Abstract: A fiber guide that guides fibers in a fiber processing system. The fiber guide has a surface having apertures through which fibers can pass in a direction from an upstream side of the surface to a downstream side of the surface. The apertures include at least one pair of apertures adjacent to and spaced from one another. The inlet of the first aperture is offset from the inlet of the second aperture. The offset is in the direction in which the fibers pass from the upstream side of the surface to the downstream side of the surface. A distance (d1) between the inlet of the first aperture and the inlet of the second aperture is larger than a distance (d2) between the first aperture and the second aperture measured transverse to the direction in which the fibers can pass.

Abstract: A random mat material including fiber bundles, said fiber bundles including fibers having an average fiber length of 5 to 100 mm, and having an average number N of fibers in the fiber bundle that satisfies: 1.5 × 10 5 D 2 < N < 4.5 × 10 5 D 2 wherein D is the average diameter of fibers in the fiber bundle, expressed in micrometers, and the standard deviation SDN of the number of fibers in a fiber bundle satisfies: 1,000<SDN<6,000 wherein at an end of the fiber bundle, the number of the fibers in a fiber bundle becomes less from center to edge of the fiber bundle in a fiber direction.

Abstract: A composite strip which extends in a main direction between first and second ends and which comprises a main strip comprising first fibres embedded in a matrix. The first fibres are made of carbon, an electrically conducting material, and the matrix is made up of at least one polymer. The composite strip further comprises a junction layer formed of an electrically conducting junction material. The junction layer is placed on the main strip.

Abstract: An electrical heating device comprising a support and a heating layer made of carbon fibre composite on the support mid connected to an electrical power supply to warm the device. The heating layer has a volume which comprises an electrically conducting circuit part which extends along at least one continuous line, and an electrically non-conducting insulation part which fills the remainder of the volume of the heating layer.

Abstract: A random mat material including fiber bundles, said fiber bundles including fibers having an average fiber length of 5 to 100 mm, and having an average number N of fibers in the fiber bundle that satisfies: 1.5 × 10 5 D 2 < N < 4.5 × 10 5 D 2 wherein D is the average diameter of fibers in the fiber bundle, expressed in micrometers, and the standard deviation SDN of the number of fibers in a fiber bundle satisfies: 1,000<SDN<6,000 wherein at an end of the fiber bundle, the number of the fibers in a fiber bundle becomes less from center to edge of the fiber bundle in a fiber direction.

Abstract: A method for forming an electrical connection in a pipe for transporting a fluid. The pipe comprises an internal hollow tube and a heating layer comprising first fibers made of carbon. There are performed a groove-formation step in which a groove is formed in the heating layer, an interface-preparation step in which a junction layer is placed on the heating layer of the groove, and a placement step in which a connection strip comprising second fibers formed of a second electrically conducting material is wound on the junction layer.

Abstract: A composite strip which extends in a main direction between first and second ends and which comprises a main strip comprising first fibres embedded in a matrix. The first fibres are made of carbon, an electrically conducting material, and the matrix is made up of at least one polymer. The composite strip further comprises a junction layer formed of an electrically conducting junction material. The junction layer is placed on the main strip.

Abstract: A method for forming an electrical connection in a pipe for transporting a fluid. The pipe comprises an internal hollow tube and a heating layer comprising first fibres made of carbon. There are performed a groove-formation step in which a groove is formed in the heating layer, an interface-preparation step in which a junction layer is placed on the heating layer of the groove, and a placement step in which a connection strip comprising second fibres formed of a second electrically conducting material is wound on the junction layer.

Abstract: An electrical heating device comprising a support and a heating layer made of carbon fibre composite on the support mid connected to an electrical power supply to warm the device. The heating layer has a volume which comprises an electrically conducting circuit part which extends along at least one continuous line, and an electrically non-conducting insulation part which fills the remainder of the volume of the heating layer.

Abstract: The invention relates to the assembly of a tube (1) made from composite material and a tubular metal part (2) in order to produce pipes. The assembly process comprises:—inserting a portion of the metal part (2) into the composite material tube (1); and—radially deforming the metal part (2) to a plastic deformation range sufficient to cause elastic deformation of said composite material tube (1), in order to obtain a radial contact between the outer wall of the metal part (2) and the inner wall of the composite material tube (1).