Abstract:
Thermoplastic multilayer composite, particularly in the form of a multilayer hose, a multilayer pipe or a multilayer container, containing at least one intermediate layer made of a molding compound on the basis of ethylene/vinyl alcohol copolymes between layers made of molding compounds on the basis of polyamide, the intermediate layer being bonded via at least one adhesion-promoting layer made of a molding compound on the basis of polyamide selected from the group of copolyamide 6/12, block copolyamide 6/12, polyamide 612, polyamide 610, a mixture of polyamide 6 and polyamide 12 with compatibilizer, a mixture of polyamide 6 and polyamide 11 with compatibilizer, with at least one neighboring layer made of a molding compound on the basis of polyamide 12, polyamide 11, polyamide 1010, polyamide 1012, or polyamide 1212.
Abstract:
A layered tubing (10) for use in a motor vehicle composed of a thick outer tubing (12) having an inner and an outer face, the outer tubing (12) made of an extrudable thermoplastic such as a polyamide like Nylon 12: a thin intermediate bonding layer (16) bonded to the inner face of the thick outer layer (12), the bonding layer (16) composed of an extrudable melt-processible thermoplastic capable of sufficiently permanent laminar adhesion to the polyamide outer tubing (12); and an inner hydrocarbon barrier layer (14) bonded to the intermediate bonding layer (16), the inner layer (14) composed of an extrudable, melt processible thermoplastic capable of sufficiently permanent laminar adhesion with the intermediate bonding layer (16), the thermoplastic containing as a major constituent a fluoroplastic such as polychlorotrifluoroethylene, ethylene tetrafluorethylene, polyvinylidine fluoride, polyvinyl fluoride, and the like.
Abstract:
Method of manufacturing a tube (1; 8); the method includes a first step of partial vulcanization of an intermediate tube (2) having a first layer (3) made of polymeric material, a reinforcement layer (4) and a second layer (5) made of polymeric material; a coating step, during which a third layer (6) of polymeric material is arranged around the intermediate tube (2); and a second vulcanization step, which is completed during the vulcanization of the above mentioned first, second and third layers (3, 5, 6), thus reducing the risk of damage to the third layer (6).
Abstract:
Multilayer tube for fluid transportation, comprising, from the interior to the exterior: an inner layer comprising at least one polyamide in admixture with at least one elastomer; a first adhesive layer; a first layer comprising at least one polyolefin. The multilayer tube preferably further comprises a second layer comprising at least one polyolefin placed internally with respect to the inner layer and bonded to the inner layer by a second adhesive layer. Said tube is provided with high mechanical performance, in particular high resistance to the internal pressure exerted by the transported fluid, whilst still ensuring a suitable amount of flexibility. It can be used in particular for transporting hydrocarbons within the extraction site and from the extraction site to the refinery (the so called "upstream" sector).
Abstract:
A reinforced pipe includes a pipe liner, a helically wound radial reinforcement layer, a jacket, and longitudinal reinforcement. The longitudinal reinforcement includes a unidirectional material generally parallel to the axis of the pipe liner. The longitudinal layer may be within and/or adjacent the liner and/or the jacket. The longitudinal reinforcement restricts the pipe from expanding lengthwise, and the radial reinforcement layer restricts the pipe from expanding radially.
Abstract:
Die Erfindung betrifft ein Rohr (01) oder Rohrhalbzeug (02), insbesondere für den chemischen Apparatebau, zur Aufbewahrung oder zum Transport von aggressiven Einlagerungsmedien mit einem massiven Innenrohr (02), auf dessen Innenseite (05) das Einlagerungsmedium zur Anlage kommen kann und das aus einem gegen das Einlagerungsmedium chemisch widerstandfähigen Thermoplast hergestellt ist, und mit einer auf der Außenseite des Innenrohrs (02) angebrachten Haftvermittlungsschicht (03), die eine Textilstruktur aufweist und aus einem Thermo- plast hergestellt ist, wobei die Textilstruktur der Haftvermittlungsschicht (03) zur Anbringung eines Stützrohrs (04) an der Außenseite der Haftvermittlungsschicht (03) geeignet ist, wobei die Außenseite des Innenrohrs (02) und die Innenseite der Haftvermittlungsschicht (03) stoffschlüssig miteinander verschweißt sind, wobei an der Außenseite der Haftvermittlungsschicht (03) die Textilstruktur erhalten ist.
Abstract:
Bei einem Kunststoffrohr mit einer Verstärkung zur Aufnahme der durch einen Innendruck erzeugten und gemeinsam auf das Kunststoffrohr wirkenden Tangential- und Axialspannung, wobei die Verstärkung zumindest zwei Lagen umfasst, von denen eine erste der beiden Lagen als tangentiale Verstärkungslage zur Aufnahme der Tangentialspannungen und die zweite der beiden Lagen als axiale Verstärkungslage zur Aufnahme der Axialspannungen ausgebildet ist und die auf verschiedenen Radien vorgesehen sind, kann durch geeignete Wicklung von Verstärkungsfasern bzw. Verstärkungsbändern eine nahezu kontinuierliche Fertigung ermöglicht werden.
Abstract:
Die Erfindung betrifft ein Verbundrohr mit einem Rohr (1) aus vernetztem Polyethylen und mindestens einer das Rohr (1) umgebenden Schicht, wobei zwischen der Schicht (2) und dem Rohr (1) eine Armierung (3) aus mindestens einem Stahlfaden (4) angeordnet ist.
Abstract:
A multi-layer tube (10) suitable for use in motor vehicle system to transport fluids containing hydrocarbons such as would be found in a fuel line, a vapor return line or a vapor recovery tube having a first layer (14) radially disposed innermost made up of an extrudable melt-processible thermoplastic material selected from the group consisting of aromatic polyketones, aliphatic polyketones and mixtures thereof, and second layer (16) made up of an extrudable, melt-processible thermoplastic material capable of sufficiently permanent laminar adhesion with the first layer so as to prevent delamination between the first and second layers during a desired lifetime of the tube, and a third layer (12) overlying the first layer made up of a melt-processible thermoplastic material such as polyamides, high density polyethylenes and mixtures thereof. The tubing of the present invention may, optionally, include additional layers interposed between the respective layers or may include additional layers which overlie the exterior surface of the second layer.
Abstract:
The invention relates to a multi-layer pressure pipe (20) of a plastic material. The multi-layer pressure pipe (20) is formed by using as the extruder an extruder (10) which cross-orients the reinforcement fibers in the extruded material in the successive layers (21, 22, 23, 24), and the material extruded is a polyolefin which contains long-fiber reinforcements.