SUSTAINABLY MANUFACTURED MULTILAYER TUBE

Abstract

A first plastic recyclate is used for a tube of a land vehicle, in particular of a road vehicle. The tube comprises a first layer and a second layer, wherein the first layer and the second layer abut against each other. The first layer has the first plastic recyclate, wherein the second layer comprises a first virgin plastic. The first plastic recyclate and the first virgin plastic belong to the same plastic species, for example to the plastic species of polyamides or the plastic species of polyolefins.

Claims

1. Use of a first plastic recyclate for a tube of a land vehicle, wherein the tube comprises a first layer and a second layer, wherein the first layer and the second layer abut against each other, wherein the first layer has the first plastic recyclate, wherein the second layer comprises a first virgin plastic, wherein the first plastic recyclate and the first virgin plastic belong to the same plastic species.

2. The use according to claim 1, wherein the first plastic recyclate and the first virgin plastic belong to the same plastic grade.

3. The use according to claim 1, wherein the share of the layer thickness of the first layer in relation to the combined total thickness of the first layer and the second layer measures at most 90% or 80% or 75%.

4. The use according to claim 1, wherein the second layer has a layer thickness of at most 0.5 mm or 0.4 mm or 0.35 mm.

5. The use according to claim 1, wherein the layer thickness of the first layer measures at least 10% or 15% or 20% in relation to the total wall thickness of the tube.

6. The use according to claim 1, wherein the molar mass distribution of the first plastic recyclate or the first layer is broader than that of the first virgin plastic and/or the second layer.

7. The use according to claim 1, wherein the percentage by weight of the first plastic recyclate in the first layer measures at least 70% or 90% or 95%.

8. The use according to claim 1, wherein the percentage by weight of the first virgin plastic in the second layer measures at least 70% or 90% or 95%.

9. The use according to claim 1, wherein the first layer has a darker color than the second layer, wherein the first layer preferably has a gray shade which is located in the darker half of an accompanying color table.

10. The use according to claim 1, wherein industrial plastic residues are used for the first plastic recyclate.

11. The use according to claim 1, wherein the first plastic recyclate and the first virgin plastic belong to the plastics species of the polyamides, the polyolefins, or the plastics species of thermoplastic elastomers.

12. The use according to claim 1, wherein the tube has an additional layer, wherein the additional layer comprises a second virgin plastic, wherein the second virgin plastic belongs to the same plastic species as the first plastic recyclate.

13. The use according to claim 1, wherein the tube comprises a further layer, wherein the further layer has a second plastic recyclate.

14. The use according to claim 1, wherein the tube comprises a second virgin layer, wherein the second virgin layer has an additional virgin plastic.

15. The use according to claim 1, wherein the land vehicle is an electric vehicle, and wherein the tube is used as a cooling means for a battery of the electric vehicle.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The disclosure will be described in more detail below based upon four exemplary embodiments in four schematically designed figures. Shown on:

[0034] FIG. 1 is a first exemplary embodiment in cross section with five layers,

[0035] FIG. 2 is a second exemplary embodiment in cross section with six layers,

[0036] FIG. 3 is a third exemplary embodiment in cross section with five layers,

[0037] FIG. 4 is a fourth exemplary embodiment in cross section with six layers.

DETAILED DESCRIPTION

[0038] FIG. 1 shows a first exemplary embodiment of the disclosure in the form of a tube 1, which is illustrated in cross section. The tube 1 in this exemplary embodiment comprises a total of five layers. A first layer 2 comprises a first plastic recyclate, wherein the first plastic recyclate in this exemplary embodiment consists of PA12. The first layer 2 can be surrounded by a second layer 3, which comprises a first virgin plastic. The first virgin plastic of the second layer 3 in this exemplary embodiment consists of PA12. The first layer 2 in this exemplary embodiment encloses an adhesion-promoting layer 7 for optimized adhesion to a layer A2. For example, the layer A2 can have a polypropylene. The layer A2 can on its part enclose an innermost layer A1. For example, the innermost layer A1 can comprise a thermoplastic elastomer.

[0039] The tube 1 in the second exemplary embodiment according to FIG. 2 comprises a first layer 2, which has a first plastic recyclate. The first plastic recyclate in this exemplary embodiment preferably consists of a polypropylene, and especially preferably of an isotactic polypropylene. The tube 1 in the second exemplary embodiment comprises a second layer 3, which has a first virgin plastic. The first virgin plastic in this exemplary embodiment preferably consists of a polypropylene, and especially preferably of an isotactic polypropylene. In this exemplary embodiment, the second layer 3 is arranged around the first layer 2. The first layer 2 on its part encloses an additional layer 4. The additional layer 4 comprises a second virgin plastic, wherein the second virgin plastic in this exemplary embodiment consists of a polypropylene, in particular an isotactic polypropylene. Finally, the additional layer 4 can enclose an innermost layer B1, which preferably has a thermoplastic elastomer. It is possible that the second layer 3 be enclosed by a layer B2. The layer B2 in this exemplary embodiment can comprise an adhesion promoter. In this exemplary embodiment, an outermost layer B3 encloses the layer B2. The layer B3 can have a polyamide, in particular PA11 or PA12.

[0040] The third exemplary embodiment of a tube 1 illustrated on FIG. 3 comprises a total of five layers. A first layer 2 has a first plastic recyclate, which preferably consists of a polypropylene, in particular isotactic polypropylene. In this initial example, a second layer 3 encloses the first layer 2, and comprises a first virgin plastic. The first virgin plastic in this exemplary embodiment can consist of a polypropylene, in particular an isotactic polypropylene. It is possible that the second layer 3 be enclosed by a further layer 5. The further layer 5 preferably comprises a second plastic recyclate, which in this exemplary embodiment consists of a thermoplastic vulcanizate, preferably an EPDE/PP-based TPV. It is preferred that the further layer 5 be enclosed by a second virgin layer 6. The second virgin layer 6 advantageously comprises an additional virgin layer, which preferably consists of a thermoplastic vulcanizate, preferably an EPDM/PP-based TPV. In this third exemplary embodiment, the second virgin layer 6 forms the outermost layer of the tube 1. It is possible that the first layer 2 enclose an innermost layer C1. For example, the innermost layer C1 can have a thermoplastic vulcanizate.

[0041] The fourth exemplary embodiment of the disclosure illustrated on FIG. 4 shows a tube 1 in cross section, which has a total of six layers. A first layer 2 comprises a first plastic recyclate, which in this exemplary embodiment comprises a thermoplastic elastomer. For example, the thermoplastic elastomer of the first layer 2 can be EPDM. In this exemplary embodiment, the first layer 2 encloses a second layer 3, which can at the same time also be the innermost layer. The second layer 3 can comprise a first virgin plastic, wherein the first virgin plastic is preferably a thermoplastic elastomer, and in particular an EPDM. In this exemplary embodiment, the first layer 2 is enclosed by an adhesion-promoting layer 7, which on its part is surrounded by a further layer 5. The further layer 5 preferably comprises a second plastic recyclate. The second plastic recyclate preferably consists of a thermoplastic vulcanizate. The further layer 5 is advantageously enclosed by a second virgin layer 6, wherein the second virgin layer 6 can have an additional virgin plastic. The additional virgin plastic preferably consists of a thermoplastic vulcanizate.

[0042] The exemplary embodiments enumerated above are preferably used for application in motor vehicles. The tubes 1 in the four mentioned exemplary embodiments are especially preferably used for transporting a coolant in a motor vehicle, so that cooling tubes are expediently involved. It is very preferred that the cooling tubes be used for cooling batteries in electric vehicles. For example, the cooling medium transported in the cooling tubes can be a water-glycol liquid.