A tube-in-tube assembled parison for preparation of an elongated medical device. The parison if formed by assembling in tube-in-tube fashion a first tube of orientable polymer material and a second tube formed of orientable polymer material disposed around the first tube, with an adhesive tie layer disposed between the first and second tubes. The tubes are brought into contact to form a unitary parison. The adhesive may allow movement between the polymer layers during balloon blowing. The first tube, or the second tube, or both, may have been longitudinally pre-stretched after formation thereof but before assembly of the parison.

The invention relates to a polyamide moulding compound consisting of the following components: (A) 35-68 wt. % of at least one semi-crystalline, semi-aromatic, thermoplastic polyamide based on aliphatic diamines with 4-8 carbon atoms with a melting temperature of at least 270 C.; (B) 15-22 wt. % carbon fibres; (C) 18-30 wt. % glass fibres; (D) 1-10 wt. % of an impact-resistance modifier that is different from (E) and/or polymers that are different from (A), (E) and (F); (E) 0-10 wt. % ethylene-vinyl acetate copolymer; and (F) 0-3 wt. % additives. In this way, the sum of the components (A)-(F) is 100 wt. %, the sum of the components (B)-(C) is in the range of 33-48 wt. %, and the sum of the components (D)-(E) is in the range of 2-12 wt. %. The moulding compound permits the production of dimensionally stable, electrically conductive components, e.g. for the automotive sector and for contact with fuels, in particular methanol-containing petrol.

A method for providing an integrated composite article made of a metal and a resin is provided. A crystalline thermoplastic resin composition is provided as a resin material. A plate material of various kinds of Al alloys having a thickness of 0.5 to 1.5 mm and having been subjected to a chemical treatment of NMT and cut out to be of a form and a dimension is placed in a metallic mold for an injection molding and injecting the crystalline thermoplastic resin composition into the metallic mold to form the integrated composite article having a final plate shape including curved face portion. The integrated composite article is provided as a roof of an automobile, and contribute to promotion of lighter weight of a vehicle, reduction of CO.sub.2, coping with problems of global warming.

A polymer material comprises one or more different doping elements. The or at least one of the different doping elements at least partially absorbs an electromagnetic radiation emitted by a human or animal body and at least partially emits an electromagnetic radiation in an infrared range, preferably in an infrared C range. A textile material comprises the polymer material according to the invention. The invention further relates to medical and non-medical uses of the polymer material according to the invention and to a manufacturing method of the polymer material according to the invention.

A molding apparatus includes a movable molding surface with molding cavities, a pressure shoe with a stationary outer surface that defines in cooperation with the molding surface a pressure zone, and a resin source configured to introduce molten resin into the pressure zone to be forced into the molding cavities by pressure in the pressure zone. The molding surface is movable with respect to the pressure shoe to introduce molding cavities to the pressure zone to be filled with resin while the outer surface of the pressure shoe and the molding surface define in between an entrance gap of decreasing width upstream of the pressure zone. The outer surface of the pressure shoe is spaced from the molding surface in the pressure zone to define a minimum gap at which the outer surface of the pressure shoe has a slope parallel to the molding surface. The pressure shoe is adapted to be held in a flexed condition against resin in the pressure zone while forcing resin into the cavities, with the outer surface of the pressure shoe curved upstream of the pressure zone.

The present invention relates to a process for producing a shaped body by selective laser sintering of a sinter powder (SP). The sinter powder (SP) comprises at least one semicrystalline polyamide, at least one nylon-6I/6T and at least one reinforcing agent. The present invention further relates to a shaped body obtainable by the process of the invention and to the use of nylon-6I/6T in a sinter powder (SP) comprising at least one semicrystalline polyamide, at least one nylon-6I/6T and at least one reinforcing agent for broadening the sintering window (W.sub.SP) of the sinter powder (SP).

An in-situ hydrophobically modified aramid nano aerogel fiber as well as a preparation method and uses thereof are provided. The preparation method includes: providing an aramid nano spinning solution; preparing a hydrophobically modified aramid nano aerogel fiber by using a spinning technology, wherein the coagulating bath adopted by the spinning technology includes a first organic solvent and a halogenated reagent including a monochloroalkane, a monochloroalkane, a dibromoalkane, a dichloroalkane and a trichloroalkane; and then drying to obtain the in-situ hydrophobically modified aramid nano aerogel fiber. The in-situ hydrophobically modified aramid nano aerogel fiber has a unique three-dimensional porous network structure, low heat conductivity, high porosity, high tensile strength and elongation at break, a certain spinnability and structure stability, and can be applied to the field of textiles. A fabric knitted with the hydrophobic fibers has a self-cleaning ability.

A composite composition, and process for making and article comprising same, the composition comprising 3 to 30 parts by weight particles comprising aramid copolymer including an imidazole group, and up to 97 parts by weight of a thermoplastic engineering polymer; wherein said particles are uniformly dispersed in the thermoplastic engineering polymer and reduce the wear rate of the thermoplastic engineering polymer by at least 25 percent.

A process of modifying a surface of a composite material base unit includes: providing the composite material base unit; pressing at least one impression module of a modifying unit on the surface of the composite material base unit to form at least one surface geometry on the surface; optionally heating the surface of the composite material base unit by at least one or more of heating before pressing, during pressing, after pressing, or combinations thereof; the composite material base unit contains at least one or more of a resilient material, a covering material, or a combination thereof, the at least one impression module includes at least one protrusion, and/or at least one depression resulting in the surface geometry on the surface. Also herein is a process for preparing an interlocked composite material base unit and a process of utilizing the composite material base unit in automotive and construction.

An additive manufacturing system operates an extruder to extrude a swath of thermoplastic material through at least two nozzles of the extruder to form a swath of thermoplastic material along a path of relative movement between the extruder and a platform. The speed of the extruder along the path corresponds to a predetermined speed selected with reference to an orientation of the extruder and the angle for the path of relative movement between the extruder and the platform. A controller in the system operates at least one actuator operatively connected to at least one of the extruder and the platform to move the at least one of the extruder and the platform relative to the other of the extruder and the platform along the path of relative movement at the predetermined speed to make the swath of the thermoplastic material contiguous in a cross-process direction.