US 12,103,266 B2
Flexible high-pressure fluid conveying pipe
Edgard Chow, Houston, TX (US); and Astrid Torres, Houston, TX (US)
Assigned to KURARAY CO., LTD., Kurashiki (JP)
Filed by KURARAY CO., LTD., Kurashiki (JP)
Filed on Jan. 29, 2021, as Appl. No. 17/161,730.
Claims priority of provisional application 62/967,906, filed on Jan. 30, 2020.
Prior Publication US 2021/0237390 A1, Aug. 5, 2021
Int. Cl. B32B 1/08 (2006.01); B32B 7/12 (2006.01); B32B 17/02 (2006.01); B32B 17/10 (2006.01); B32B 27/12 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); F16L 11/08 (2006.01); F17D 5/00 (2006.01)
CPC B32B 1/08 (2013.01) [B32B 7/12 (2013.01); B32B 17/02 (2013.01); B32B 17/10 (2013.01); B32B 27/12 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); F16L 11/08 (2013.01); F17D 5/00 (2013.01); B32B 2250/05 (2013.01); B32B 2262/101 (2013.01); B32B 2597/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. 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.