An electrically conductive yarn for producing protective garments is described, wherein the yarn comprises: a first electrically conductive strand; a second strand different from the first strand and comprising fire-resistant synthetic fibres, wherein the first and second strands are coupled and twisted; the first strand comprises a core of a first metal and a coating of a second metal different from the first metal.

The present invention is a method for producing carbon fiber, characterized by using a carbon-fiber precursor produced from a polymer having a narrow molecular weight distribution and by applying only a small amount of a smoothing agent, composed of a specific component, to the carbon fiber surface immediately before winding of carbon fiber. According to the present invention, it is possible to stably produce carbon fiber, which has excellent dispersibility and do not deteriorate in quality and quality even when a sizing agent is not attached to the carbon fiber surface. In addition, the produced carbon fiber is suitable for use in a composite material which is produced by high-temperature processing using a thermoplastic resin.

The invention concerns a high performance polyethylene (HPPE) member comprising at least 5 wt-% of a radiopaque component, the HPPE member is biocompatible and the radiopaque component is a particulate at least partially arranged inside a HPPE filament of the HPPE member. Furthermore, the radiopaque component has a particle size of at most 1 m, preferably the radiopaque component has a particle size of at most 0.5 m. The invention also concerns a method of making the HPPE member and various medical devices and repair products comprising the HPPE member.

The invention concerns a high performance polyethylene (HPPE) member comprising at least 5 wt-% of a radiopaque component, the HPPE member is biocompatible and the radiopaque component is a particulate at least partially arranged inside a HPPE filament of the HPPE member. Furthermore, the radiopaque component has a particle size of at most 1 m, preferably the radiopaque component has a particle size if at most 0.5 m. The invention also concerns a method of making the HPPE member and various medical devices and repair products comprising the HPPE member.