Production of thermoplastic prepregs by the molten technology on UPP-100 unit with program control. The unit allows to produce thermoplastic glass prepreg on the basis of fabric (glass fibers) of the mark T-15(P)76, impregnated with the melt of powdery polysulphon PSK-1 with a given degree of filling of composite. The developed technology elimiinates application of solvents and reduces labor input of production 2–3 times in comparison with traditional way of manufacturing of prepregs on the basis of thermosetting materials.