the turning of one or more synchronized bobbins around the flat yarn that comes out directly from the extrusion thus obtaining a circular cross section cord for the further outfitting of the basic fabric for the manufacturing of the special fabric and especially the artificial grass this curving wrapping operation differs substantially from the twisting applied in the existing processes because the cord is formed by the curving of the strip or flat yarn coming from the extrusion and by helicoidal wrapping of the said strip or flat yarn with thread or threads of plastic material preferably polyamide c final winding of the yarn or cord obtained in the b stage for its sending to the final product outfitting plant this winding stage is the same as the one used in the existing processes as can easily be understood from the analysis of the improved process of the invention it has been possible to eliminate the b and c stages from the existing processes the stage b of the process of the invention is made by the system of the invention in a synchronized way with the extrusion stage a the system of the invention has two sections the first one consisting of an extrusion device.