WO2024028456A1

WO2024028456A1 - Method for producing an insulating packaging, insulating packaging, plant for producing an insulating packaging, packaging box

Info

Publication number: WO2024028456A1
Application number: PCT/EP2023/071585
Authority: WO
Inventors: Marco Knobloch; Sebastian Leicht
Original assignee: easy2cool GmbH
Priority date: 2022-08-03
Filing date: 2023-08-03
Publication date: 2024-02-08
Also published as: DE102022119517A1

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

Method for producing insulated packaging, insulated packaging, system for producing insulated packaging, packaging box

The invention relates to a method for producing an insulating packaging, an insulating packaging, a system for producing an insulating packaging and a packaging box with an insulating packaging.

Insulating packaging made of foamed polystyrene (EPS) is known from the prior art, which enables mobile cooling of products. The products to be cooled are placed in a container, usually a square box made of EPS, together with a cooling medium, such as ice packs or dry ice, and closed with a removable EPS lid. In this way, depending on the performance of the cooling medium, the products can be cooled for several hours or even up to several, for example two, days. The EPS box with the lid closed can be placed in a shipping box and shipped.

In many cases, when shipping refrigerated products, such as food or medication, the insulated packaging is discarded after use. In terms of ecological balance, a recycling process for insulated packaging is preferred. There is a lack of established recycling processes for EPS materials, especially for private households. In addition, EPS is a mineral material, so recycling it requires an energy-intensive process. Consequently, the use of EPS as insulating packaging involves high manufacturing and recycling costs.

Based on the prior art, the invention is based on the object of enabling the production and use of insulating packaging with a high degree of efficiency and effectiveness.

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

A method for producing an insulating packaging is provided, comprising the following steps: providing cellulose fibers; Portioning the cellulose fibers into a cellulose fiber bundle with cellulose fibers; loosening the cellulose fiber bundle; Introducing the cellulose fibers of the cellulose fiber bundle a wrapping material; flat compaction of the cellulose fibers of the cellulose fiber bundle within the casing material to form a fiber carpet (16); Sealing the wrapping material into a sealed bag; and applying pressure to the closed bag and the fiber carpet arranged therein to homogenize a distribution of fibers of the fiber carpet in the closed bag.

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

The use of cellulose fibers is advantageous from an ecological point of view as they can be obtained from recyclable materials such as waste paper. Consequently, CO ₂ consumption is significantly reduced compared to using EPS. Furthermore, the use of cellulose fibers enables energy-efficient production, in which, for example, energy expenditure can be reduced to 5 to 10% compared to the production of conventional EPS insulating packaging. Recycling materials made from cellulose fibers is also very easy. It can be disposed of like waste paper, for which there are established recycling processes for both private households and industrial applications.

The cellulose fibers provide the desired insulating effect. For this purpose, they preferably have a low thermal conductivity, which is, for example, 36 mW/m*K (lambda). This thermal conductivity is, for example, better in terms of its insulating effect compared to known blown insulation materials with a thermal conductivity of 40 mW/m*K (lambda) and almost as high as the thermal conductivity of EPS.

A particularly low thermal conductivity of cellulose fibers can be achieved if the fibers are short and thin. Short and thinner fibers can be more flexible and thus form more homogeneous cellulose materials with a uniform pore size distribution. With longer fibers, the air inclusions can be more uneven, which can lead to an inhomogeneous density distribution and a fluctuating mass distribution in the longitudinal and transverse directions. Thermal bridges can be formed, which lead to an increase in thermal conductivity. In addition, it has been shown that low fiber fibrillation - fibrils are fine hairs on the fiber surface that point into free 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.

In some embodiments, the cellulosic fibers are provided by defibrating shredded cellulosics comprising cellulosic fibers. Preferably, shredded cellulose materials are obtained by shredding cellulose materials.

The cellulose material can include paper, cardboard, waste paper and newspapers. In addition, cellulose material, for example, is understood to mean all materials that consist primarily of cellulose fibers. For example, recycled waste paper B12 can be used. Waste paper or mixed paper B12 is made up of newspapers, cardboard and writing paper, although it should preferably contain a maximum of 40% newspapers or magazines.

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.

The cellulose material can be shredded using a single-shaft shredder. Shredded cellulose includes, for example, shredded paper and cardboard shreds. The shredded cellulose can be stored in a silo. Using a eddy current mill, the shredded cellulose material can be defibered into cellulose fibers. Cellulose fibers can be transported using an air stream or a conveyor belt. A cyclone separator can be used to remove residual air from the cellulose fibers. In this way the cellulose fibers can be compacted. Residual air can be cleaned using a filter tower.

A measured amount of cellulose fibers loosely bonded together can form the cellulose fiber bundle. The cellulose fiber bundle can be loosened at at least two different positions, which are spatially separated from one another in a transport direction of the cellulose fiber bundle. Preferably, the cellulose fiber bundle is loosened by means of at least a 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. At least two loosening rotors are preferably provided. The loosening rotor can comprise a rotating shaft or can be designed as such.

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 made 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 insulated packaging and improves its ecological balance. Plastic is easier to deform than paper and can be made with a very thin material thickness.

The covering material preferably completely surrounds the fiber carpet. When introducing the cellulose fibers and/or when forming the fiber carpet, the covering material preferably has a bag shape with three closed sides and a filling opening.

In some embodiments, the flat compaction of the fiber carpet within the covering material takes place by means of a compaction unit which comprises at least two pressure units that can be moved relative to one another. A pressure unit is preferably set up to exert pressure on the covering material and the fiber carpet contained therein in such a way that air, e.g. residual air, escapes from the fiber carpet and from the covering material. At least one of the printing units can be designed to be stationary, while the other printing unit can move towards it. Both printing units can be arranged vertically to one another.

Furthermore, the compression unit can comprise at least one circumferential pressure belt, the distance of which from an opposite surface can be changed, so that air escapes from the casing material while the distance is reduced. The opposite surface can be formed by the second printing unit. The printing belt and the opposing surface may be arranged vertically. The opposite surface or the second printing unit can comprise a further rotating printing belt. The at least one pressure band ensures an even distribution of the fiber carpet within the covering material. The at least one printing belt comprises, for example, a revolving belt, ie a belt guided over two revolving rollers, so that the wrapping material moves in the transport direction due to the movement of the printing belt.

Preferably, the wrapping material is completely closed after the fiber carpet has been compacted, i.e. preferably no air can enter or escape from the wrapping material. The bag made of wrapping material is therefore preferably sealed in an airtight manner.

In order to securely close the wrapping material, it can be advantageous if dust particles are sucked off at a filling opening of the wrapping material before the wrapping material is sealed to form a closed bag.

In general, for example, suction channels can be provided for extracting dust particles. Such suction 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.

The insulating packaging produced using the above method preferably has a thickness of 20 to 25 mm with a standard basis weight of between 800 and 1350 g/m ² , preferably between 1200 and 1300 g/m ² , more preferably of 1250 g/m ² . In another embodiment, the insulating packaging produced using the above method can preferably have a thickness of 25 to 35 mm with a standard basis weight of between 1700 and 2000 g/m ² , preferably between 1750 and 1850 g/m ² , more preferably of 1800 g/m 2 ² . Generally speaking, the insulating packaging may 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 at most 2000 g/m ² , at most 1800 g/m ² or at most 1600 g/m ² have. The covering material with the fiber carpet contained in it, i.e. the insulating packaging, can also be further processed into an insulating bag. Preferably, after the step of applying pressure to the closed bag, a further step follows. In these cases, the closed bag is preferably folded and/or creased and/or folded over and glued in such a way that it forms a bag surrounded by the fiber carpet.

According to a further aspect of the invention, the above object is achieved by an insulating packaging which comprises a wrapping material comprising a plastic-coated paper layer which forms a closed bag by forming 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. The insulating packaging is preferably produced in a method according to the first aspect of the invention.

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

The wrapping material can, for example, form a completely closed bag by means of sealing sections. One of the sealing sections can connect two opposite ends of the casing material to one another, so that a casing material tube with a circumferentially closed lateral surface is created. Another sealing portion may close the wrapping material tube to form an open bag. Another sealing portion may close the open-end bag to form a fully sealed bag. Furthermore, other sealing sections are conceivable, as long as one a completely closed bag is formed in which the fiber carpet can be received. The bag is preferably sealed airtight.

The fiber carpet is continuous. This means that the fiber carpet is preferably designed to be uninterrupted along its length and width. In addition, the covering material is preferably designed to be continuous. I.e. 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 exactly one chamber for receiving the filling.

The paper layer may comprise a 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 mean a type of paper that consists of more than 90%, preferably more than 95%, more preferably more than 98%, of cellulose fibers. Starch, alum and/or glue can be added to achieve surface effects and increases in strength. The paper layer is preferably coated on one side with plastic, e.g. polyethylene (PE). The plastic coating can enable an airtight seal of the wrapping material. In addition, the paper layer can be water-repellent thanks to the plastic coating.

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

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 ² . Furthermore, in one embodiment, the paper layer has a thickness between 92 and 102 pm, preferably between 94 and 100 pm, more preferably between 96 and 98 pm. 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 burst 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 permeability according to the 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 a strength of the paper layer that is suitable for use as an insulating material.

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 with the features according to the above aspect. In addition, for example, the system can be used to produce an insulating material that is produced according to the above method.

The insulating packaging includes a portioning unit for portioning cellulose fibers into a cellulose fiber bundle. The portioning unit includes 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, the fiber loosening unit being 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 supply unit comprises at least one suction unit which is set up to extract air from the supply unit. The system further comprises a wrapping material feed device for feeding wrapping material, wherein the wrapping material feed device is set up to feed the wrapping material in such a way 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 covered with the covering material in the compression area into a fiber carpet, comprising two pressure units that can be moved relative to one another; a sealing unit for sealing the wrapping material into a sealed bag; and a fiber distribution unit for homogenizing a distribution of fibers of the fiber carpet in the wrapping material, comprising 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 a good thermal conductivity of approximately 36 mW/m*K and is therefore particularly suitable for use as an insulating material, for example. The system also makes it possible to produce insulating packaging that is suitable for cooling food, for example.

The system can also include a shredder for shredding cellulose material; a storage container for storing shredded cellulose; or/and a defibration machine for defibration of the shredded cellulose material into the cellulose fibers. In this way, the system can provide cellulose fibers for further processing. The shredder may include a single-shaft shredder. The storage container can include a silo. The defibration machine can include a eddy current mill. Furthermore, other technical configurations of the shredder, the storage container and/or the defibration machine are possible.

In some embodiments, the system further comprises an air transport unit for transporting the cellulose fibers using an air stream. Furthermore, the system can include a separation unit for removing air and for feeding the cellulose fibers into the portioning unit. The separation unit can include a cyclone separator. Furthermore, a residual air filter can be provided for cleaning the residual air on the separation unit. This prevents fine dust and/or individual cellulose fibers from being released into the environment.

For a constant amount of cellulose fibers per insulating packaging, the chamber of the portioning unit can include a level meter for measuring a level of the cellulose fibers in the chamber. The level meter can include a vibration sensor. Alternatively or additionally, the level meter can include a rotary paddle switch as a level meter. Based on the determined filling level of the cellulose fibers, the amount of cellulose fibers contained in the chamber can be calculated. For this purpose, the system includes, for example, a corresponding calculation unit.

The portioning unit can further comprise a shut-off element which is arranged within the chamber and is designed 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 can be a gate valve or another element that is suitable for limiting the height of the chamber at least in a defined area of the chamber and/or dividing the chamber into the two chamber sections.

The portioning unit can further comprise a further fiber loosening unit, which is arranged offset from the fiber loosening unit in the transport direction, the further fiber loosening unit being arranged in the chamber. The transport direction can be defined by the direction of movement and processing of the cellulose fibers.

The fiber loosening unit is preferably arranged in front of the shut-off element in the transport direction. The further fiber loosening unit is preferably arranged after the shut-off element in the transport direction. The at least one fiber loosening unit ensures that the cellulose fibers are further processed as homogeneously distributed fibers.

The stripping device can comprise a height-adjustable paddle wheel, the blades of which are preferably curved. In particular, the height of the cellulose fiber bundle can be reduced. The blades of the paddle wheel preferably comprise curved sheets. The blades of the paddle wheel touch or slide along a surface of the cellulose fiber bundle. Excess cellulose fibers can thus be removed from the cellulose fiber bundle.

The portioning unit can further comprise a suction device for suctioning air and suspended matter from the chamber, preferably from both chamber sections.

The at least one suction unit of the feed unit can be arranged on an edge and/or a corner and/or a curve of the feed unit. The at least one suction unit can be set up to suck out air and suspended matter while the cellulose fibers of the cellulose fiber bundle are fed through the feed unit.

The feed unit can comprise a vertical format tube, with at least one suction unit being arranged in the format tube. For example, four suction units can be provided in the feed unit or the format tube, which are arranged on 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.

When the cellulose fibers of the cellulose fiber bundle have passed through the format tube, they are surrounded by the casing material and arranged in the compression area. The compression unit ensures compression of the cellulose fibers to form a fiber carpet and a uniform thickness of the fiber carpet. The compaction unit comprises, for example, at least one vertical pressure belt system, which rotates in the transport direction and is set up to transport the surface of the wrapping material lying thereon in the transport direction. The covering material adheres, for example, to a printing belt of the printing belt system by means of static friction. The compression unit can be set up to remove air from the casing material. By means of the compaction unit, uniform compaction and distribution of the fiber carpet in the covering material can be achieved. This ensures that the fiber carpet does not fall below or exceed a specified thickness.

With the sealing unit, the wrapping material can be closed, for example by heat sealing. The sealing unit can be arranged upstream, i.e. against the transport direction, of the compression unit and transversely 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 designed to deliver compressed air in the direction of the sealing unit. The compressed air is used to remove any particles that may be present in the area of the sealing unit.

For a particularly uniform distribution of the fiber carpet in the closed casing material, the fiber carpet can be distributed in the casing material by means of the fiber distribution unit. For this purpose, the fiber distribution unit has at least one pressure-exerting element.

The at least one pressure-exerting element of the fiber distribution unit can be rotatably attached, for example attached to 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, even more preferably up to 60 cm. The at least one pressure-exerting element can be made of plastic or at least encased or partially encased in plastic, so that only sections of the at least one pressure-exerting element act on the casing material, which have a plastic surface. 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 each other transversely to the transport direction.

Preferably, the fiber distribution unit further comprises a transport unit which is designed to move the at least one pressure-exerting element and the bag relative to one another. The transport unit can be a rotating rotation element which, for example, includes several edges, for example four edges.

The devices and/or units mentioned can each include dedicated control units and/or controllers. Alternatively or additionally, at least one control unit and/or controller can be provided, which controls at least two and/or more of the devices and/or units mentioned. 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 controls and/or control units included therein.

The wrapping material supply device can comprise a shaping shoulder for shaping a wrapping material enclosed on at least two sides, the shaping shoulder comprising the at least one suction unit.

Overall, the system can comprise elements/units/devices arranged vertically relative to one another and can therefore be referred to as a vertical packaging system. The cellulose fibers can be filled into the portioning unit due to gravity, i.e. the cellulose fibers fall into the chamber of the portioning unit due to their own weight. Alternatively or additionally, cellulose fibers can be introduced into a filling opening of the feed unit, for example into the format tube, due to gravity.

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

According to a further aspect of the invention, the above object is achieved by a packaging box. The packaging box comprises an insulating packaging, preferably according to one of the preceding aspects of the invention and/or preferably produced in a method according to one of the preceding aspects of the invention and/and by means of a system according to one of the preceding aspects of the invention. The insulating packaging comprises a wrapping material which forms a completely closed bag by means of at least one sealing section, and a filling which comprises a fiber carpet made of cellulose fibers, the fiber carpet having a continuous length of more than 60 cm, preferably more than 70 cm, more preferably more than 80 cm, and has 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.

The packaging box further comprises an outer jacket comprising six lateral surfaces and twelve edges, which is designed to completely enclose a cuboid-shaped inner chamber, and an insert element which is designed to accommodate 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 three inner lateral surfaces and two edges of the inner chamber to at least a large extent, the insert element being foldable and/or bendable in two sections, and the fiber carpet of the insulating packaging covering the foldable and/or bendable sections of the insert element to a large extent.

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

The packaging box can include a further insert element. The further insert element can be arranged in such a way that it largely covers a further three inner lateral surfaces and a further two edges of the inner chamber. Thus, all six inner lateral surfaces of a cuboid inner chamber can be largely covered by means of two insert elements. The two Insert elements can rest against each other on eight edges or at least be arranged adjacent to one another.

The fiber carpet can be designed to be foldable and/or bendable, with the fiber carpet being designed to be continuous in its folded and/or curved sections. Continuous training means that the fiber carpet runs continuously on kinked and/or curved sections, i.e. a fiber composite of the fiber carpet made of cellulose fibers remains. This means that the fiber carpet preferably also develops its insulating function in the kinked and/or curved sections.

For example, a kinked and/or curved section of the continuous fiber carpet is arranged adjacent to one of the edges of the inner chamber and/or covers it to at least a large extent.

The present invention is described below by way of example using the attached figures. The drawing, description and claims contain numerous features in combination. The person skilled in the art will also expediently consider the features individually and use them in combination within the scope of the claims.

If there is more than one example of a particular object, only one of them may be provided with a reference number in the figures and in the description. The description of this instance can be transferred to the other instances of the object accordingly. If objects are named in particular using number words, 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, can be included. However, a number and/or a sequence of objects could also be derived from number words.

Show it:

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

Figures 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;

Fig. 4 shows a schematic representation of a packaging system;

Fig. 5 shows an exemplary embodiment of a format tube

Packaging system in a schematic representation;

6 shows an exemplary embodiment of a section of a packaging system in a schematic representation;

Fig. 7 shows a schematic representation of a compression unit of a packaging system;

8a-b shows a schematic representation of a fiber distribution unit of a packaging system;

Fig. 9 shows an insulating bag;

Fig. 10 shows a schematic representation of a system for producing an insulating bag from an insulating packaging;

Fig. 1 1 shows a flow diagram of a method for producing an insulating packaging; and

Figs. 12a-b show a packaging box and an insert element contained therein in a single view.

An insulating packaging 10 is shown schematically in Figure 1. The insulating packaging 10 comprises a wrapping material 12, which is formed into a closed bag by means of at least one longitudinal seam 14 and by means of 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 covering material 12 to form a tube which is closed at two opposite ends by means of the two transverse transverse seams. In the illustrated embodiment, the wrapping material 12 is a plastic-coated paper layer that is coated with a plastic layer made of polyethylene and is heat-sealable, or a heat-sealable plastic layer. In the covering material 12 there is a filling which comprises a fiber carpet 16 made of cellulose fibers. The fiber carpet 16 is indicated by dashed lines in FIG. 1 and is completely surrounded by the covering 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.

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

The system for producing the insulating packaging 10 includes a portioning unit 22 shown in FIG. 3 for portioning cellulose fibers 24 into a cellulose fiber bundle 26. Cellulose fibers 24 are shown schematically in FIG. 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 FIG. 2b is formed.

To form the cellulose fiber bundle 26, the portioning unit 22 comprises a chamber 28 which is designed to accommodate a defined amount of the cellulose fibers 24. A level meter arranged in the chamber 28 records the amount of cellulose fibers 24 taken up in the chamber 28.

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 differences in density of the cellulose fibers 24 and to prevent bridging of the cellulose fibers, which could lead to blockages. In the embodiment shown, 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, the second chamber section 34 being in the transport direction 36 on the first Chamber section 29 connects. The first fiber loosening unit 30 is in the first chamber section 29 and the second fiber loosening unit 32 is in the second chamber section 34 intended. The cellulose fibers 24 are transported within and out of the chamber 28 by means of a transport unit 38, which is shown in FIG. 3 as a rotating conveyor belt. The transport unit 38 is set up to enable transport in the transport direction 36.

In the embodiment shown, 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 shown in the illustrated embodiment as a height-adjustable sliding element. The shut-off element 40 can be designed 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.

In the chamber 28, for example the second chamber section 34, a stripping device 37 for stripping the cellulose fiber bundle 26 is provided. The stripping device 37 is shown as a height-adjustable rotating element with rotating blades 39. The blades 39 are designed to touch and graze the surface of the cellulose fiber bundle 26. This causes individual loose cellulose fibers to be removed. A suction device 42 arranged in the chamber 28 is set up to suck out the loose cellulose fibers and/or air together with dust particles and suspended matter from the chamber 28.

The portioning unit 22 is followed in the transport direction 36 by a feed unit 44, which can be seen in FIG. 4 and is arranged vertically below the portioning unit 22. The cellulose fiber bundle 26 is transported 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.

5 shows a top view of a format tube 48 of the feed unit 44 with suction units 46 arranged therein. In the exemplary embodiment shown, four suction units 46 are arranged at four corners of the format tube 48. It 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 jacket of the format tube 48.

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 shaping shoulder 54 for shaping the wrapping material 12. The wrapping material 12 is supplied as roll goods in strip form and shaped by the shaping shoulder 54 in such a way that it covers the format tube 48. The wrapping material 12 is sealed along opposite ends (longitudinal seam), creating an open tube. A longitudinal sealing device 56 intended for sealing is indicated in FIG. The tube made of covering 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 FIGS. 4 and 7.

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

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

The two printing units 64 are set up to act on the bag in this way

Covering material 12 and consequently act on the fiber carpet 16 so that air comes out of the Filling opening of the open bag made of wrapping material 12 can escape. The fiber carpet 16 is thus compacted.

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 made of wrapping material 12 in such a way that the closed bag 62 made of wrapping material 12 is formed.

The suction unit 46, for example suction channels 46, in the format tube 48 and possibly further suction units are set up to clean a sealing level for sealing the open bag from 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 set up to move together and act on the wrapping material 12 from opposite sides. When the sealing tools are moved together, compressed air nozzles (not shown) can be activated to clean the sealing plane of cellulose fibers and dust particles.

In the embodiment shown in Figure 7, the printing units 64 are designed as printing belts which can be moved around deflection rollers 68 in the direction of rotation 70. The pressure units 64 exert a pressure force on the open bag and the fiber carpet 16 contained therein from two opposite directions, as a result of which the fiber carpet 16 is evenly distributed in the bag. In addition, the movement of the pressure belts ensures that the bag 62 is transported in the transport direction 36.

A separation unit 72 is integrated into the transverse sealing device 58 and/or arranged to overlap with the transport direction 36. Through the combination of transverse sealing device 58 and separating unit 72, two transverse seams 15 are formed at one point and these transverse seams 15 are severed. A first of these transverse seams 15 forms a rear transverse seam 15 of a first bag that is transported further in relation to the transport direction 16, and a second of these Transverse seams 15 form a front transverse seam 15 of a second bag that is transported less far in relation to the transport direction 16. In other words, the transverse sealing device 58 is set up to produce two transverse seams 15 at once, which are assigned to two bags 62 manufactured immediately one after the other. The separation unit 72 is set up to separate the wrapping material 12 in the area 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 can be seen in Figure 4, the closed and separated bag 62 can be picked up by means of a further transport unit 74 and transported further to a fiber distribution unit 76 (see Figures 8a-b).

The transverse seam 14 for closing the filling opening of the bag in which the fiber carpet 16 is accommodated can at the same time be the transverse seam 14, which closes the tube made of wrapping material 12 in order to form another bag upstream of the transport direction 36.

The fiber distribution unit 76 is shown schematically in Figure 8a. It comprises at least one pressure-exerting element 78 acting on the closed bag 62. The pressure-exerting element 78 rotates about a rotation axis 80 and exerts pressure on the bag 62 and the fiber carpet 16 arranged therein with each rotation. 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.

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

To transport the closed 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 solid base 84. The bag 62 is movable between the solid surface 84 and the shaft 82. In the present case, the solid surface 84 is part of a conveyor belt. Furthermore, a rotation element 88 rotating about its longitudinal axis 86 is provided for fixing the bag 62. The rotation element 88 has a square cross section in the illustrated embodiment. However, other cross-sections are also conceivable, for example any polygonal cross-section, as long as it is possible to fix the bag 62 in place. In the illustrated embodiment, the fiber distribution unit 76 comprises two motor-driven rotating shafts 82, 90, one of which is arranged in front of the pressure-exerting element 78 in the transport direction 36 and the other after the rotating element 88. One 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 part 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.

The wrapping material 12 with the fiber carpet 16 contained 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 creased and/or folded over and glued in such a way that it forms an insulating bag 92 surrounded by the fiber carpet 16, with at least the lateral surfaces and a bottom of the insulating bag 92 being surrounded by the fiber carpet 16.

A system 94 suitable for producing the insulating bag 92 from the insulating packaging 10 can be seen in FIG. The system 94 can be referred to as a hot melt system 94. It can be connected to the fiber distribution unit 76 in such a way that the insulating packaging 10 can be transported from the fiber distribution unit 76 directly to the system 94. The system 94 includes an interrupted conveyor belt 96 that can transport the insulating packaging 10. Furthermore, the system 94 includes a hot glue application unit 98, which is set up to apply hot glue to the insulating packaging 10. The interrupted conveyor belt 96 is designed to position the insulating packaging 10 in such a way that it projects beyond an opening 100 in the interrupted conveyor belt 96. Ie the conveyor belt 96 is interrupted in such a way that it is arranged upstream and downstream of the opening 100. In this context, “upstream” and “downstream” can mean “relative to the transport direction in front” or “relative to the transport direction behind”. A pneumatically actuated swivel arm 102 with vacuum suction cups, for example, is set up to pull the insulating packaging 10 through the opening so that the insulating packaging 10 is folded/creased/folded over. The folded insulating packaging 10 reaches a printing unit 106 of the system 94 via a slide 104. In the embodiment shown, the folded insulating packaging 10 slides along the slide 104 to the printing unit 106 due to gravity. The printing unit 106 comprises two printing belts 108, 109 which are set up to to press the insulating bag 92 together in such a way that the hot glue applied thereon firmly fixes two opposite surfaces of the insulating bag 92 to one another. Using the stacking unit 110 of the system 94, several insulating bags 92 can be stacked. The insulating bag 92 thus produced and shown schematically in FIG. 9 comprises an interior 112 which is enclosed by the fiber carpet 16 on the lateral surfaces and the bottom. Furthermore, the insulating bag 92 includes an opening 114, which is designed to introduce a product into the interior 112 of the insulating bag 92. The adhesive connections 1 16 of the insulating bag 92 are indicated in Figure 10 with dashed lines.

Process steps for producing an insulating packaging, for example the insulating packaging 10, are shown as a flow chart in FIG. In step S10, the cellulose fibers 24 are provided. Step S10 can be preceded by the following steps S6 shredding of cellulose materials and S8 defibering of the reduced cellulose materials. The method further includes 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 covering material 12. The wrapping material 12 can be formed into the bag with an inlet opening. In a step S60, the cellulose fibers 24 of the cellulose fiber bundle 26 are compressed flatly within the casing material 12 to form a fiber carpet 16. During step S60, air can escape from the casing material 12, for example a bag with an inlet opening, and can be sucked out S70. In a step S80, the wrapping material can be sealed into a closed bag 62. In a step S90, pressure is applied to the closed bag 62 and the fiber carpet 16 arranged therein in order to homogenize a distribution of fibers of the fiber carpet in the closed bag 62.

It is understood that the steps S30 and S40 or S60 and S70 shown side by side in FIG. 1 1 can run parallel to one another and/or simultaneously. The insulating packaging 10 is optionally folded and/or creased and/or folded over in step S100 and glued in such a way that an insulating bag 92 surrounded by the fiber carpet is formed.

Figure 12a shows a packaging box 118 in which an insulating packaging, for example the insulating packaging 10, is arranged. The packaging box 1 18 includes an outer jacket 120 with 6 lateral surfaces and 12 edges. One of the lateral surfaces is formed by hinged cover elements 122. In Figure 12a, the cover elements 122 are opened, so that an inner chamber 124 of the packaging box 1 18 is visible. In the embodiment shown, two insert elements 126, 128 are arranged in the packaging box 118.

Figure 12b shows one of the insert elements 126, 128 in its elongated shape. The insert element 126, 128 is designed to accommodate the insulating packaging 10 and to be insertable together with the insulating packaging 10 into the inner chamber 124 of the packaging box 1 18. The insert element 126, 128 can be folded/bent on two sections 130, 132. The fiber carpet 16 largely covers these foldable/bendable sections 130, 132.

To insert the insert element 126, 128 into the inner chamber 124, the insert element 126, 128 is bent/bent at the sections 130, 132. The fiber carpet 16 of the insulating packaging 10 then runs continuously along the folded/bent sections 130, 132, so that a good insulation effect is achieved in these sections 130, 132. The fiber carpet 16 also 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 in such a way that the fiber carpet 16 largely covers two edges 134, 136. The insert element 126 is shown partially opened in FIG. 12a, but it can be seen that this also largely covers two edges of the packaging box 118. It is understood that the opened part 138 of the insert element 126 shown in FIG. 12a can be folded down in such a way that it closes the inner chamber 124. This creates the inner chamber 124 enclosed by the insulating packaging 10.

By continuously forming the fiber carpet 16, four edges of the inner chamber can be largely covered with the fiber carpet 16. To the On the remaining eight edges, the insert elements 126, 128 abut one another in such a way that only a slight thermal bridge is created. The particularly uniform distribution of the fiber carpet 16 in the covering material 12 ensures that there is also sufficiently insulating fiber carpet 16 at the edge areas, so that a thermal bridge is largely reduced.

Claims

Expectations

1. Method for producing an insulating packaging (10), comprising the steps:

- Providing cellulose fibers (24);

- Portioning the cellulose fibers (24) into a cellulose fiber bundle (26) with cellulose fibers (24);

- loosening the cellulose fiber bundle (26);

- Introducing the cellulose fibers (24) of the cellulose fiber bundle (26) into a casing material (12);

- flat compaction of the cellulose fibers (24) of the cellulose fiber bundle (26) within the covering material (12) to form a fiber carpet (16);

- Sealing the wrapping material (12) to form a closed bag (62); and

- Applying pressure to the closed bag (62) and the fiber carpet (16) arranged therein to homogenize a distribution of fibers of the fiber carpet (16) in the closed bag (62).

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

3. The 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) by means of at least one rotating loosening rotor (30, 32).

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

5. The method according to any one of the preceding claims, wherein the flat compaction of the cellulose fibers (24) of the cellulose bundle (26) within the casing material (12) takes place by means of a compaction unit (60) which comprises at least two printing units (64) that can be moved relative to one another. The method according to claim 5, wherein the compression unit (60) comprises at least one rotating pressure belt, the distance (63) of which from an opposite surface is changeable so that air escapes from the wrapping material (12) while the distance (63) is reduced. Method according to one of the preceding claims, wherein before the wrapping material (12) is sealed to form a closed bag (62), dust particles are sucked off at a filling opening of the wrapping material (62). Method according to one of the preceding claims, wherein the closed bag (62) is folded and/or creased and/or folded over and glued in such a way that it forms an insulating bag (92) surrounded by the fiber carpet (16). Insulating packaging (10), preferably produced in a method according to one of the preceding claims, comprising:

- a wrapping material (12), comprising a plastic-coated paper layer which forms a closed bag (62) by forming at least one sealing section; and

- a filling which comprises a fiber carpet (16) made of cellulose fibers, the fiber carpet (16) having 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. Insulating packaging (10) according to claim 9, wherein the paper layer comprises a kraft paper, which is preferably coated with a sealable plastic layer. Insulating packaging (10) according to claim 9 or 10, wherein the paper layer has at least one of the following properties:

- comprises an unbleached paper,

- is heat sealable,

- has a water vapor barrier,

- 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 ² , 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), the portioning unit (22) comprising:

- a chamber (28) for holding a defined amount of the cellulose fibers (24);

- a fiber loosening unit (30, 32) for loosening the cellulose fibers (24) and/or the cellulose fiber bundle (26), the fiber loosening unit (30, 32) being arranged in the chamber (28);

- a transport unit (38) for transporting the cellulose fibers (24) and/or the cellulose fiber bundle (26); and

- preferably a stripping device (37) for stripping the cellulose fiber bundle (26);

- a feed unit (44) for feeding the cellulose fibers (24) of the cellulose fiber bundle (26) to a compression area (45),

- wherein the supply unit (44) comprises at least one suction unit (46) which is set up to extract air from the supply unit (44),

- a wrapping material feed device (50) for feeding wrapping material (12), the wrapping material feed device (50) being set up to feed the wrapping material (12) in such a way that it feeds the cellulose fibers (24) fed to the compression area (45) by means of the feed unit (44). ) enveloped;

- a compression unit (60) for compressing the cellulose fibers (24) covered with the covering material (12) in the compression area (45) into a fiber carpet (16), comprising two pressure units (64) that can be moved relative to one another;

- a sealing unit (56, 58) for sealing the wrapping material (12) to form a closed bag (62); and

- a fiber distribution unit (76) for homogenizing a distribution of fibers of the fiber carpet (16) in the covering material (12), which has at least one pressure-exerting element (12) acting on the covering material (12) of the bag (62) and consequently on the fiber carpet (16). 78). 13. Plant according to claim 12, further comprising:

- a shredder for shredding cellulose material;

- a storage container for storing shredded cellulose material; or and

- a defibration machine for defibration of the shredded cellulose material into the cellulose fibers (24).

14. Plant according to claim 12 or 13, further comprising:

- an air transport unit for transporting the cellulose fibers (24) by means of an air stream; or and

- A separation unit for removing air and feeding the cellulose fibers (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 level meter for measuring a level of the cellulose fibers (24) in the chamber (28).

16. Plant 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 control the height of the chamber (28) at least in a defined manner To limit the area 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), the further fiber loosening unit (32) being in the chamber (28) is arranged.

18. Plant according to claims 16 and 17, wherein

- the fiber loosening unit (30) in the transport direction (36) in front of the shut-off element and/or

- The further fiber loosening unit (32) is arranged after 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 blades (39) of which are preferably curved.

20. Plant according to one of claims 12 to 19, wherein the portioning unit (22) further comprises a suction device (42) for suctioning air and suspended matter from the chamber (28), preferably from both chamber sections (29, 34).

21. System 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 set up to suck out air and suspended matter while feeding 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 compression unit (60) comprises at least one vertical pressure belt system (65) which rotates in the transport direction (36) and is designed to move the surface of the wrapping material (12) lying thereon in the transport direction (36). 36) to transport.

23. Plant 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 plant further comprises a compressed air supply unit, which is arranged adjacent to the sealing unit (58), and which is designed to release 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 attached to 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 extends up to 60 cm;

- Is made of plastic or is at least covered or partially covered with plastic, so that only sections of the at least one pressure-exerting element (78) act on the covering material (12), which have a plastic surface; or and

- 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. Plant 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 designed to move the at least one pressure-exerting element (78) and the bag (62) relative to one another move, 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 shaping shoulder (54) for shaping a wrapping material (12) enclosed on at least two sides, the shaping shoulder (54) comprising at least one suction unit.

27. Packaging box (1 18), comprising:

- an insulating packaging (10), preferably according to one of claims 9 to 1 1 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 closed bag (62) by means of at least one sealing section (14), and

- a filling which comprises 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 of 40 cm or more,

- an outer jacket comprising six lateral surfaces and twelve edges (134, 136), which is designed to completely enclose a cuboid inner chamber (124), and

- an insert element (126, 128) which is designed to receive the insulating packaging (10) and insert it together with the insulating packaging (10). Inner chamber (124) to be inserted in such a way that the insert element (126, 128) covers at least a large part of three inner lateral surfaces and two edges (134, 136) of the inner chamber (124),

- wherein the insert element (126, 128) can be folded and/or bent on two sections (130, 132), and

- 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 bendable and/or bendable, the fiber carpet (16) being continuous in its folded and/or bent sections (130, 132).

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