TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The long fibers present as reinforcing fibers, are longer than 100 mm and shorter than 2000 mm. The reinforcing fibers comprise glass fibers. The glass fibers exhibit a circular cross-sectional surface and a filament diameter of 6-18 mu m, or a flat shape and non-circular cross-sectional surface, whose main cross-sectional axis exhibits a width of 6-40 mu m, and secondary cross-sectional axis exhibits a width of 3-20 mu m. The glass fibers comprise E-glass fibers, A-glass fibers, C-glass fibers, D-glass fibers, S-glass fibers and/or R-glass fibers.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The fibers are equipped with a suitable sizing system and an adhesion promoter or coupling agent system based on silane. The adhesion promoter comprises silane compounds of formula ((X-(CH2)q)k-Si-(O-CrH2r+1)4-k) (I), preferably 3-aminopropyltrimethoxysilane, aminobutyl-trimethoxysilane, 3-aminopropyltriethoxysilane, aminobutyl-triethoxysilane, 3-aminopropyl-tris-methoxy-ethoxysilane, 3-aminopropyl-methyl-diethoxysilane, N-methyl-2-aminoethyl-3-aminopropyltrimethoxysilane, N-methyl-2-aminoethyl-3-aminopropyl-methyl-dimethoxysilane, N-methyl-3-aminopropyltrimethoxysilane, 3-glycidyloxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyl trimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, Dynasilan Damo (RTM: N- beta -(aminoethyl)- gamma -aminopropyltrimethoxysilane), N- beta -(aminoethyl)- gamma -aminopropyltriethoxysilane, N- beta -(aminoethyl)- gamma -aminopropylmethyldimethoxysilane or N- beta -(aminoethyl)-N- beta -(aminoethyl)- gamma -aminopropyltrimethoxysilane. The silane compounds are used in an amount of 0.05-5 wt.% based on filler for surface coating.X = NH2, HO or oxiran-2-yl;q = 2-10, preferably 3-4;r = 1-5, preferably 1-2; andk = 1-3, preferably 1.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The core and the layer (B) are connected by gluing, welding, laminating, coating or calendering. The layer (B) is applied on the core by coating processes. The core is made of polyamide (PA) 6 and the layer (B) is made of PA 66, or the core is made of PA 6 and the layer (B) is made of PA 6, or the core is made of PA 66 and the layer (B) is made of PA 66, or the core is made of polybutylene terephthalate, and the layer (B) is made of polyethylene terephthalate, or the core is made of polypropylene and the layer (B) is made of PA 6. EXAMPLE - No suitable example given.