17 Semi-worked plastic substances, in particular in the form of foils, plates, rods and profiles; plastics and plastic composite materials, in particular in connection with metals being semi-finished products; semi-finished products based on polyurethanes, polyamides, polyesters, polyvinyl and polydivinyl compounds, copolymers, derivatives and mixtures of the aforesaid substances, and based on silicones, and based on high molecular weight esters, in particular plates, blocks, pipes, foils, hoses, profiles and coatings; fiber reinforced thermoplastic sheets for use in the manufacture of parts and sub-components for the automotive industry, leisure activity applications, the industry and aerospace applications; unprocessed and semi-processed rubber, gutta-percha, gum, asbestos, mica and substitutes for all these materials; articles made of plastics or resins in extruded form for use in manufacture; packing, stopping and insulating materials; flexible pipes, tubes and hoses [not of metal]