Abstract: Process for assembling, by fusion bonding using IR laser radiation, plastic multilayer tapes that comprise an oriented layer that is transparent to the radiation and a layer that absorbs this radiation, the tapes being fusion-bonded using the same technique to a plastic preformed support. Composite tube resulting from the fusion bonding of these tapes to a plastic core.

Abstract: Process for assembling, by fusion bonding using IR laser radiation, plastic multilayer tapes that comprise an oriented layer that is transparent to the radiation and a layer that absorbs this radiation, the tapes being fusion-bonded using the same technique to a plastic preformed support. Composite tube resulting from the fusion bonding of these tapes to a plastic core.

Abstract: A process for the manufacture of an oriented strip comprising a semi-crystalline polymer according to which a film comprising said polymer is drawn in a longitudinal direction on a length L between 2 points at which the film moves at a respective linear velocity of V1 and V2 during its drawing, characterized in that V1, v3 and L answer the following criteria: (v2?V1)/L>0.22 s?1.

Abstract: Process for the manufacture of a multi-layered polymer body comprising at least one reinforcing layer composed of an oriented polymer and at least one basic polymer layer directly in contact with at least a part of the reinforcing layer, wherein the polymer of the basic layer is compatible with the oriented polymer of the reinforcing layer, characterized by the steps of (a) applying the basic polymer layer as a stream of molten polymer to at least a part of the surface of the reinforcing layer; and (b) solidifying the molten polymer on the surface of the reinforcing layer by rapid cooling.

Abstract: A process for producing a multilayer plastic pipe protected from deterioration of its properties when being used and when being handled.

Abstract: Reinforced pipe obtained by winding, onto a tubular support based on a polymeric composition, of reinforcing tapes comprising an oriented polymeric composition in layers crossed at an equal but opposite angle relative to the axis of the pipe. The tapes are selected from those whose polymeric composition exhibits particular mechanical strength properties in tension.

Abstract: Assembly process and plastic composite tube Process for assembling, by fusion bonding using IR laser radiation, plastic multilayer tapes that comprise an oriented layer that is transparent to the radiation and a layer that absorbs this radiation, the tapes being fusion-bonded using the same technique to a plastic preformed support. Composite tube resulting from the fusion bonding of these tapes to a plastic core.

Abstract: Multilayer plastic pipe and its manufacturing process, the pipe being protected from deterioration of its properties, when being used and when being handled, and formed from a tubular polymeric support protected by two protective layers each comprising a polymeric composition of unoriented structure, the first layer being compatible with the polymeric composition of the subjacent plastic and the second being an external layer, also serving as finishing coat. A reinforcing layer formed from tapes comprising an oriented polymeric composition may be inserted between the support and the first protective layer.

Abstract: Reinforced pipe obtained by winding, onto a tubular support based on a polymeric composition, of reinforcing tapes comprising an oriented polymeric composition in layers crossed at an equal but opposite angle relative to the axis of the pipe. The tapes are selected from those whose polymeric composition exhibits particular mechanical strength properties in tension.

Abstract: A composition including, by weight: from 40 to 80% of at least one uncrosslinked composition (A) including at least one polyolefin (PA); from 60 to 20% of at least one crosslinked composition (B) including at least one propylene polymer (PB) and at least one ethylene-vinyl acetate (EVA) copolymer. The composition B has preferably been obtained beforehand by processing a composition including from 10 to 49% of at least one propylene polymer (PB), from 90 to 51% by weight of at least one ethylene-vinyl acetate copolymer, and from 100 to 1500 ppm by weight of at least one crosslinking agent. This composition makes it possible especially to manufacture foam sheets which can be employed in the motor vehicle industry, which are thermoformable, HF weldable and recyclable.

Abstract: Compositions based on propylene polymer, ethylene-vinyl acetate copolymer and organic peroxide, characterized in that they include, by weight:a) 10 to 49% of at least one propylene polymer;b) 90 to 51% of at least one ethylene-vinyl acetate copolymer in which the vinyl acetate content is from 12 to 40% by weight;c) between 50 and 1000 ppm (parts per million) of at least one organic peroxide. The sheets obtained by extrusion of these compositions can be employed for the internal trim in the motor vehicle industry.