The invention relates to a retractable pipe whose wall is formed of at least one flexible gas-impermeable and/or liquid-impermeable tape welded by its selvages in the form of a cylindrical helix and of at least one metal wire in the form of a cylindrical helix whose pitch is the same as the one formed by said band, characterized in that said tape is a double fabric textile comprising at least two regions where the two fabrics work together to delimit at least one inflatable zone, said textile being covered with a coating layer of a gas and/or liquid-impermeable material.

The invention relates to a tube including at least one layer formed of polytetrafluoroethylene, and an object of the invention is to provide a tube in which flexibility is adjusted while high mechanical strength is maintained. The object can be appropriately achieved by a tube including at least one layer formed by spirally winding a PTFE film, in which the tube has an endothermic peak in a range of 380° C.±10° C. in a temperature increasing process of DSC of the tube, and in at least one of the at least one layer, the number of windings per length of 10 mm in a longitudinal direction is not constant.

A member for use in undersea applications comprising a plurality of conduits assembled into a bundle; the bundle being wrapped with a pressure-sensitive tape comprising a backing, a layer of corrosion-resistant filaments on one surface of the backing, and pressure-sensitive adhesive layer that coats the filaments and binds them to the backing.

A member for use in undersea applications comprising a plurality of conduits assembled into a bundle; the bundle being wrapped with a pressure-sensitive tape comprising a backing, a layer of corrosion-resistant filaments on one surface of the backing, and pressure-sensitive adhesive layer that coats the filaments and binds them to the backing.

A member for use in undersea applications comprising a plurality of conduits assembled into a bundle; the bundle being wrapped with a pressure-sensitive tape comprising a backing, a layer of corrosion-resistant yarns on one surface of the backing, and pressure-sensitive adhesive layer that coats the corrosion-resistant yarns and binds them to the backing.

A member for use in undersea applications comprising a plurality of conduits assembled into a bundle; the bundle being wrapped with a pressure-sensitive tape comprising a backing, a layer of corrosion-resistant yarns on one surface of the backing, and pressure-sensitive adhesive layer that coats the corrosion-resistant yarns and binds them to the backing.

Embodiments of the present invention relate to elongated tubular members that include at least one layer comprising a cellulose ester. In some cases, the cellulose ester may be in the form of staple fibers. The layer may be formed via a wet-laid fiber web that may also include cellulose fibers. The elongated tubular members may be suitable for use with food and/or beverage items as, for example, drinking straws or other similar items.

A collapsible conduit includes an elongated sheet configured as a coil, the coil having a longitudinal axis, the elongated sheet having a first edge that includes a first hem and a second edge opposite the first edge and that includes a second hem, each hem including an overlapping portion that overlaps with the overlapping portion of the other hem, the first hem interlocked with the second hem to form an interlocking arrangement between the first and second edges, wherein the conduit is collapsible along the longitudinal axis between fully extended and collapsed positions, and wherein the overlapping portion of the each hem has an arcuate cross-section shape when the conduit is in both the fully extended and collapsed positions.

A composite armour for a flexible pipe includes a composite profile and a reinforcement tape. The composite profile includes longitudinally oriented reinforcement fibres embedded in a polymer matrix. The reinforcement tape includes a woven tape comprising fibres impregnated with a polymer material, in such a way that the weft thread of the reinforcement tape is orthogonal to the longitudinal direction of the profile, and the warp thread is parallel to the longitudinal direction of the profile.

A composite armour for a flexible pipe includes a composite profile and a reinforcement tape. The composite profile includes longitudinally oriented reinforcement fibres embedded in a polymer matrix. The reinforcement tape includes a woven tape comprising fibres impregnated with a polymer material, in such a way that the weft thread of the reinforcement tape is orthogonal to the longitudinal direction of the profile, and the warp thread is parallel to the longitudinal direction of the profile.