Plastics Material Hose With Fibre Reinforcement

Abstract

There is illustrated and described a plastics material hose comprising: a hose wall of plastics material, and an electrical conductor, wherein the electrical conductor is constructed as a braid having a plurality of fibres. In order to achieve compensation for and reliable discharge of electrical charge concentrations with specific disadvantages being avoided, it is proposed that the braid have at least one carbon fibre.

Claims

1) A plastics material hose comprising: a hose wall of plastics material, and an electrical conductor, wherein the electrical conductor is constructed as a braid having a plurality of fibres, and wherein the braid has at least one carbon fibre.

2. The plastics material hose according to claim 1, wherein the braid has at least one plastics material fibre.

3. The plastics material hose according to claim 1, wherein the braid has an electrical resistance of 10.sup.3 Ohm or less.

4. The plastics material hose according to claim 1, wherein the hose wall is produced from a plastics material, in particular from TPU, PVC, TPE or PE, which has a hardness in the range between 50 Shore-A and 90 Shore-A.

5. The plastics material hose according to claim 1, further comprising a reinforcement which has a higher rigidity than the hose wall.

6. The plastics material hose according to claim 5, wherein the reinforcement is produced from a plastics material and has a hardness in the range between 30 Shore-D and 60 Shore-D.

7. The plastics material hose according to claim 5, wherein the reinforcement is constructed in a helical manner.

8. The plastics material hose according to claim 5, wherein the reinforcement is integrated in the hose wall.

9. The plastics material hose according to claim 1, further comprising an inner layer which extends over the entire inner face of the plastics material hose.

10. The plastics material hose according to claim 9, wherein the inner layer is produced from an antistatic/dissipative or electrically conductive plastics material.

11. The plastics material hose according to claim 9, wherein the braid is arranged between the hose wall and the inner layer.

12. The plastics material hose according to claim 1, wherein the hose wall is produced from one or more helically wound plastics material strips.

13. The plastics material hose according to claim 12, wherein the plastics material strip which forms the hose wall has edge regions which are arranged so as to overlap and which are connected to each other in a materially engaging manner in the region of the overlap.

14. The plastics material hose according to claim 13, wherein the braid is arranged between the overlapping edge regions of the plastics material strip.

15. The plastics material hose according to claim 2, wherein the at least one plastics material fibre comprises at least one polyester fibre.

16. The plastics material hose according to claim 6, wherein the reinforcement comprises TPU, PVC, or PE.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The invention is explained in greater detail below with reference to the drawings, which are merely illustrative and do not limit the scope of the invention. In the drawings:

[0026] FIG. 1 is a sectioned view of a first embodiment of a plastics material hose according to the invention, and

[0027] FIG. 2 is a sectioned view of a second embodiment of a plastics material hose according to the invention.

DETAILED DESCRIPTION

[0028] FIG. 1 shows a plastics material hose 1 according to the invention in a first embodiment. The illustration selected for FIG. 1 is a section through the hose wall in the longitudinal direction of the plastics material hose 1. The plastics material hose 1 comprises a hose wall 2 of plastics material, a helical reinforcement 3 of plastics material and an inner layer 4 which is also produced from plastics material. The inner layer 4 preferably contains an antistatic or conductive carbon black. The plastics material hose 1 additionally comprises an electrical conductor 5 which, in the embodiment which is illustrated in FIG. 1 and which is preferred in this regard is constructed as a braid with a plurality of fibres 6. The fibres are carbon fibres 6A and plastics material fibres 6B. The metal conductor 5 extends in a helical manner and is arranged between the hose wall 2 and the inner layer 4 so that the metal conductor 5 is continuously in contact with the inner layer 4 and touches it.

[0029] The plastics material hose 1 extends symmetrically about a centre axis 7 which extends in the longitudinal direction of the plastics material hose 1 so that, in FIG. 1, the illustration of the lower half of the plastics material hose 1 can be dispensed with. The reinforcement 3 is constructed in a helical manner in the embodiment which is preferred in this regard and which is illustrated in FIG. 1, and is integrated in the hose wall 2 so that the reinforcement 3 is completely surrounded by the material of the hose wall 2. The inner layer 4 is produced from an antistatic, in particular electrically conductive, plastics material and completely lines the inner side of the plastics material hose 1.

[0030] The plastics material hose has an outer face 8 and an inner face 9, wherein in the plastics material hose 1 illustrated in FIG. 1 by way of example, the outer face 8 is formed by the hose wall 2 and wherein the inner face 9 is formed by the inner layer 4. As a result of the considerable thickness of the reinforcement 3, the outer face 8 of the plastics material hose 1 is curved outwards in the region of the reinforcement 3.

[0031] FIG. 2 is a sectioned view of a second embodiment of a plastics material hose 1′ according to the invention. Those regions of the plastics material hose 1′ which have already been described in connection with FIG. 1 are provided with corresponding reference numerals in FIG. 2. The plastics material hose 1′ is produced from a plastics material strip 10. In this type of production, a plastics material strip 10 is wound in a helical manner, wherein the edge regions of the plastics material strip 10 form an overlap 11. The overlapping edge regions of the plastics material strip 10 are subsequently welded to each other or adhesively bonded so that reliable sealing of the seam location is achieved. The plastics material hose 1′ produced in this manner extends symmetrically about a centre axis 6 which extends in the longitudinal direction of the hose 1′, wherein the welded or adhesively-bonded plastics material strip 10 forms a hose wall 2. Preferably, the material of the plastics material strip 10 contains an antistatic.

[0032] The plastics material hose 1′ which is illustrated in FIG. 2 has an electrical conductor 5 which in the embodiment which is preferred in this regard and which is illustrated in FIG. 2 is also constructed as a braid having a plurality of fibres 6. The fibres 6 are carbon fibres 6A and plastics material fibres 6B. In the second embodiment of the plastics material hose 1′, the electrical conductor 5 is arranged in the region of the overlap 11, that is to say, between the overlapping edge regions of the plastics material strip 10.

LIST OF REFERENCE NUMERALS

[0033] 1, 1′: Plastics material hose

[0034] 2: Hose wall

[0035] 3: Reinforcement

[0036] 4: Inner layer

[0037] 5: Electrical conductor

[0038] 6: Fibre

[0039] 6A: Carbon fibre

[0040] 6B: Plastics material fibre

[0041] 7: Centre axis

[0042] 8: Outer face (of the plastics material hose 1)

[0043] 9: Inner face (of the plastics material hose 1)

[0044] 10: Plastics material strip

[0045] 11: Overlap