with a rigid shaped body of a plurality of oriented , i . e ., stretched thermoplastic carriers in film , ribbon , monofil or fiber form , the plastic carriers are superposed and / or adjacently laminated and commonly pressed . in order to prevent a decrease in the favorable properties obtained by stretching of an individual plastic carrier during pressing , the stretched plastic carriers are coated with thermoplastic material on the sides getting into contact when superposed and / or adjacently laminated . the coating material has a crystallite melting temperature or a glass temperature lower than the plastic carriers . the thickness of two adjacent coating materials each is smaller than the thickness of a plastic carrier .