A flexible underwater pipe for transporting hydrocarbons, including a plurality of layers, at least one of which includes a polyethylene having enhanced heat resistance, to its preparation method and to its use for transporting hydrocarbons.

A high pressure hose having steel wires with different load elongation properties, which are introduced into the subsequent reinforcement layers of the hose. The difference in load elongation is quantified by the E-ratio of the wire that is equal to the tensile strength divided by the elongation at break. The steel wires of the radially outermost steel wire reinforcement layer have the highest E-ratio, while the radially innermost steel wire reinforcement layer has the lowest E-ratio. The E-ratio of any steel wire reinforcement layer is not lower than the E-ratio of any inner laying steel wire reinforcement layer. The E-ratio of the steel wires can be influenced by either a thermal treatment or by a mechanical treatment. In the mechanical treatment crimps or bends can be introduced into the wire by guiding them through a preforming device.

A hose is provided, including: a liner having a channel extending between opposing open ends; a reinforcing member surrounding the liner; and a plurality of spaced apart wrapped stiffening members surrounding the reinforcing member.

A silane-grafted polyolefin composition is disclosed, and includes a desired reduced specific weight material. The composition finds application in a wide array of uses, and in particular automotive and uses such as hoses, where this composition is used in place of conventional materials such as TPV and EPDM rubber formulations.

A silane-grafted polyolefin composition is disclosed, and includes a desired reduced specific weight material. The composition finds application in a wide array of uses, and in particular automotive and uses such as hoses, where this composition is used in place of conventional materials such as TPV and EPDM rubber formulations.

A hose is provided capable of meeting fireproof requirements per AS1055 under no flow condition. The hose has multiple layers including a yttria-stabilized zirconia (YSZ) flexible ceramic substrate layer disposed between first and second silicone rubber layers.

A tubular structure (1) formed by a plurality of circumferentially continuous tubes (11, 12) of fibre reinforced plastics material. The structure (1) comprises an outer shell (14) and at least one internal web (15). The plurality of tubes (11, 12) are bonded together and comprise a plurality of inner tubes (12) located inside an outer tube (11) such that they form each of the outer shell (14) and the internal web (15) with a pair of laminated layers of fibre reinforced plastics material bonded to one another.

Provided is a hydrogen-filling hose including an inner layer, a reinforcing layer, and an outer layer, the hydrogen-filling hose being characterized in that the inner layer includes a thermoplastic resin composition including a matrix that includes a polyamide resin and a domain that includes a modified styrene elastomer, the modified styrene elastomer content of the thermoplastic resin composition is 5-50 mass % of all polymer components in the thermoplastic resin composition, the reinforcing layer includes at least one layer that includes steel wire, and the outer layer includes a thermoplastic elastomer.

A method of making a rubber hose includes the steps of providing an inner rubber layer including a hollow part, and forming a first braided layer on the inner rubber layer by braiding a plurality of first yarn materials including a vinylon fiber made by a dry process such that the braided first yarn materials includes a braid formed in a three-over, three-under pattern. Next, a middle rubber layer is formed on the first braided layer. A second braided layer is then formed on the middle rubber layer by braiding a plurality of second yarn materials including a vinylon fiber made by a wet process such that the braided second yarn materials includes a braid formed in a two-over, two-under pattern. Finally, an outer rubber layer is formed on the second braided layer.

Methods of coating a base tube are disclosed. Various methods include passing a hollow base tube into a coating die while maintaining a chamber pressure outside the hollow base tube that is lower than a pressure within an inner lumen of the hollow base tube. Such methods can include extruding coating material onto the hollow base tube to form a coated hollow tube by delivering coating material into the coating die. Vacuum may be formed within the coating die proximate a point of impingement where the coating material is applied to the hollow base tube.