Abstract: Fiber-reinforced semi-finished articles made of thermoplastics of medium to high viscosity and a process for their production. To produce a fiber-reinforced composite material, a multiplicity of continuous filaments having single-filament diameters of 7 to 30 micrometers are arranged in parallel in the form of a band and tensioned, and the filament band is wetted by a thermoplastic polymer melt in a melt pultrusion process. In this process, the filament band is pulled over at least two heated spreader surfaces. The viscosity of the melt, measured at low shearing rates, is 105 to 2500 Pa·s. The tension upon entering the first spreader surface is 5 N to 50 N per 4000 single filaments, and the speed of the filament band is at least 3 m/min.

Abstract: To prepare a glass fiber-reinforced composite material, a glass fiber strand is drawn through an agitated aqueous powder dispersion of a coupling agent over a deflection body, the water is removed, the powder is melted onto the glass fiber strand and the pretreated fiber strand is subsequently impregnated with polyolefins by means of melt pultrusion.

Abstract: To produce fiber-reinforced composites, a continuous fiber strand is pulled through an agitated aqueous thermoplastic powder dispersion via deflectors. Following removal of the water phase the thermoplastic powder is heated and melted onto the fibers. Finally the fiber strand is impregnated with a thermoplastic melt by melt pultrusion.

Abstract: In granules of fiber-reinforced thermoplastic material, a multiplicity of individual filaments of the reinforcing fiber (e.g. glass) are arranged in parallel in a matrix of the thermoplastic material (e.g. polypropylene). The fiber length corresponds to the granule length and is in the range from 3 mm to 8 mm. The melt viscosity of the thermoplastic material is above 100 Pa.s, the diameter of the granules (measured perpendicular to the fiber direction) is 1.7 to 5 mm and the ratio diameter:length of the granules is 0.4 to 1.66.

Abstract: An injection molding which is built up from a thermoplastic material and glass fibers where the glass fibers have a fiber length of at least 5 mm and are present in an amount of 2 to 8% by weight, based on the total weight of the glass fibers and thermoplastic material. The injection molding has an impact strength at 23.degree. C. of at least 170 kJ/m.sup.2 and an impact strength at -30.degree. C. of at least 140 kJ/m.sup.2. The injection molding material is distinguished by a significant improvement in its impact strength, together with an increased heat resistance compared with injection moldings of simple thermoplastic materials which are not reinforced with fibers.

Abstract: A thermoformable, fiber-reinforced composite material contains 5 to 70% by volume of unidirectionally aligned reinforcing fibers having individual filament diameters of 7 to 30 .mu.m, which are bonded by a matrix of a thermoplastic elastomer-modified polypropylene which essentially wets the entire surface of the individual filaments.The elastomer-modified polypropylene preferably consists of a mixture of polypropylene with thermoplastic ethylene-propylene-diene rubber (EPDM) and/or ethylenepropylene rubber (EPM). The reinforcing fibers preferably consist of glass.