DE102024101800A1 - Polyethylene-based arrangement - Google Patents

Abstract

The invention relates to a polyethylene-based arrangement (8) for the storage of grain, silage, and warm or wet industrial products, comprising at least one outer layer (1), at least one inner layer (7), and at least one first polyamide barrier layer (3). The arrangement (8) comprises at least one further polyamide barrier layer (5), with at least one functional layer (4) arranged between the first barrier layer (3) and the further barrier layer (5). The polyamide is designed as a copolyamide PA 6/6.6 with a melting point according to DIN EN ISO 11357 of less than 180°C.

Description

The invention relates to a polyethylene-based arrangement for the storage of grain, silage, warm or wet industrial products, comprising at least one outer layer, at least one inner layer and at least one first barrier layer made of polyamide.

Tubular film ensiling is an efficient, flexible, and environmentally friendly technology for preserving and storing all types of feed or wet industrial products in a specially designed tubular film. Originally developed for the ensiling of green waste, today a wide variety of substrates can be stored in silo tubes. Silo tubes are also used for composting organic material. For example, pressed pulp, corn, and grass silage are also stored in silo tubes.

A typical silo hose consists of at least two layers and is approximately 120 m long and has a diameter of 5 m. Accordingly, high demands are placed on a silo hose in terms of tensile strength and puncture resistance.

To fill the silo bags, special machines are required, which usually first crush the stored material and then press it into the bags. DE 10 2010 046 183 A1 describes such a device.

Sealing against oxygen is crucial for silage. Traditionally, sturdy polyethylene-based films were used for silage bags. However, the use of these conventional films has repeatedly led to mold growth due to oxygen penetration.

Conventional polyolefin-based films for silo hoses would have to be very thick to ensure sufficient oxygen impermeability and would therefore be heavy and relatively expensive to produce.

For this reason, films with special barrier configurations have been developed for silo bags. These barrier configurations are polymers that exhibit particularly high impermeability to gases, especially oxygen.

The DE 698 17 012 T2 Describes a multilayer film for agricultural silage products. The film has a polyamide layer that acts as an oxygen barrier. The film product can consist of two or more, e.g., coextruded layers, of which at least one or possibly several layers consist of an insulating plastic layer. In the case of a multilayer film with at least two insulating layers, these insulating layers can be made of the same plastic or of different plastics, all of which are airtight.

DE 10 2009 052 948 B4 describes a covering system for silage with a base film made of a polyamide and a silage film made of a polyethylene.

The DE 10 2017 107 060 A1 discloses a method for increasing the tear resistance of a multilayer film. The multilayer film comprises at least one barrier arrangement with a total thickness to reduce gas permeability. According to the invention, the barrier arrangement is divided into at least two layers to increase the tear resistance.

As part of its "Green Deal," the European Union aims to reduce the amount of plastic waste going to landfills. The goal is to recycle 55% of plastic packaging waste by 2030. This poses entirely new challenges for the production and design of silo bags, hoses, and films.

To meet the challenges of recycling, packaging design must become increasingly sustainable. This can be achieved, for example, by implementing more mono-material constructions. The challenge here lies in achieving the previously known barrier effect with only a recyclable mono-material construction of a silage wrap.

In addition, the silo hose must also be able to achieve the mechanical properties achieved so far. Otherwise, the silo hoses could burst during filling or tear during transport.

The object of the present invention is to provide a polyethylene-based assembly that meets the requirements of the Plastics Pact 2025 and is fully recyclable. The polyethylene-based assembly should also be suitable for the packaging and storage of grain, silage, and warm or wet industrial products. Furthermore, the polyethylene-based assembly should be able to exhibit the mechanical properties achieved to date.

According to the invention, this object is achieved by a polyethylene-based arrangement, a method and a use according to the subordinate Main claims are solved. Preferred embodiments emerge from the subclaims, the description, the exemplary embodiment, and the drawing.

According to the invention, the arrangement comprises at least one further barrier layer made of polyamide, wherein at least one functional layer is arranged between the first barrier layer and the further barrier layer, wherein the polyamide is designed as a copolyamide PA 6/6.6 with a melting point according to DIN EN ISO 11357 of less than 180 °C.

DIN EN ISO 11357 is a standard for determining the thermal properties of plastics, including melting and softening temperatures, specific heat capacity, thermal conductivity, and other heat transfer properties. The standard specifies various methods for thermal analysis, including differential scanning calorimetry (DSC), thermogravimetry (TG), dynamic mechanical analysis (DMA), and other methods. These methods enable the characterization of the temperature dependence of various thermal properties.

The polyethylene-based arrangement can be designed, for example, as a silo bag, silo hose, silo planer or as a silo tarpaulin.

The polyamides used for silo films typically have melting points above 220 °C. Special polyamides, for example, have melting points of 207 °C. However, these temperatures are still too high to recycle the silo films, which preferably consist of a high polyethylene content, after their intended use. Polyamides with high melting points result in low bubble stability and high mold temperatures, which adversely affect the mechanical properties of the resulting products.

In a particularly advantageous embodiment of the invention, the polyamide of the barrier layer has a melting point of less than 179 °C according to DIN EN ISO 11357. This previously unattained low melting point of a polyamide component results in a polyethylene-based arrangement, especially for silo hoses, which can be excellently recycled according to the task.

The thickness of the barrier layers is, for example, more than 5µ m and less than 20µ m. This means that the barrier layer is particularly thin and saves material, but still has excellent barrier properties.

In the embodiment with two barrier layers, for example, the film has similar individual thicknesses, the deviation being a maximum of 20%, preferably a maximum of 10%, in particular a maximum of 5%.

In a variant of the invention, the barrier layers have the same thickness.

In addition, the proportion of the barrier layer is less than 5% by weight of the polyethylene structure and thus fully complies with the European Union's requirements for the recyclability of plastic films.

In particular, the low melting point of the polyamide in the barrier layers results in a recyclate of the polyethylene arrangement that, due to the overall lower melting point, is better suited for all processes that enable valuable reuse of the recyclate.

For example, the polyamide of the barrier layer has a density according to ISO 1183-1 of more than 1.08 g/cm ³ , preferably more than 1.10 g/cm ³ and/or less than 1.20 g/cm ³ , preferably less than 1.16 g/cm ³ .

In a variant of the invention, the polyamide of the barrier layer has a breaking strength of more than 80 MPa, preferably more than 100 MPa and/or less than 200 MPa, preferably less than 160 MPa.

The polyethylene-based assembly, for example, has a seven-layer structure. The functional layer in the middle is surrounded by a barrier layer and another barrier layer.

According to the invention, the barrier layers of the film are divided. Surprisingly, it was found that dividing the barrier layers significantly improves the mechanical properties of the polyethylene-based assembly while maintaining high oxygen impermeability without increasing the film thickness.

In a variant of the invention, the tear strength of the polyethylene-based assembly is increased by a factor of 1.5, preferably by a factor of 2, in particular by a factor of 2.5. This is particularly important for silo hoses.

This creates a polyethylene-based assembly that, with high oxygen impermeability and flexible behavior, also has high tear resistance, so that unwanted bursting or tearing is prevented and at the same time only a relatively small thickness of the assembly is required. Polyethylene base is required, so that the silo hose according to the invention is relatively light.

For example, the functional layer consists of at least 60 wt.% LLDPE with an MFI of more than 0.8 and at least 5 wt.% maleic anhydride-grafted concentrate. This simultaneously ensures enormous tear resistance and ensures the bond to the two barrier layers.

In a variant of the invention, the proportion of LLDPE in the functional layer is more than 70 wt.% and less than 90 wt.%.

For example, the proportion of a maleic anhydride-grafted concentrate in the functional layer is more than 10 wt.% and less than 20 wt.%

For example, the functional layer contains a proportion of LLDPE whose density according to ISO 1183-1 is more than 0.918 g/cm ³ and less than 0.922 g/cm ³ and whose MFI (at 190 °C and 5 kg) according to ISO 1133-1 is more than 0.9 g/10 min and less than 1.1 g/10 min.

For example, the functional layer contains a proportion of a maleic anhydride-grafted concentrate whose density according to ISO 1183-1 is more than 0.919 g/cm ³ and less than 0.921 g/cm ³ and whose MFR (at 190 °C and 5 kg) according to ISO 1133-1 is more than 0.1 g/10 min and less than 0.5 g/10 min.

The flow behavior of polyolefins is described by the melt flow rate, or MFI, according to ISO 1133-1, typically at a temperature of 190 °C for polyethylene and 230 °C for polypropylene at a load of 2.16 kg, 5 kg, or 21.6 kg. A higher melt index correlates with a lower average molecular weight of the polymer. The higher the melt index of a polymer, the lower the melt viscosity, which is beneficial for high output of the extrusion system. On the other hand, polymers with a high molecular weight, i.e., a low melt index, are advantageous in terms of mechanical stability, especially tensile strength or toughness.

In a variant of the invention, the intermediate layers are arranged between the first barrier layer and the outer layer and the further barrier layer and the inner layer, wherein the intermediate layers consist of at least 40 wt.% of an mLLDPE and at least 15 wt.% of an LDPE, wherein the MFI of the mLLDPE and the LDPE is below 0.3.

The production of LLDPE is initiated by transition metal catalysts, particularly Ziegler- or Philips-type catalysts. The actual polymerization process can be carried out either in the solution phase or in gas-phase reactors. Typically, octene is the comonomer in the solution phase, while butene and hexene are copolymerized with ethylene in a gas-phase reactor. LLDPE has higher tensile strength and higher impact and puncture resistance than LDPE. It is very flexible and expands under load. It can be used to produce thinner films that have better resistance to stress cracking. It has good resistance to chemicals. It has good electrical properties. However, it is not as easy to process as LDPE, has lower gloss, and a narrower heat-sealing range.

In a variant of the invention, the proportion of mLLDPE in the intermediate layer is more than 50 wt% and less than 70 wt%.

The proportion of LDPE in the intermediate layer is, for example, more than 10 wt% and less than 30 wt%.

For example, the proportion of a maleic anhydride-grafted concentrate in the intermediate layer is more than 10 wt% and less than 20 wt%.

In a variant of the invention, the intermediate layer comprises a proportion of mLLDPE whose density according to ISO 1183-1 is more than 0.918 g/cm ³ and less than 0.924 g/cm ³ and whose MFI (at 190 °C and 5 kg) according to ISO 1133-1 is more than 0.1 g/10 min and less than 0.28 g/10 min.

For example, the intermediate layer contains a proportion of LDPE whose density according to ISO 1183-1 is more than 0.919 g/cm ³ and less than 0.923 g/cm ³ and whose MI (at 190 °C and 5 kg) according to ISO 1133-1 is more than 0.1 g/10 min and less than 0.29 g/10 min.

In a variant of the invention, the outer layer and the inner layer consist of at least 50 wt.% of an mLLDPE with an MFI of less than 0.6 and at least 15 wt.% of LLDPE with an MFI of more than 0.8.

The proportion of mLLDPE in the outer layer and/or the inner layer is, for example, more than 55 wt.% and less than 80 wt.%. The proportion of mLLDPE in the outer layer and/or the inner layer advantageously increases the stability of the silage tube.

For example, the outer layer and/or the inner layer contain a proportion of LLDPE. The proportion of LLDPE significantly increases the tear resistance of the outer layer and/or the inner layer. For example, the proportion of LLDPE in the outer layer and/or the inner layer is more than 15% by weight and/or less than 35% by weight.

In a variant of the invention, the outer and/or the inner layer comprises a proportion of mLLDPE whose density according to ISO 1183-1 is more than 0.920 g/cm ³ and less than 0.922 g/cm ³ and whose MFR (at 190 °C and 5 kg) according to ISO 1133-1 is more than 0.3 g/10 min and less than 0.55 g/10 min.

For example, the outer and/or inner layer contains a proportion of LLDPE whose density according to ISO 1183-1 is more than 0.918 g/cm ³ and less than 0.922 g/cm ³ and whose MI (at 190 °C and 5 kg) according to ISO 1133-1 is more than 0.85 g/10 min and less than 1.5 g/10 min.

The water vapor permeability of dry or moisture-sensitive goods is determined using a gravimetric measurement method according to DIN 53116 or ASTM D6701-01. A test container filled with a desiccant is sealed with a film sample and exposed to a defined test climate. The amount of water penetrating the sample is determined by weighing. A water quantity in the range of 1 - 200 g/(m ² - d) can be detected. The detection limit also depends on the composition and thickness of the sample.

In a variant of the invention, the polyethylene-based arrangement has a water vapor permeability of less than 50 g/m ² , preferably less than 25 g/m ² , in particular less than 10 g/m ² in 24 hours according to ASTM D6701-01. This makes the storage of grain, silage, and warm or wet industrial products particularly advantageous, with the silage being coated for a particularly long time.

For a silo bag to fulfill its purpose, it must have a certain level of oxygen impermeability. This is the only way to ensure adequate fermentation during silage, for example, in silo bags, or chemical impermeability in disinfection films.

For example, the polyethylene-based assembly has an oxygen permeability of less than 100 cm ³ /m ² d bar, preferably less than 60 cm ³ /m ² d bar, in particular less than 30 cm ³ /m ² d bar at 23 °C and 50% relative humidity according to ASTM D3985.

The Elmendorf test according to DIN 53128 determines the average force in grams or mN required to tear a sample after the onset of the tearing process. During the test, one or more layers of the film are torn over a defined distance using a pendulum. The force exerted during tearing is measured by the loss of potential energy of the pendulum.

In a variant of the invention, the polyethylene-based arrangement has a tensile strength in the machine direction according to Elmendorf DIN 53128 of more than $20\frac{g}{\mathrm{\mu }m},$ preferably more than $25\frac{g}{\mathrm{\mu }m},$ especially more than $30\frac{g}{\mathrm{\mu }m}.$ This optimally prepares the silo hose for the stress during the filling process and effectively prevents the silo hose from slipping.

Puncture resistance is determined according to JAS P1019, with a polyethylene-based test specimen clamped in a specimen holder. The clamping device is designed so that the inner diameter is 10 mm. A probe with a rounded tip penetrates the test specimen at a constant speed. The force and strain required for puncture are determined.

The polyethylene-based arrangement, for example, has a puncture resistance according to JAS P1019 of more than 15 mJ, preferably more than 20 mJ, and especially more than 25 mJ. This means that the silo film also withstands the demands of filling the silo hose very well.

The polyethylene-based assembly has a tensile strength in MD according to ASTM 1922 of more than 300 kN/m, preferably more than 400 kN/m, and especially more than 500 kN/m. This makes the silo hose particularly tear-resistant during filling, transport, and storage.

The polyethylene-based assembly has a tear strength in CD according to ASTM 1922 of more than 300 kN/m, preferably more than 400 kN/m, in particular more than 500 kN/m

The polyethylene-based assembly has a Spencer puncture energy according to ASTM 3420 of more than 2000 mJ, preferably more than 2350 mJ, and especially more than 2700 mJ. The special construction and specially selected raw materials result in a film for silo hoses that can withstand the enormous mechanical stresses that occur during filling or clogging of the hose.

The special physical parameters of the silo hose are achieved by the selection and combination of suitable raw materials, whereby the structure of the silo hose in particular plays a decisive role in achieving the properties.

The silo hose, for example, has a seven-layer structure.

In another variant, the polyethylene-based arrangement has a five-layer structure, whereby, in contrast to the seven-layer variant, the outer and inner layers are not each formed as a double layer.

A version with nine layers is also conceivable.

In one variant of the invention, the outer layer contains a proportion of titanium dioxide TiO ₂ . This is preferably coated TiO ₂ . Due to the titanium dioxide content, the outer layer is white, which allows for excellent reflection of sunlight and thus excellent protection of the silage material.

For example, the titanium dioxide is integrated into a white polybatch. In one variant of the invention, the outer layer has a white polybatch content of more than 5 wt.% and less than 20 wt.%.

In a further variant of the invention, the intermediate layers also have a proportion of white polybatch with titanium dioxide, the proportion in the intermediate layer being more than 5 wt.% and less than 20 wt.%.

The functional layer, for example, also contains a proportion of white polybatch with titanium dioxide, with the proportion in the intermediate layer being more than 5 wt% and less than 20 wt%.

Opacity is the opposite of transparency. It is a measure of opacity or lack of transparency and is usually expressed as a percentage. For example, the opacity of a completely opaque film is 100%, and a completely or fully transparent film has an opacity of 0%.

For example, the outer layer or the polyethylene-based arrangement has a light opacity of more than 45%, preferably more than 60%, in particular more than 75%, according to DIN 53416. This advantageously reflects high-energy solar radiation, thus effectively protecting the contents of the silo bag.

In a variant of the invention, the inner layer contains a proportion of a black pigment.

For example, the inner layer also contains a proportion of black polybatch, with the proportion in the inner layer being more than 5 wt% and less than 20 wt%.

A particularly advantageous embodiment of the invention is a relatively thin film which, despite its small thickness, has sufficient tear resistance and, at the same time, high oxygen barrier properties.

It proves to be advantageous if the thickness of the polyethylene-based arrangement is less than 400 µm, preferably less than 350 µm, in particular less than 300 µm and/or more than 50 µm, preferably more than 75 µm, in particular more than 100 µm.

This provides silo hoses that combine high oxygen impermeability with flexible behavior and high tear resistance, thus preventing unwanted bursting or tearing. At the same time, only a relatively small multilayer film thickness is required, making the polyethylene-based arrangement according to the invention relatively lightweight. Furthermore, the polyethylene-based embodiment of the arrangement according to the invention represents the first version of a variant that is also considered recyclable according to the new European Union specifications and, due to the low melting point of the polyamide, has also proven itself in practical recycling applications.

According to the invention, a polyethylene-based assembly is produced by a process in which an outer layer of polyethylene, two barrier layers of polyamide, a functional layer, two intermediate layers and an inner layer of polyethylene are produced by coextrusion, wherein the extrusion temperature at the nozzle of the barrier layer is less than 200 °C.

Extruders for blown film coextrusion are typically arranged in a ring around the blowing ring. The raw material, usually plastic granules or powder, is fed into the hopper. The hopper ensures that the material is fed evenly into the extruder. The extruder screw is the central element of the extruder and is driven by an electric motor in the extrusion barrel. The screw is helical and rotates to melt and convey the plastic material. The screw is divided into different zones, with the temperature increasing zone by zone from the hopper to the die. For this purpose, the extrusion barrel is designed as a heated vessel with multiple heated zones to ensure precise temperature control along the extruder screw. The die is located at the end of the extrusion barrel. This is where the molten plastic strand is formed before being fed into the blow ring. In the blow ring, the molten plastic strand is blown into a flat tube, which is then inflated into a bubble. The blow ring is temperature-controlled to control the temperature of the molten film. After bubble formation, the film passes through a cooling section where cooling air streams or water sprays are used to lower the temperature and stabilize the film. The pulling device pulls the extruded film away from the bubble, ensuring uniform thickness and width. This process determines the final mechanical properties of the polyethylene assembly. The finished polyethylene-based assembly is wound up on a winder.

In a variant of the invention, the difference between the temperatures of the extruder nozzles for the extrusion of the inner and outer layers and the barrier layer is less than 70 °C.

The special temperature control and regulation results in a polyethylene-based arrangement which is advantageously recyclable due to its properties, in particular its melting temperature and its almost pure design.

According to the invention, the polyethylene-based arrangement is used as a reusable silo hose for the storage of grain, silage, warm or wet industrial products.

Further features and advantages of the invention will become apparent from the description of embodiments.

Example 1:

• 20 Volumenprozent Außenschicht
• 17 Volumenprozent Zwischenschicht
• 10 Volumenprozent Barriereschicht
• 6 Volumenprozent Funktionsschicht
• 10 Volumenprozent Barriereschicht
• 17 Volumenprozent Zwischenschicht
• 20 Volumenprozent Innenschicht

The external embodiment 1 has the following structure of the individual layers:

• 20 volume percent outer layer
• 17 volume percent interlayer
• 10 volume percent barrier layer
• 6 volume percent functional layer
• 10 volume percent barrier layer
• 17 volume percent interlayer
• 20 volume percent inner layer

Table 1 shows a seven-layer polyethylene-based assembly, with the mechanical parameters of the film listed in the right column. Thickness (µm) 100 Tear load (N) MD TD 39.8 >50 Tensile strength (kN/m) MD TD >400 >400 Spencer penetration force (mJ) 2715 OTR (cc/m ² - d) 45

Further advantages and features of the invention will become apparent from the description of an embodiment with reference to the drawings and from the drawings themselves.

• eine schematische Darstellung der Anordnung auf Polyethylenbasis.

In this context

• a schematic representation of the polyethylene-based arrangement.

shows a polyethylene-based arrangement 8 with seven layers for a silo hose.

In this embodiment, the outer layer 1 consists of a proportion of mLLDPE, wherein the outer layer 1 consists of 61 wt.% of an mLLDPE with a melting temperature of 113°C and the MFI of the mLLDPE is 0.45. In addition, the outer layer 1 contains a proportion of LLDPE, wherein the outer layer 1 comprises 25 wt.% of an LLDPE with a melting temperature of 119°C and the MFI of the LLDPE is 1.0. The outer layer 1 also contains a proportion of white masterbatch, wherein the outer layer 1 comprises 7 wt.% of a white masterbatch and the MFI of the white masterbatch is 15.0. In addition, the outer layer 1 contains additives and flow aids in an amount of 6 wt.%.

Intermediate layers 2 and 6 consist of a proportion of LDPE, with intermediate layers 2 and 6 consisting of 53.5 wt.% of an LDPE with a melting temperature of 116 °C and the MFI of the LDPE being 0.27. In addition, intermediate layers 2 and 6 have a proportion of another LDPE, with intermediate layers 2 and 6 consisting of 20 wt.% of an LDPE and the MFI of the LDPE being 0.25. Intermediate layers 2 and 6 also contain a proportion of white masterbatch, with intermediate layers 2 and 6 containing 12 wt.% of a white masterbatch and the MFI of the white masterbatch being 15.0. The proportion of a maleic anhydride-grafted concentrate in intermediate layers 2 and 6 is 10 wt.%, with the MFI of the maleic anhydride-grafted concentrate being 0.3. In addition, the intermediate layers contain 2 and 6 additives and flow aids in the amount of 4 wt.%.

The barrier layers 3 and 5 consist of a copolyamide PA 6/6.6, the melting point of the copolyamide PA 6/6.6 being 179 °C.

Functional layer 4 consists of a proportion of LLDPE, wherein functional layer 4 consists of 76.5 wt.% of an LLDPE with a melting temperature of 119°C and the MFI of the LLDPE is 1.0. Functional layer 4 also contains a proportion of white masterbatch, wherein functional layer 4 consists of 8 wt.% of a white masterbatch and the MFI of the white masterbatch is 1.0. In addition, functional layer 4 contains additives and flow aids amounting to 3.5 wt.%. The proportion of a maleic anhydride-grafted concentrate in functional layer 4 is 10 wt.%, wherein the MFI of the maleic anhydride-grafted concentrate is 0.3.

The inner layer 7 consists of a proportion of mLLDPE, wherein the inner layer 7 consists of 63.5 wt.% of an mLLDPE with a melting temperature of 113°C and the MFI of the mLLDPE is 0.45. In addition, the inner layer 7 contains a proportion of LLDPE, wherein the inner layer 7 consists of 25 wt.% of an LLDPE with a melting temperature of 119°C and the MFI of the LLDPE is 1.0. The inner layer 7 also contains a proportion of black masterbatch, wherein the inner layer 7 contains 8 wt.% of a black masterbatch and the MFI of the black masterbatch is 15.0. In addition, the inner layer 7 contains additives and flow aids in an amount of 4 wt.%.

QUOTES CONTAINED IN THE DESCRIPTION

This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10 2010 046 183 A1 [0004]
• DE 698 17 012 T2 [0008]
• DE 10 2009 052 948 B4 [0009]
• DE 10 2017 107 060 A1 [0010]

Claims (15)

Polyethylene-based arrangement (8) for the storage of grain, silage, warm or wet industrial products, consisting of: - at least one outer layer (1) - at least one inner layer (7) - at least one first barrier layer made of polyamide (3), characterized in that the arrangement (8) comprises at least one further polyamide barrier layer (5), wherein at least one functional layer (4) is arranged between the first barrier layer (3) and the further barrier layer (5), wherein the polyamide is designed as a copolyamide PA 6/6.6 with a melting point according to DIN EN ISO 11357 of less than 180 °C. Polyethylene-based arrangement according to Claim 1 , characterized in that intermediate layers (2, 6) are arranged between the first barrier layer (3) and the outer layer (1) and the further barrier layer (5) and the inner layer (7), wherein the intermediate layers (2, 6) consist of at least 40 wt.% of an mLLDPE and at least 15 wt.% of an LDPE, wherein the MFI of the mLLDPE and the LDPE is below 0.3. Polyethylene-based arrangement according to Claim 1 or 2 , characterized in that the outer layer (1) and the inner layer (7) comprise at least 50 wt.% of an mLLDPE with an MFI of less than 0.6 and at least 15 wt.% of LLDPE with an MFI of more than 0.8. Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the functional layer (4) comprises at least 60 wt.% of an LLDPE with an MFI of more than 0.8 and at least 5 wt.% of a maleic anhydride-grafted concentrate type. Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the polyethylene-based arrangement (8) has a water vapor permeability of less than 50 g/m ² , preferably less than 25 g/m ² , in particular less than 10 g/m ² in 24 h according to ASTM D6701-01. Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the polyethylene-based arrangement (8) has an oxygen permeability of less than 100 cm /m ³² d bar, preferably less than 60 cm /m ³² d bar, in particular less than 30 cm /m ³² d bar according to ASTM D3985. Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the polyethylene-based arrangement (8) has a puncture energy according to JAS P1019 of more than 15 mJ, preferably more than 20 mJ, in particular more than 25 mJ. Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the polyethylene-based arrangement (8) has a tear strength in MD according to ASTM 1922 of more than 300 kN/m, preferably more than 400 kN/m, in particular more than 500 kN/m. Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the polyethylene-based arrangement (8) has a tear strength in CD according to ASTM 1922 of more than 300 kN/m, preferably more than 400 kN/m, in particular more than 500 kN/m. Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the polyethylene-based arrangement (8) has a Spencer puncture energy according to ASTM3420 of more than 2000 mJ, preferably more than 2350 mJ, in particular more than 2700 mJ. Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the polyethylene-based arrangement (8) has a tensile strength in the machine direction and/or cross-machine direction according to Elmendorf DIN 53128 of more than $20\frac{g}{\mathrm{\mu }m},$ preferably more than $25\frac{g}{\mathrm{\mu }m},$ especially more than $30\frac{g}{\mathrm{\mu }m}.$ Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the outer layer (1) has an opacity according to DIN 53416 of more than 45%, preferably more than 60%, in particular more than 75%. Polyethylene-based arrangement according to at least one of the preceding claims, characterized in that the polyethylene-based arrangement (8) has a thickness of less than 400 µm, preferably less than 350 µm, in particular less than 300 µm and/or more than 50 µm, preferably more than 80 µm, in particular more than 100 µm. Method for producing a polyethylene-based assembly (8), comprising the following steps: - extrusion of an outer layer (1) made of a polyethylene, - extrusion of a barrier layer (3, 5) made of a polyamide, - extrusion of an inner layer (7) made of a polyethylene, characterized in that the extrusion temperature at the nozzle of the barrier layer (3, 5) is less than 200 °C. Use of a polyethylene-based arrangement (8) according to one of the Claims 1 until 13 as a reusable silo hose for the storage of grain, silage, warm or wet industrial products.