely surrounded by it. The cellulose fibers fall due to gravity through the format tube 48 into the empty, open bag of wrapping material 12. The cellulose fibers 24 received in the bag of wrapping material 12 are fed in the transport direction 36 to a compaction unit 60. A schematic view of the compaction unit 60 is shown in Figure 7.

[0085] In the compaction unit 60, the cellulose fibers 24 in the bag of wrapping material 12 are compacted to form a fiber carpet 16 (see Fig. 2c) before the bag's filling opening is closed and a sealed bag 62 is formed. In the illustrated embodiment, the compaction unit 60 comprises two pressure units 64, at least one of which is movable relative to the other. Furthermore, both pressure units 64 can be designed to be movable. The direction of movement is transverse to the longitudinal extent of the sealed bag 62 and is illustrated in Figure 7 by the arrows 66. The two pressure units 64 form a pressure belt system 65.

[0086] The two printing units 64 are designed to print on the bag in such a way

[0087] Wrapping material 12 and consequently the fiber carpet 16, allowing air to escape from the filling opening of the open bag of wrapping material 12. Thus, the fiber carpet 16 is compacted.

[0088] The transverse sealing device 58 arranged between the feed unit 44 and the compression unit 60 is designed to seal the filling opening of the bag of wrapping material 12 in such a way that the closed bag 62 of wrapping material 12 is formed.

[0089] The suction unit 46, for example, suction channels 46, in the format tube 48 and, if necessary, additional suction units are configured to clean a sealing plane for sealing the open bag of contaminants such as cellulose fibers and dust particles. To seal the wrapping material 12 of the bag, the sealing tools of the sealing device 58 are configured to move together and act on the wrapping material 12 from opposite sides. When the sealing tools move together, compressed air nozzles (not shown) can be activated to clean the sealing plane of cellulose fibers and dust particles.

[0090] In the embodiment shown in Figure 7, the pressure units 64 are designed as pressure belts that are movable around deflection rollers 68 in the circumferential direction 70. The pressure units 64 exert a compressive force from two opposite directions on the open bag and the fiber carpet 16 accommodated therein, whereby the fiber carpet 16 is evenly distributed within the bag. Furthermore, the movement of the pressure belts ensures that the bag 62 is transported in the transport direction 36.

[0091] A separating unit 72 is integrated into the transverse sealing device 58 and / or arranged overlapping therewith with respect to the transport direction 36. The combination of the transverse sealing device 58 and the separating unit 72 results in the formation of two transverse seams 15 and a severing between these transverse seams 15 at one location. A first of these transverse seams 15 forms a rear transverse seam 15 of a first bag transported further with respect to the transport direction 16, and a second of these transverse seams 15 forms a front transverse seam 15 of a second bag transported less far with respect to the transport direction 16. In other words, the transverse sealing device 58 is configured to produce two transverse seams 15 at once, which are assigned to two bags 62 produced directly one after the other. The separating unit 72 is configured to separate the wrapping material 12 in the region of a transverse sealing section of the wrapping material 12.The separation unit 72 may include a cutting blade for separating the wrapping material 12. As shown in Figure 4, the sealed and separated bag 62 can be picked up by a further transport unit 74 and transported further to a fiber distribution unit 76 (see Figures 8a-b).

[0092] The transverse seam 14 for closing the filling opening of the bag in which the fiber carpet 16 is accommodated can simultaneously be the transverse seam 14 which closes the tube of wrapping material 12 in order to form a further bag upstream of the transport direction 36.

[0093] The fiber distribution unit 76 is schematically illustrated in Figure 8a. It comprises at least one pressure-exerting element 78 acting on the sealed bag 62. The pressure-exerting element 78 rotates about a rotation axis 80 and, with each rotation, exerts pressure on the bag 62 and the fiber carpet 16 arranged therein. In this way, a homogeneous distribution of fibers of the fiber carpet 16 and a fiber carpet 16 with a homogeneous thickness 81 are achieved.

[0094] Figure 8b shows a plurality of pressure-exerting elements 78 arranged transversely to the transport direction 36, each of which is configured to rotate about the rotation axis 80. By using a plurality of pressure-exerting elements 78, an even more uniform distribution of the fiber carpet 16 in the bag 62 can be achieved.

[0095] To transport the sealed bag 62 in the transport direction 36 within the fiber distribution unit 76, at least one motor-driven rotating shaft 82 is provided above a fixed base 84. The bag 62 is movable between the fixed base 84 and the shaft 82. In the present case, the fixed base 84 is part of a conveyor belt. Furthermore, a rotating element 88 rotating about its longitudinal axis 86 is provided for securing the bag 62. In the illustrated embodiment, the rotating element 88 has a square cross-section. However, other cross-sections are also conceivable, for example any polygonal cross-section, as long as this allows the bag 62 to be secured.In the illustrated embodiment, the fiber distribution unit 76 comprises two motor-driven rotating shafts 82, 90, one of which is arranged upstream of the pressure-exerting element 78 in the transport direction 36 and the other downstream of the rotating element 88. The transport speed of the bag 62 in the transport direction 36 is adjusted such that the pressure-exerting elements 78 act on a large portion of the bag 62 or the fiber carpet 16 arranged therein. After the bag 62 has passed through the fiber distribution unit 76, the insulating packaging 10 is produced.

[0096] The wrapping material 12 with the fiber carpet 16 accommodated therein, i.e., the insulating packaging 10, can be further processed into an insulating bag 92 (see Figure 9). For this purpose, the insulating packaging 10 is folded and / or bent and / or turned over and glued in such a way that it forms an insulating bag 92 surrounded by the fiber carpet 16, wherein at least the outer surfaces and a bottom of the insulating bag 92 are surrounded by the fiber carpet 16.

[0097] A system 94 suitable for producing the insulating bag 92 from the insulating packaging 10 is shown in Figure 10. The system 94 can be referred to as a hot-melt system 94. It can be connected to the fiber distribution unit 76 such that the insulating packaging 10 can be transported directly from the fiber distribution unit 76 to the system 94. The system 94 comprises an interrupted conveyor belt 96 which can transport the insulating packaging 10. Furthermore, the system 94 comprises a hot-melt adhesive application unit 98 which is designed to apply hot-melt adhesive to the insulating packaging 10. The interrupted conveyor belt 96 is designed to position the insulating packaging 10 such that it projects beyond an opening 100 in the interrupted conveyor belt 96. That is, the conveyor belt 96 is interrupted such that it is arranged upstream and downstream of the opening 100."Upstream" and "downstream" in this context can mean "upstream with respect to the transport direction" or "downstream with respect to the transport direction." A pivoting arm 102 with vacuum suction cups, for example, which can be pneumatically actuated, is configured to pull the insulating packaging 10 through the opening so that the insulating packaging 10 is folded / creased / turned over. The folded insulating packaging 10 is transported via a chute 104 to a printing unit 106 of the system 94. In the illustrated embodiment, the folded insulating packaging 10 slides along the chute 104 to the printing unit 106 due to gravity. The printing unit 106 comprises two pressure belts 108, 109 which are configured to press the insulating bag 92 together in such a way that the hot-melt adhesive applied thereto firmly fixes two opposite surfaces of the insulating bag 92 to one another. By means of the stacking unit 110 of the system 94, several insulating bags 92 can be stacked.The insulating bag 92 thus produced and schematically illustrated in Figure 9 comprises an interior space 112 enclosed by the fiber carpet 16 on the outer surfaces and the bottom. Furthermore, the insulating bag 92 comprises an opening 114 configured to introduce a product into the interior space 112 of the insulating bag 92. The adhesive joints 116 of the insulating bag 92 are indicated by dashed lines in Figure 10.

[0098] Method steps for producing an insulating packaging, for example the insulating packaging 10, are shown in Figure 11 as a flow chart. In step S10, the cellulose fibers 24 are provided. Step S10 can be preceded by the following steps S6: comminuting cellulose materials and S8: defibrating the reduced-size cellulose materials. The method further comprises step S20, in which the cellulose fibers 24 are portioned into a cellulose fiber bundle 26 with cellulose fibers 44. This is followed by a step S30, in which the cellulose fibers 24 of the cellulose fiber bundle 26 are introduced into the feed unit 44. By means of the feed unit 44, the cellulose fibers 24 of the cellulose fiber bundle 26 are fed to a compression area 45. In a step S40, air is sucked out during the feeding of the cellulose fibers 24 of the cellulose fiber bundle 46.For example, air is sucked out during the introduction of the cellulose fibers 24 of the cellulose fiber bundle 26 into the feed unit 44 and / or within the feed unit 44. In a step S50, the fiber carpet 16 is introduced into a wrapping material 12. The wrapping material 12 can be formed into a bag with an inlet opening. In a step S60, the cellulose fibers 24 of the cellulose fiber bundle 26 are compressed flatly within the wrapping material 12 to form a fiber carpet 16. During step S60, air can escape from the wrapping material 12, for example a bag with an inlet opening, and be sucked out S70. In a step S80, the wrapping material can be sealed to form a closed bag 62. In a step S90, pressure is applied to the sealed bag 62 and the fiber carpet 16 arranged therein to homogenize a distribution of fibers of the fiber carpet in the sealed bag 62.

[0099] It is understood that steps S30 and S40, or S60 and S70, shown side by side in Fig. 11, can proceed parallel to one another and / or simultaneously. In step S100, the insulating packaging 10 is optionally folded and / or bent and / or turned over and glued in such a way that an insulating pocket 92 surrounded by the fiber carpet is formed.

[0100] Figure 12a shows a packaging box 118 in which an insulating packaging, for example the insulating packaging 10, is arranged. The packaging box 118 comprises an outer shell 120 with six outer surfaces and 12 edges. One of the outer surfaces is formed by hinged lid elements 122. In Figure 12a, the lid elements 122 are open, so that an inner chamber 124 of the packaging box 118 is visible. In the illustrated embodiment, two insert elements 126, 128 are arranged in the packaging box 118.

[0101] Figure 12b shows one of the insert elements 126, 128 in its elongated form. The insert element 126, 128 is configured to receive the insulating packaging 10 and, together with the insulating packaging 10, can be inserted into the inner chamber 124 of the packaging box 118. The insert element 126, 128 is bendable / bendable at two sections 130, 132. The fiber carpet 16 largely covers these bendable / bendable sections 130, 132.

[0102] To insert the insert element 126, 128 into the inner chamber 124, the insert element 126, 128 is bent / kinked at the sections 130, 132. The fiber carpet 16 of the insulating packaging 10 then runs continuously along the bent / kinked sections 130, 132, so that a good insulating effect is achieved in these sections 130, 132. Furthermore, the fiber carpet 16 runs continuously, i.e., without interruption, along the longitudinal extent of the insert element 126, 128. The course of the continuous fiber carpet 16 in the insert element 128 is illustrated in Figure 12a with a dashed line. The insert element 128 is thus positioned in the inner chamber 124 such that the fiber carpet 16 largely covers two edges 134, 136. The insert element 126 is shown partially unfolded in Figure 12a, but it can be seen that it also largely covers two edges of the packaging box 118.It is understood that the unfolded portion 138 of the insert element 126 shown in Figure 12a can be folded over in such a way that it closes the inner chamber 124. This creates the inner chamber 124 enclosed by the insulating packaging 10.

[0103] By continuously forming the fiber carpet 16, four edges of the inner chamber can be largely covered with the fiber carpet 16. At the remaining eight edges, the insert elements 126, 128 abut one another in such a way that only a minor thermal bridge is created. The particularly uniform distribution of the fiber carpet 16 in the casing material 12 ensures that sufficient insulating fiber carpet 16 is also present at the edge areas, thus largely reducing thermal bridges.

Claims

Claims 1. A method for producing an insulating packaging (10), comprising the steps: - Providing cellulose fibres (24); - portioning the cellulose fibers (24) into a cellulose fiber bundle (26) with cellulose fibers (24); - loosening the cellulose fibre bundle (26); - introducing the cellulose fibres (24) of the cellulose fibre bundle (26) into a wrapping material (12); - surface compaction of the cellulose fibres (24) of the cellulose fibre bundle (26) within the wrapping material (12) to form a fibre carpet (16); - sealing the wrapping material (12) into a sealed bag (62); and - applying pressure to the sealed bag (62) and the fiber carpet (16) arranged therein to homogenize a distribution of fibers of the fiber carpet (16) in the sealed bag (62).

2. The method according to claim 1, wherein the cellulose fibers (24) are provided by shredded cellulose materials comprising cellulose fibers, wherein preferably shredded cellulose materials are obtained by shredding cellulose materials.

3. Method according to claim 1 or 2, wherein the loosening of the cellulose fiber bundle (26) takes place at at least two different positions which are spatially separated from one another in a transport direction (36) of the cellulose fiber bundle (26), wherein preferably the loosening of the cellulose fiber bundle (26) takes place by means of at least one rotating loosening rotor (30, 32).

4. Method according to one of the preceding claims, wherein the wrapping material (12) comprises a plastic-coated paper layer and / or a plastic material.

5. Method according to one of the preceding claims, wherein the areal compaction of the cellulose fibers (24) of the cellulose bundle (26) within the wrapping material (12) is carried out by means of a compaction unit (60) which comprises at least two pressure units (64) which are movable relative to one another. The method according to claim 5, wherein the compression unit (60) comprises at least one circulating pressure belt, the distance (63) of which from an opposite surface is variable, so that air escapes from the wrapping material (12) as the distance (63) decreases. The method according to one of the preceding claims, wherein, before sealing the wrapping material (12) into a closed bag (62), dust particles are vacuumed off at a filling opening of the wrapping material (62). The method according to one of the preceding claims, wherein the closed bag (62) is folded and / or creased and / or turned over and glued in such a way that it forms an insulating bag (92) surrounded by the fiber carpet (16). Insulated packaging (10), preferably produced using a method according to one of the preceding claims, comprising: - a wrapping material (12) comprising a plastic-coated paper layer which forms a sealed bag (62) by forming at least one sealing section; and - a filling comprising a fiber carpet (16) made of cellulose fibers, wherein the fiber carpet (16) has a continuous length (18) of more than 60 cm, preferably more than 70 cm, more preferably more than 80 cm, and a continuous width (20) of more than 20 cm, preferably more than 30 cm, more preferably 40 cm or more. Insulated packaging (10) according to claim 9, wherein the paper layer comprises a kraft paper, which is preferably coated with a sealable plastic layer. Insulated packaging (10) according to claim 9 or 10, wherein the paper layer has at least one of the following properties: - contains unbleached paper, - is heat sealable, - has a water vapor barrier, - a weight between 67 and 77 g / m 2 preferably between 69 and 75 g / m 2 more preferably between 71 and 73 g / m 2 has, has a thickness between 92 and 102 pm, preferably between 94 and 100 pm, more preferably between 96 and 98 pm. Plant for producing an insulating packaging (10), in particular according to one of claims 9 to 11 and / or according to a method according to one of claims 1 to 8, comprising: - a portioning unit (22) for portioning cellulose fibers (24) into a cellulose fiber bundle (26) with cellulose fibers (24), wherein the portioning unit (22) comprises: - a chamber (28) for receiving a defined quantity of the cellulose fibres (24); - a fiber loosening unit (30, 32) for loosening the cellulose fibers (24) and / or the cellulose fiber bundle (26), wherein the fiber loosening unit (30, 32) is arranged in the chamber (28); - a transport unit (38) for transporting the cellulose fibres (24) and / or the cellulose fibre bundle (26); and - preferably a stripping device (37) for stripping the cellulose fibre bundle (26); - a feeding unit (44) for feeding the cellulose fibres (24) of the cellulose fibre bundle (26) to a compression area (45), - wherein the supply unit (44) comprises at least one suction unit (46) which is arranged to suck air out of the supply unit (44), - a wrapping material feed device (50) for feeding wrapping material (12), wherein the wrapping material feed device (50) is designed to feed the wrapping material (12) in such a way that it envelops the cellulose fibers (24) fed to the compression region (45) by means of the feed unit (44); - a compacting unit (60) for compacting the cellulose fibers (24) covered with the wrapping material (12) in the compacting area (45) to form a fiber carpet (16), comprising two pressure units (64) movable relative to one another; - a sealing unit (56, 58) for sealing the wrapping material (12) into a sealed bag (62); and - a fiber distribution unit (76) for homogenizing a distribution of fibers of the fiber carpet (16) in the wrapping material (12), which comprises at least one pressure-exerting element (78) acting on the wrapping material (12) of the bag (62) and consequently on the fiber carpet (16).

13. The system of claim 12, further comprising: - a shredder for shredding cellulose material; - a storage container for storing shredded cellulose; and / or - a defibration machine for defibrating the shredded cellulose material into cellulose fibres (24).

14. The system of claim 12 or 13, further comprising: - an air transport unit for transporting the cellulose fibres (24) by means of an air stream; and / or - a separation unit for removing air and feeding the cellulose fibres (24) into the portioning unit (22).

15. Plant according to one of claims 12 to 14, wherein the chamber (28) of the portioning unit (22) comprises a fill level gauge for measuring a fill level of the cellulose fibers (24) in the chamber (28).

16. Installation according to one of claims 12 to 15, wherein the portioning unit (22) further comprises a shut-off element (40) which is arranged within the chamber (28) and is designed to limit the height of the chamber (28) at least in a defined region of the chamber (28) and / or to divide the chamber (28) into two chamber sections (29, 34).

17. Plant according to one of claims 12 to 16, wherein the portioning unit (22) further comprises a further fiber loosening unit (32) which is arranged offset from the fiber loosening unit (30) in the transport direction (36), wherein the further fiber loosening unit (32) is arranged in the chamber (28).

18. Plant according to claims 16 and 17, wherein - the fibre loosening unit (30) in the transport direction (36) in front of the shut-off element and / or - the further fibre loosening unit (32) is arranged downstream of the shut-off element (40) in the transport direction (36).

19. Plant according to one of claims 12 to 18, wherein the stripping device (37) comprises a height-adjustable paddle wheel, the paddles (39) of which are preferably curved.

20. Installation according to one of claims 12 to 19, wherein the portioning unit (22) further comprises a suction device (42) for sucking air and suspended matter from the chamber (28), preferably from both chamber sections (29, 34). 21 . Plant according to one of claims 12 to 20, wherein the at least one suction unit (46) of the feed unit (44) is arranged on an edge and / or a corner and / or a curve of the feed unit (44), wherein the at least one suction unit (46) is configured to suck out air and suspended matter during feeding of the cellulose fibers (24) of the cellulose fiber bundle (26) through the feed unit (44).

22. Plant according to one of claims 12 to 21, wherein the compaction unit (60) comprises at least one vertical pressure belt system (65) which rotates in the transport direction (36) and is designed to transport the surface of the wrapping material (12) lying thereon in the transport direction (36).

23. System according to one of the preceding claims 12 to 22, wherein the sealing unit (58) is arranged upstream of the compression unit (60) and transversely to the transport direction (36) of the wrapping material (12), and / or wherein the system further comprises a compressed air supply unit which is arranged adjacent to the sealing unit (58) and which is designed to deliver compressed air in the direction of the sealing unit (58).

24. System according to one of the preceding claims 12 to 23, wherein the at least one pressure-exerting element (78) of the fiber distribution unit (76) - is mounted on a rotatable shaft (80); - extends over a width of at least 20 cm, preferably at least 30 cm, more preferably at least 40 cm, even more preferably up to 60 cm; - is made of plastic or at least coated or partially coated with plastic, so that only sections of the at least one pressure-exerting element (78) acting on the wrapping material (12) which has a plastic surface; and / or - comprises at least three pressure-exerting elements (78), preferably at least 6 pressure-exerting elements (78), more preferably at least 9 pressure-exerting elements (78).

25. System according to one of the preceding claims 12 to 24, wherein the fiber distribution unit (76) further comprises a transport unit (82, 90) which is adapted to move the at least one pressure-exerting element (78) and the bag (62) relative to one another, wherein preferably the transport unit (82, 90) comprises at least one rotatably mounted rotation element.

26. Plant according to one of the preceding claims 12 to 25, wherein the wrapping material feed device (50) comprises a forming shoulder (54) for forming a wrapping material (12) enclosed by at least two sides, wherein the forming shoulder (54) comprises at least one suction unit.

27. Packaging box (1 18), comprising: - an insulating packaging (10), preferably according to one of claims 9 to 11 and / or preferably produced in a method according to one of claims 1 to 8 and / or by means of a system according to one of claims 12 to 26, comprising: - a wrapping material (12) which forms a completely sealed bag (62) by means of at least one sealing section (14), and - a filling comprising a fibre carpet (16) made of cellulose fibres, - wherein the fiber carpet (16) has a continuous length (18) of more than 60 cm, preferably more than 70 cm, more preferably more than 80 cm, and a continuous width (20) of more than 20 cm, preferably more than 30 cm, more preferably 40 cm or more, - an outer shell comprising six shell surfaces and twelve edges (134, 136) which is designed to completely enclose a cuboid-shaped inner chamber (124), and - an insert element (126, 128) which is designed to receive the insulating packaging (10) and to be inserted together with the insulating packaging (10) into the inner chamber (124) such that the insert element (126, 128) covers at least a large part of three inner circumferential surfaces and two edges (134, 136) of the inner chamber (124), - wherein the insert element (126, 128) is bendable and / or bendable at two sections (130, 132), and - wherein the fiber carpet (16) of the insulating packaging (10) largely covers the foldable and / or bendable sections (130, 132) of the insert element (126, 128).

28. Packaging box according to claim 27, wherein the fiber carpet (16) is designed to be foldable and / or bendable, wherein the fiber carpet (16) is formed continuously at its folded and / or bent sections (130, 132).

29. Packaging box according to claim 28, wherein a folded and / or bent portion of the continuous fiber carpet (16) is arranged adjacent to one of the edges (134, 136) of the inner chamber (124) and / or covers at least a large part of it.

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