To produce the polymer-powder slurry for injection moulding the thermoplastic polymers such as polypropylene (PP), high-density polyethylene (HDPE) and ethylene-vinyl acetate (EVA) were used. Independ on skeletal polymers, in every feedstock paraffin wax (PW) was used in the amount of 50% of binder. Application of PW gives the possibility using solvent debinding or thermal debinding in lower temperature. Then the open porosity into the injected samples reduces the time of thermal debinding of binders residue. Application of one type of skeletal polymer requires to use a long isothermal step. The use of a blend of skeletal polymers enables subsequent thermal degradation which consecutively removes skeletal polymers during the heating to the sintering temperature, to minimise the time of isothermal stops [1, 2]. The rheological properties of blends used as a binder and next feedstocks were investigated during mixing in the twin-screw extruder and capillary rheometer. This results gives the information about the possibility to produce feedstocks and then to their injection moulding. Thermal behaviour of samples was determined by differential scanning calorimetry and thermogravimetric analysis to obtain the information about the temperature of mixing the polymers and to propose the thermal debinding cycle [3]. The optimal sintering temperature was selected on the basis of dilatometry studies. The mechanical properties were measured on injected, debounded and next sintered samples in order to decide which feedstock allows obtaining a good quality of sinters.