Evonik Degussa Gmbh

Evonik Operations Gmbh

Salzgitter Mannesmann Line Pipe Gmbh

Huels Aktiengesellschaft

Voss Automotive Gmbh

Evonik Specialty Chemicals Co., Ltd.

Rainer Goering

Andreas Dowe

Karl Kuhmann

Jasmin Berger

Juergen Franosch

Franz-Erich Baumann

Klaus Gahlmann

Michael Boeer

Hans Ries

Sonja Bollmann

Mario Resing

Maik Grebe

Sylvia Monsheimer

Roland Wursche

Horst Beyer

Maximilian Gruhn

Joern Winkels

Hans-Juergen Kocks

Guido Schmitz

Otfried Schwarzkopf

Martin Risthaus

Jianmin Yang

Fei Teng

Martin Himmelmann

Chenyu Ye

Daniel De Beer

Vera Schiemann

Christian Baron

Reinhard Buessing

Joerg Westmeier

Clemens Jacobs

Guenther Brudny

Huifeng Yu

A process for producing a thermoplastic composite pipe, where the process includes:

Thermoplastic composite pipe with multilayer intermediate lamina

A flexible pipe of multilayer structure with unbonded layers, where the pipe has an interior lining which comprises the following layers:

Flexible tube having high temperature resistance

A multilayer composite containing the following layers: I. a first layer (layer I) of a moulding compound containing at least 40 wt. % of the following components: 1) 60 to 99 parts by wt. of a copolyamide based on hexamethylenediamine, terephthalic acid and an aliphatic dicarboxylic acid having 8 to 19 carbon atoms and 2) 40 to 1 parts by wt. of an olefinic copolymer as impact modifier, wherein the parts by wt. of 1) and 2) sum to 100; and II. a second layer (layer II) of a moulding compound containing at least 60 wt. % of fluoropolymer, has a high heat distortion temperature, a very good impact resistance, a high elongation at break and good layer adhesion.

Multilayer composite comprising a fluoropolymer layer

A process for producing a thermoplastic composite pipe is provided. The thermoplastic composite pipe thus produced contains a liner, two or more composite layers composed of tape laminas, and a single- or multilayer intermediate lamina arranged between different composite layers. Composite formation between identical polymers in the process achieves improved adhesion. The thermoplastic composite pipe is especially suitable for offshore applications in oil or gas production.

A multilayer composite containing the following layers: 1. a first layer (layer I) of a moulding compound containing at least 40 wt. % of the following components: 1) 60 to 99 parts by wt. of a copolyamide based on hexamethylenediamine, terephthalic acid and an aliphatic dicarboxylic acid having 8 to 19 carbon atoms and 2) 40 to 1 parts by wt. of an olefinic copolymer as impact modifier, wherein the parts by wt. of 1) and 2) sum to 100; and II. a second layer (layer II) of a moulding compound containing at least 60 wt. % of a mixture of the following components: 1) 75 to 100 parts by wt. of a partly aromatic copolyamide and 2) 25 to 0 parts by wt. of an olefinic copolymer as impact modifier with the proviso that in the moulding compound of layer II the mixture of components 1) and 2) comprises at least 5 fewer parts by wt, of olefinic copolymer than in the moulding compound of layer I, has a high heat distortion temperature, a very good impact resistance, a high elongation at break and good layer adhesion.

Multilayer composite comprising layers of partly aromatic polyamides

A multilayer composite containing the following layers: I. a first layer (layer I) of a molding compound containing at least 40 wt. % of the following components: 1) 60 to 99 parts by wt. of a copolyamide based on hexamethylenediamine, terephthalic acid and an aliphatic dicarboxylic acid having 8 to 19 carbon atoms and 2) 40 to 1 parts by wt. of an olefinic copolymer as impact modifier, wherein the parts by wt. of 1) and 2) sum to 100; and II. a second layer (layer II) of a molding compound containing at least 60 wt. % of thermoplastic polyester, has a high heat distortion temperature, a very good impact resistance, a high elongation at break and good layer adhesion.

Multilayer composite comprising a polyester layer

A multilayer composite containing the following layers: I. a first layer (layer I) of a molding compound containing at least 40 wt. % of the following components: 1) 60 to 99 parts by wt. of a copolyamide based on hexamethylenediamine, terephthalic acid and an aliphatic dicarboxylic acid having 8 to 19 carbon atoms and 2) 40 to 1 parts by wt. of an olefinic copolymer as impact modifier, wherein the parts by wt. of 1) and 2) sum to 100; II. a second layer (layer II) of a molding compound containing at least 60 wt. % of EVOH; III. a third layer of a polyamide molding compound, has a high heat distortion temperature, a very good impact resistance, a high elongation at break and good layer adhesion.

Multilayer composite comprising an EVOH layer

The present invention relates to a process for the bonding of material for the production of three-dimensional objects by selective heating via a laser of wavelength from 100 to 3000 nm. The beam spot may be a focused or unfocused beam spot, or may indeed be spread, as is the case with the diode laser, where the bars may have a stacked arrangement. The selectivity of the melting process is achieved via the application of an absorber to certain subregions of a layer composed of a pulverulent substrate, and then heating of the absorber by laser radiation of wavelength from 100 to 3000 nm. The heated absorber transfers the energy present therein to its surrounding pulverulent substrate, which is melted thereby and, after cooling, has firm cohesive bonding.

Method and device for producing three-dimensional objects using laser technology and for applying an absorber using an inkjet method

A heatable line pipe useful for diesel fuel systems and fuel cell systems is provided. The heatable line pipe comprises in order from an inside of the pipe: a) an electrically insulating inner layer; b) a first electrically conductive layer; c) at least two current leads wound spirally around the first electrically conductive layer; d) a second electrically conductive layer over the at least two current leads forming a surface; and e) an outer cladding of an electrically insulating plastic material. The thickness of the second electrically conductive layer is 0.1 to 1.5 mm, and the at least two current leads form wave peaks in the surface of the second electrically conductive layer. The line pipe has the advantage that a fall in heating performance over the lifetime is effectively prevented.

Heatable line pipe and a method for producing the heatable pipe

A metal conduit pipe, which is covered with an extruded layer made of polyamide molding compound, is used to produce a duct laid in water, wherein in the course of laying the duct, the coating is exposed to a shearing pressure load and/or a bending load due to laying method selected.

Use of a conduit pipe for producing a duct laid in water

A pipeline laid trenchlessly and/or without a sand bed is produced using a metallic conduit which is encased with an extruded layer of a polyamide molding material. In this way, the durability of the outer shell required for trenchless laying techniques without a sand bed is ensured.

Method of producing an underground pipeline

The invention relates to a flexible pipe having a multi-layered structure comprising unbonded layers, comprising an inner lining having the following layer arrangement: a) an innermost layer made of a fluoropolymer molding compound, b) an intermediate layer made of a molding compound on the basis of an olefinic polymer, which is selected from the group consisting of polyethylene, isotactic polypropylene, syndiotactic polypropylene and syndiotactic polystyrene, c) an outer layer made of a polyamide molding compound, wherein the layer made of a polyamide molding compound is particularly efficiently protected against hydrolysis. The pipe is thus particularly suited for offshore applications in oil or gas production.

Flexible pipe having a multi-layered structure

The invention relates to a flexible tube of multilayer construction having unbonded layers, wherein at least one layer is formed in that a tape made of a plastic molding compound is spirally wound about a further inner layer, wherein the upper and lower layers of the tape are simultaneously or subsequently welded to each other at overlapping regions. The tube is particularly suitable for offshore application in oil and gas extraction

Flexible pipe and process for production thereof

A flexible pipe of multilayer structure which comprises the following layers, from the inside to the outside: an interior lining; an inner reinforcement layer; a layer of molded electrically conductive plastic; an outer reinforcement layer; and an exterior sheath. The electrically conductive plastic layer is in electrical contact with the two reinforcement layers, and the two reinforcement layers can be connected to a source of electrical current. It is thus possible to achieve efficient heating of the pipe, and it can therefore be used for conveying oil in cold regions.

Temperature-controllable pipe

A flexible pipe which can be heated efficiently, and may therefore be used for conveying oil in cold regions, is provided. The pipe comprises in order from inside to outside: an interior lining; a wound tape; and at least one reinforcement layer. The wound tape contains a first exterior layer of a plastics molding composition that is not electrically conductive; an intermediate layer of an electrically conductive plastics molding composition; and a second exterior layer of a plastics molding composition that is not electrically conductive. A volume resistivity to IEC 60093 of the intermediate layer is in the range from 10to 10&#x3a9;m, and the intermediate layer comprises at least two metallic conductors embedded into the plastic molding composition along an entire length of the tape in such a way that, the two conductors do not touch one another.

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Borken, Germany

Rainer Goering