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US 12,103,266 B2Granted
Flexible high-pressure fluid conveying pipe
AssigneeKuraray Co., Ltd.
InventorsEdgard Chow, Astrid Torres
Life of this patent
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Abstract
A flexible pipe comprising at least one layer of ethylene-vinyl alcohol resin (EVOH) as the innermost layer, wherein the pipe is suitable for use under high pressure, is configured to retain mechanical properties at pressures up to at least about 1500 psig, and can also retain its structural function upon decompression.
Claims5
A pipe, comprising a layer structure of, in order from an outer side, a sheath layer, a reinforcing layer, an inner layer, and a hollow portion contained by the inner layer, wherein
- the pipe is flexible,
- the inner layer is a multilayer article having a 3-layer structure (PO)/(AD)/(X),
- wherein
- (X) is an innermost layer containing the hollow portion and comprising, as a resin only an ethylene-vinyl alcohol copolymer,
- (PO) is a layer of a polyolefin resin composition,
- (AD) is a layer of an adhesive resin composition,
- and
- an ethylene unit content of the ethylene-vinyl alcohol copolymer is 20 mol % or more and 60 mol % or less.
5 more elements
Dependencies are inferred from the claim text.