HOSE LINE FOR A FLUID AND METHOD FOR PRODUCING SUCH A HOSE LINE

Abstract

The present disclosure relates to a hose line for a fluid comprising a support layer, a first barrier layer configured to prevent the diffusion of the fluid, and a second barrier layer, wherein the first barrier layer is arranged on the internal side of the hose line and the second barrier layer is arranged between the first barrier layer and the support layer. The present disclosure further relates to a method for producing a hose line.

Claims

1. A hose line for a fluid, comprising: a support layer; a first barrier layer configured to prevent a diffusion of the fluid, a second barrier layer, wherein the first barrier layer is arranged on an internal side of the hose line and the second barrier layer is arranged between the first barrier layer and the support layer.

2. The hose line according to claim 1, wherein the first barrier layer arranged on the internal side of the hose line is electrically conductive.

3. The hose line according to claim 1, wherein the hose line further comprises an electrically conductive strip for discharging electrical charge arranged on the internal side of the hose line.

4. The hose line according to claim 3, wherein the first barrier layer arranged on the internal side of the hose line comprises a recess for accommodating the electrically conductive strip.

5. The hose line according to claim 3, wherein the hose line comprises an inner layer o cover the electrically conductive strip on the internal side of the first barrier layer.

6. The hose line according to claim 3, wherein the electrically conductive strip has a radial thickness of between 30 μm and 60 μm.

7. The hose line according to claim 1, wherein the hose line comprises a first support layer, a second support layer arranged in the interior of the hose line relative to the first support layer, and an intermediate layer arranged between the first support layer and the second support layer.

8. The hose line according to claim 7, wherein the intermediate layer is configured as a textile pressure carrier and contains p-aramid, POD, polyamide, and/or PET fibers.

9. The hose line according to claim 7, wherein at least one of the first support layer or the second support layer contains an epichlorohydrin elastomer, art acrylate elastomer, or an ethylene acrylate elastomer.

10. The hose line according to claim 1, wherein one of the barrier layers predominantly comprises a thermoplastic fluoroelastomer vulcanizate and the other of the barrier layers predominantly comprises a fluoroelastomer or a fluororubber.

11. The hose line according to claim 10, wherein the thermoplastic fluoroelastomer vulcanizate exhibits a thermoplastic matrix of fluorine resins in which areas of fluororubber have been vulcanized.

12. The hose line according to claim 10, wherein the barrier layer of thermoplastic fluoroelastomer vulcanizate has a layer thickness between 0.15 mm and 3.0 mm and the barrier layer of thermoplastic fluoroelastomer or fluororubber has a layer thickness between 0.8 mm and 1.5 mm.

13. The hose line according to claim 10, wherein the barrier layer of fluoroelastomer vulcanizate is arranged on the internal side of the hose line and thus forms the first barrier layer, and the barrier layer of fluororubber or fluoroelastomer is arranged adjacent to the barrier layer of thermoplastic fluoroelastomer vulcanizate and thus forms the second barrier layer, and wherein the second barrier layer forms an adhesion system between the first barrier layer and a support layer of epichlorohydrin elastomer, acrylate elastomer or ethylene acrylate elastomer adjoining the second barrier layer by vulcanization.

14. A method for producing a hose line for a fluid, comprising: arranging a second barrier layer on an internal side of a support layer; arranging a first barrier layer on the internal side of the second barrier layer, wherein the first barrier layer is configured to prevent diffusion of the fluid; joining the support layer to the second barrier layer; and joining the second barrier layer to the first barrier layer.

15. The method according to claim 14, further comprising: producing one or more of the support layer, the first barrier layer, or the second barrier layer by extrusion.

16. The method according to claim 14, further comprising: arranging a first support layer and a second support layer on an external side of the second barrier layer, and arranging an intermediate layer between the first support layer and the second support layer.

17. The method according to claim 16, wherein the intermediate layer is braided, spiraled, or knitted.

18. The method according to claim 14, further comprising: arranging an electrically conductive strip on an external side of the first barrier layer.

19. The method according to claim 16, further comprising: joining the first barrier layer to the second support layer through vulcanization.

20. The method according to claim 14, wherein joining the support layer to the second barrier layer and joining the second barrier layer to the first barrier layer comprises vulcanization or use of an adhesion agent.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings will be referenced below in describing examples of the disclosure.

[0026] FIG. 1 shows a cross-sectional view of a first example of the hose line, and

[0027] FIG. 2 shows a perspective view of a further example of the hose line.

DETAILED DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 shows a first example of the hose line 100 according to the disclosure in a cross-sectional view. The hose line 100 comprises a support layer 101. This layer ensures the required mechanical strength for the hose line 100, for example against tensile loads, the pressure of the fluid flowing in the hose line 100, as well as against mechanical damage attributable to external influences. The support layer 101 can for example consist of or contain an epichlorohydrin elastomer, an acrylate elastomer, or an ethylene acrylate elastomer.

[0029] A first barrier layer 103 is arranged on the internal side 107 of the hose line 100; i.e. in contact with a fluid flowing within the hose line 100. The first harrier layer 103 is resistant to the fluid and prevents the diffusion of the fluid through the first barrier layer 103, preferably to a. greater extent than the support layer 101 could prevent diffusion.

[0030] The first barrier layer 103 is preferably substantially thinner than the support layer 101. The first barrier layer 103 preferably consists entirely or predominantly of for example, thermoplastic fluoroelastomer vulcanizate or fluoroelastomer. The thermoplastic fluoroelastomer vulcanizate preferably exhibits a thermoplastic matrix of fluorine resins in which areas of fluororubber have been vulcanized.

[0031] A second barrier layer 105 is arranged between the support layer 101 and the first barrier layer 103. This prevents the further diffusion of fluid which has already diffused through the first barrier layer 103. The second barrier layer 105 can likewise consist preferably entirely or predominantly of thermoplastic fluoroelastomer vulcanizate or fluoroelastomer. In so doing, the materials of the two barrier layers 103, 105 preferably differ so that the barrier layers 103, 105 exhibit different properties, for example the second barrier layer 105 effectively preventing the diffusion of the fluid constituents which are able to diffuse through the first barrier layer 103 or the second barrier layer 105 not needing to have the same degree of resistance to the fluid as the first barrier layer 103.

[0032] In the implementation depicted in FIG. 1, the first barrier layer 103 consists of for example, thermoplastic fluoroelastomer vulcanizate (F-TPV) and the second barrier layer 105 consists of for example, fluoroelastomer (FPM). The first barrier layer 103 of thermoplastic fluoroelastomer vulcanizate hereby exhibits a layer thickness of 0.28 mm (0.011 in) and the second barrier layer 105 of fluororubber exhibits a layer thickness of 1.3 mm (0.051 in). in the implementation depicted in FIG. 1, the second barrier layer 105 of fluoroelastomer, which is arranged between the first barrier layer 103 and the support layer 101, forms an adhesion system by means of vulcanization between the first barrier layer 103 of fluoroelastomer vulcanizate and the support layer 101, formed here of epichlorohydrin elastomer, and, thereby also yields production-related advantages in addition to reduced diffusion.

[0033] FIG. 2 depicts a further implementation 200 of the hose line. The implementation according to FIG. 2 comprises a first support layer 203, a second support layer 205, and an intermediate layer 207 arranged between the first support layer 203 and the second support layer 205. In order to prevent the diffusion of a fluid flowing within the hose line 200 through the wall of the hose line 200, the hose line further comprises a first barrier layer 103 as well as a second barrier layer 105. The first barrier layer 103 is arranged on the internal side of the hose line 200. The second barrier layer 105 is arranged between the first barrier layer 103 and the second support layer 205.

[0034] The intermediate layer 207 arranged between the first support layer 203 and the second support layer 205 is formed as a textile pressure carrier in the depicted implementation. The barrier layer formed as a textile pressure carrier can be braided, spiraled, or knitted, for example, and can contain p-aramid, POD, polyimide and/or PET fibers. The intermediate layer 207 absorbs compressive forces of the fluid flowing within the hose line 200 and can also absorb tensile forces as well as protect the hose line 200 from external mechanical damage, for example so as to prevent leakage; additionally, it also affords the hose line 200 kink resistance. This allows the first support layer 203 and the second support layer 205 to be dimensioned so as to require less material and be of lower weight while simultaneously realizing optimized mechanical properties. The first support layer 203 simultaneously forms the top layer of the hose line 200.

[0035] In the implementation depicted in FIG. 2, the first support layer 203 is formed from ethylene acrylate elastomer and the second support layer 205 from epichlorohydrin elastomer. However, other suitable elastomers can also be used, for example acrylonitrile-butadiene elastomer (NBR), chloroprene elastomer, ethylene vinyl acetate elastomer or even chlorinated or chlorosulfonated polyethylene.

[0036] In the implementation depicted in FIG. 2, the hose line comprises electrically conductive strips 201. This enables the preventing of an electrical charge, e.g. when fueling, or, respectively, being able to safely discharge electrical charges. The first barrier layer 103 arranged on the internal side 107 of the hose line 200 comprises recesses here in which the electrically conductive strips 201 are arranged.

[0037] As in the implementation from FIG. 1, the first barrier layer 103 consists of for example, thermo-plastic fluoroelastomer vulcanizate (F-TPV) and the second barrier layer 105 consists of for example, fluoroelastomer (FPM) in the implementation depicted in FIG. 2. Here as well, the first barrier layer 103 of thermoplastic fluoroelastomer vulcanizate has a layer thickness of 0.28 mm (0.011 in) and the second barrier layer 105 of fluororubber a layer thickness of 1.3 mm (0.051 in). The second barrier layer 105 of fluoroelastomer, which is arranged here between the first barrier layer 103 and the second support layer 205, also forms an adhesion system by means of vulcanization between the first barrier layer 103 of fluoroelastomer vulcanizate and the second support layer 205 of epichlorohydrin elastomer in the implementation shown in FIG. 2 and thereby also yields, additionally to reduced diffusion, production-related advantages.

[0038] The implementation of a hose line 200 as shown in FIG. 2 with two barrier layers 103, 105, two support layers 203, 205, and an intermediate layer 207, achieves a sealing of the hose line 200 which meets all the current legal standards regarding reliable diffusion of fuels by fuel-carrying hose lines and, at the same time, achieves high mechanical stability and strength as well as the required protection against damage attributable to external influences, in particular related to the operating conditions of motor vehicles.

[0039] One example of a method for producing a hose line 100 for a fluid according to the disclosure comprises the following steps. Providing a support layer 101, providing a first barrier layer 103 configured to prevent the diffusion of the fluid, providing a second barrier layer 105, arranging the second barrier layer 105 on the internal side of the support layer 101, arranging the first barrier layer 103 on the internal side of the second barrier layer 105, as well as joining the support layer 101 to the second barrier layer 105 and joining the second barrier layer 105 to the first barrier layer 103, particularly by vulcanization. The layers can also be joined in another way other than vulcanization, for example by means of an adhesion agent for joining the layers together. It is also conceivable to, for example, join the second barrier layer 105 to the first support layer 101 by adhesion and then join the first barrier layer 103 to the second barrier layer 105 by vulcanization.

[0040] One or more of the layers 101, 103, and 105 can be provided by means of extrusion. Thus, for example, the barrier layers 103, 105 can be produced in an extrusion process while the support layer 101 is produced by means of another method. Preferably, however, all three layers 101, 103, and 105 are produced by extrusion. The intermediate layer 207 in the form of a textile pressure carrier can be applied as a braided, knitted, or spiraled layer.

LIST OF REFERENCE NUMERALS

[0041] 100 hose line according to a first example [0042] 101 support layer [0043] 103 first barrier layer [0044] 105 second barrier layer [0045] 107 internal side of hose line [0046] 200 hose line according to a second example [0047] 201 electrically conductive strip [0048] 203 first support layer [0049] 205 second support layer [0050] 207 intermediate layer