COOLANT HOSE

Abstract

The invention relates to a refrigerant hose which has at least the following layer structure: an interior layer (A) which acts as barrier layer and which is composed of at least two plies (A1, A2), wherein at least one ply (A1) is constructed from an elastomer-modified EVOH or a polyolefin-modified EVOH or of a combination of an elastomer-modified EVOH and a polyolefin-modified EVOH, and at least one reinforcement layer (B) and an exterior layer (C) which is composed of at least one elastomeric material.

Claims

1.-6. (canceled)

7. A refrigerant hose comprising: an interior layer (A) which acts as barrier layer and which is composed of at least two plies (A1, A2), wherein at least one ply (A1) is constructed from an elastomer-modified EVOH, a polyolefin-modified EVOH, or a combination of the elastomer-modified EVOH and the polyolefin-modified EVOH; at least one reinforcement layer (B); and, an exterior layer (C) which is composed of at least one elastomeric material.

8. The refrigerant hose as claimed in claim 7, wherein the interior layer (A) consists of two layers (A1, A2).

9. The refrigerant hose as claimed in claim 7, wherein the interior layer (A) consists of three layers (A1, A2, A3).

10. The refrigerant hose as claimed in claim 7, wherein the ethylene content in EVOH present in the elastomer-modified EVOH and/or the polyolefin-modified EVOH is between 10 and 44 mol %.

11. The refrigerant hose as claimed in claim 7, wherein the elastomer content in the elastomer-modified EVOH comprises a compatible elastomer.

12. The refrigerant hose as claimed in claim 11, wherein the compatible elastomer is a nonpolar elastomer.

13. The refrigerant hose as claimed in claim 7, wherein the elastomer content in the elastomer-modified EVOH consists of a compatible elastomer.

14. The refrigerant hose as claimed in claim 13, wherein the compatible elastomer is a nonpolar elastomer.

15. The refrigerant hose as claimed in claim 7, wherein the at least one reinforcement layer (B) is two reinforcement layers (B1, B2).

16. The refrigerant hose as claimed in claim 15 further comprising an additional intermediate layer (D) between the two reinforcement layers (B1, B2).

17. The refrigerant hose as claimed in claim 15, wherein the two reinforcement layers (B1, B2) are spiralized reinforcement layers.

18. The refrigerant hose as claimed in claim 15, wherein the interior layer (A) consists of three layers (A1, A2, A3).

19. The refrigerant hose as claimed in claim 15, wherein the interior layer (A) consists of two layers (A1, A2).

20. The refrigerant hose as claimed in claim 7, wherein the hose consists of the interior layer (A) which consists of three layers (A1, A2, A3), the at least one reinforcement layer (B) which consists of one reinforcement layer, and the exterior layer (C).

21. The refrigerant hose as claimed in claim 7, wherein the hose consists of the interior layer (A) which consists of two layers (A1, A2), the at least one reinforcement layer (B) which consists of one reinforcement layer, and the exterior layer (C).

22. The refrigerant hose as claimed in claim 7, wherein an innermost ply (A1) of the of the at least two plies (A1, A2) comprises polyamide.

23. The refrigerant hose as claimed in claim 7, wherein the interior layer (A) consists of three plies (A1, A2, A3), and wherein embedded between an innermost ply (A2) and an outermost ply (A3) is a thermoplastic ply (A1).

24. The refrigerant hose as claimed in claim 23, wherein the thermoplastic ply (A1) comprises polyamide.

25. The refrigerant hose as claimed in claim 23, wherein the at least one reinforcement layer (B) is at least one braided reinforcement layer.

26. The refrigerant hose as claimed in claim 23, wherein the at least one reinforcement layer (B) is two spiralized reinforcement layers (B1, B2) having an additional intermediate layer disposed therebetween.

Description

DIAGRAMS

[0038] FIG. 1 shows a refrigerant hose in the form of a veneer hose of the prior art with a braided reinforcement layer B, a two-ply structure of the internal layer A, where the thermoplastic ply A1 of the internal layer A consists of polyamide and, as barrier ply, forms the innermost ply of the internal layer A, and with a further second ply A2 of the internal layer A, and with an exterior layer C.

[0039] FIG. 2 shows a refrigerant hose in the form of a veneer hose of the prior art with two spiralized reinforcement layers B1, B2, a two-ply structure of the internal layer A, where the thermoplastic ply A1 of the internal layer A consists of polyamide and, as barrier ply, forms the innermost ply of the internal layer A, and with a further second ply A2 of the internal layer A, and with an additional elastomeric intermediate layer D and an exterior layer C.

[0040] FIG. 3 shows a refrigerant hose in the form of a barrier hose of the prior art with a braided reinforcement layer B, a three-ply structure of the internal layer A, where the thermoplastic ply A1 of the internal layer made of polyamide is embedded, as barrier ply, between two further plies A2, A3 of the internal layer A, and with a further second ply A2 of the internal layer A, an additional third ply A3 of the internal layer A and an exterior layer C.

[0041] FIG. 4 shows a refrigerant hose in the form of a barrier hose of the prior art with two spiralized reinforcement layers B1, B2, a three-ply structure of the internal layer A, where the thermoplastic ply A1 of the internal layer A made of polyamide is embedded, as barrier ply, between two further plies A2, A3 of the internal layer A, and with a further second ply A2 of the internal layer A, an additional third ply A3 of the internal layer A, and with an additional elastomeric intermediate layer D, and an exterior layer C.

[0042] FIG. 5 shows a refrigerant hose of the invention with a braided or knitted reinforcement layer B, a three-ply structure of the internal layer A, where the barrier ply A1 of the internal layer A made of elastomer-modified EVOH or of polyolefin-modified EVOH is embedded between two further plies A2, A3 of the internal layer A, and with a further second ply A2 of the internal layer A, an additional third ply A3 of the internal layer A, and an exterior layer C. The materials of the two further plies A2, A3 of the internal layer A are different from the material of the barrier ply A1.

[0043] FIG. 6 shows a refrigerant hose of the invention with two spiralized reinforcement layers B1, B2, a three-ply structure of the internal layer A, where the barrier ply A1 of the internal layer A made of elastomer-modified EVOH or of polyolefin-modified EVOH is embedded between two further plies A2, A3 of the internal layer A, and with a further second ply A2 of the internal layer A, an additional third ply A3 of the internal layer A, an additional intermediate layer D, and an exterior layer C. The materials of the two further plies A2, A3 of the internal layer A are different from the material of the barrier ply.

LIST OF REFERENCE SIGNS

(Part of the Description)

[0044] A Internal layer [0045] A1 Barrier ply of the internal layer [0046] A2 Further second ply of the internal layer [0047] A3 Additional third ply of the internal layer [0048] B Single reinforcement layer [0049] B1 First reinforcement layer [0050] B2 Second reinforcement layer [0051] D Elastomeric intermediate layer [0052] C Exterior layer