An extensible corrugated hose comprises a first bearing layer (1) in a elastically extensible first polymeric material, a reinforcement (2) wound on said first layer (1), a stabilizing second layer (3) in an elastically extensible second polymeric material covering the reinforcement (2) for defining a corrugated single tubular body (4) with the first layer (1), a coating third layer (5) placed on the second layer (3) for covering the corrugated single tubular body (4).

A method for producing wound hollow profiles having variable curvatures and cross-sections. In this case, a core having at least one curvature or cross-sectional change is moved in a translatory manner relative to a system having at least a first and a second fibre feed which cause the formation of an axial fibre reinforcement and at least one first wound layer.

A method for producing wound hollow profiles having variable curvatures and cross-sections. In this case, a core having at least one curvature or cross-sectional change is moved in a translatory manner relative to a system having at least a first and a second fibre feed which cause the formation of an axial fibre reinforcement and at least one first wound layer.

A pressure vessel includes a vessel body including a cylindrical-shaped straight body portion with a spiral-shaped projection portion formed at an outer peripheral surface of the straight body portion, and a covering portion that comprises a fiber bundle wrapped onto the outer peripheral surface of the straight body portion in a spiral pattern running parallel to the projection portion so as to cover the outer peripheral surface of the straight body portion.

A pressure vessel includes a vessel body including a cylindrical-shaped straight body portion with a spiral-shaped projection portion formed at an outer peripheral surface of the straight body portion, and a covering portion that comprises a fiber bundle wrapped onto the outer peripheral surface of the straight body portion in a spiral pattern running parallel to the projection portion so as to cover the outer peripheral surface of the straight body portion.

A method for manufacturing a rolled retraction cord is provided. The method comprises the steps of: (A) preparing the sheet, the sheet comprising a first side edge and a second side edge opposite to each other; (B) placing the sheet on a first surface of a first forming member; (C) contacting the first side edge of the sheet with a second surface of a second forming member, the first side edge of the sheet sandwiched between the first surface of the first forming member and the second surface of the second forming member; and (D) applying a force via the first surface or the second surface to the sheet, and rolling the sheet from the first side edge to the second side edge to obtain the retraction cord. With this method, a rolled retraction cord with a smooth surface and enhanced ductility is capable of being provided.

A method for manufacturing a rolled retraction cord is provided. The method comprises the steps of: (A) preparing the sheet, the sheet comprising a first side edge and a second side edge opposite to each other; (B) placing the sheet on a first surface of a first forming member; (C) contacting the first side edge of the sheet with a second surface of a second forming member, the first side edge of the sheet sandwiched between the first surface of the first forming member and the second surface of the second forming member; and (D) applying a force via the first surface or the second surface to the sheet, and rolling the sheet from the first side edge to the second side edge to obtain the retraction cord. With this method, a rolled retraction cord with a smooth surface and enhanced ductility is capable of being provided.

A method for manufacturing a vehicle interior trim decorative layer. The method includes: a die cutting step during which at least two parts to be sewn are die cut from a flat film, each of the at least two parts to be sewn having an outer surface and an inner surface opposite to the outer surface; a gluing step during which an adhesion agent is applied, by means of a roller coating machine, on the inner surface of each part to be sewn, and a sewing step during which all parts to be sewn are sewn together along a sewing line by means of a sewing machine so as to form a 3D shaped decorative layer. The decorative layer can be used with a substrate to form a vehicle interior trim. The method enables manufacturing of a 3D shaped decorative layer using a roller coating machine.

The high pressure tank includes a liner, a hoop layer, and a helical layer. The liner includes a cylindrically-shaped trunk portion and dome portions disposed on both ends in an axial direction of the trunk portion. In the hoop layer, a fiber impregnated with a resin is wound in hoop winding and laminated to cover the trunk portion. In the helical layer, a fiber impregnated with a resin is wound in helical winding and laminated to cover at least the dome portions. An interface strength between the fiber and the resin on the hoop layer covering the trunk portion has a low fatigue strength and a high tensile strength compared with an interface strength between the fiber and the resin on the helical layer covering the dome portions.

A helical winding unit of a filament winding apparatus includes guide members guiding fiber bundles F to a liner, a movement mechanism moving the guide members, and a rotation mechanism rotating the guide members. Each of the guide members includes two side walls and guide portions fixed between the two side walls. As the guide portions, a first guide portion having a first guide surface and a second guide portion having a second guide surface and provided downstream of the first guide portion are provided. In the height direction, the first guide surface is oriented to one side. The second guide surface is oriented to the other side in the height direction and provided on the other side of the first guide surface.