# US 2024/0200692 A1 · Multilayer pipeline

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- Number: US 2024/0200692 A1
- Document ID: US20240200692A1
- Status: Published application
- Kind: A1
- Application number: 18/287,840
- Filed: 2022-04-21
- Published: 2024-06-20
- Earliest claimed: 2021-04-21
- Applicants: TI Automotive (Fuldabrueck) GmbH
- Inventors: Andre HÄCKEL; Frank FAHRENHOLZ; Martin SCHRAMOWSKI; Siegfried ARNOLD
- Web page: https://patentgrep.com/patent/US20240200692A1

## CPC

- F16L 11/045: {with four or more layers without reinforcement}
- B32B 1/08: Tubular products
- B32B 7/02: Physical, chemical or physicochemical properties
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/18: characterised by the use of special additives
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/322: {comprising halogenated polyolefins, e.g. PTFE}
- B32B 27/34: comprising polyamides
- B32B 2250/05: 5 or more layers
- B32B 2250/24: All layers being polymeric
- B32B 2307/202: Conductive
- B32B 2307/7242: Non-permeable
- B32B 2307/732: Dimensional properties
- B32B 2307/7376: Thickness
- B32B 2597/00: Tubular articles, e.g. hoses, pipes
- B32B 2605/00: Vehicles
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

A multilayer motor vehicle pipeline, wherein at least one barrier layer comprised of at least one material from the group “butene diol-vinyl alcohol copolymer (BVOH), polyvinyl alcohol (PVOH), polymer blend with BVOH, polymer blend with PVOH” is provided. At least one outer layer made of plastic is arranged on the exterior side of the barrier layer.

## Claims

### Claim 1

A multilayer motor vehicle pipeline, having at least one barrier layer comprised of at least one material selected from the group of butene diol-vinyl alcohol copolymer (BVOH), polyvinyl alcohol (PVOH), polymer blend with BVOH, polymer blend with PVOH, and wherein at least one outer layer made of plastic is arranged on the exterior side of the barrier layer.

### Claim 2 (depends on 1)

The pipeline according to claim 1, wherein the motor vehicle pipeline is a hydrogen transport pipeline.

### Claim 3 (depends on 1)

The pipeline according to claim 1, wherein at least one inner layer made of plastic is arranged on the interior side of the barrier layer.

### Claim 4 (depends on 1)

The pipeline according to claim 1, wherein the outer layer consists essentially of a plastic selected from the group polyamide, polyolefin.

### Claim 5 (depends on 1)

The pipeline according to claim 1, wherein the outer layer consists essentially of polyamide 12 and/or polyamide 612.

### Claim 6 (depends on 1)

The pipeline according to claim 1, wherein at least one first bonding layer made of plastic is arranged between the barrier layer and the outer layer, wherein the first bonding layer consists of a polyamide.

### Claim 7 (depends on 1)

The pipeline according to claim 1, wherein the inner layer consists essentially of a plastic selected from the group “polyamide, polyolefin, fluoropolymer”.

### Claim 8 (depends on 1)

The pipeline according to claim 1, wherein at least areas of the inner layer are configured to be electrically conductive.

### Claim 9 (depends on 1)

The pipeline according to claim 1, wherein the inner layer consists essentially of a polyamide selected from the group polyamide 6, polyamide 12, polyamide 612.

### Claim 10 (depends on 1)

The pipeline according to claim 1, wherein at least one second bonding layer made of plastic is arranged between the barrier layer and the inner layer, wherein the second bonding layer consists of a polyamide.

### Claim 11 (depends on 1)

The pipeline according to claim 1, wherein at least one innermost layer made of plastic is connected to the interior side of the inner layer, wherein the innermost layer consists essentially of a fluoropolymer.

### Claim 12 (depends on 1)

The pipeline according to claim 1, wherein the innermost layer consists essentially of ETFE.

### Claim 13 (depends on 1)

The pipeline according to claim 1, wherein at least areas of the innermost layer are configured to be electrically conductive.

### Claim 14 (depends on 1)

The pipeline according to claim 1, wherein a thickness of the barrier layer measures at least 5% of the overall wall thickness of the pipeline.

### Claim 15 (depends on 6)

The pipeline according to claim 6, wherein the first bonding layer consists essentially of polyamide 6.

### Claim 16 (depends on 10)

The pipeline according to claim 10, wherein the second bonding layer consists essentially of polyamide 6.

### Claim 17 (depends on 1)

The pipeline according to claim 1, wherein a thickness of the barrier layer measures at least 10% of the overall wall thickness of the pipeline.