Method of making impact-resistant modified thermoplastic materials

A method of making impact-resistant modified thermoplastic material, comprising the steps of:

• introducing a thermoplastic material at an entry point into a twin-screw extruder having two screws rotating in a same direction plasticizing the thermoplastic material in the extruder as the thermoplastic material is advanced to an anterior screw space;
• admixing to the thermoplastic material in the extruder at least one additive selected from the group consisting of impact-resistant modification agents, reinforcing agents and alloying agents, at a location in proximity of the anterior screw space sufficient to realize a proper mixture of the additive with the thermoplastic material while keeping a residence time of the additive in the extruder to a minimum, thereby producing an extrudate;
• and
• selectively conveying the extrudate to a pair of cylinders for further processing and to enable a continuous operation of the extruder.