NOVELTY - Producing liquid fuel from plastic waste materials comprises: shredding (202) waste plastic and feeding the plastic into an auger system hopper via a suction hose; allowing (204) the plastic to be pushed into a reactor extrusion machine by the auger system; melting (206) the plastic to gas form by gasification process inside the reactor extrusion machine; allowing (208) the gas to flow into a catalyst system; condensing (210) the gas flowing from catalyst system and converting the gas into liquid state; reheating the liquid in a re-boiler unit; and condensing the obtained gas into liquid.    USE - The method is useful for producing liquid fuel from plastic waste materials (claimed) including municipal and/or industrial wastes made of polyethylene, polypropylene and PVC.    ADVANTAGE - The method is capable of economically producing the liquid fuel from plastic waste materials in an eco-friendly manner.    DETAILED DESCRIPTION - Producing liquid fuel from plastic waste materials comprises: shredding (202) waste plastic and feeding the plastic into an auger system hopper via a suction hose; allowing (204) the plastic to be pushed into a reactor extrusion machine by the auger system; melting (206) the plastic to gas form by gasification process inside the reactor extrusion machine; allowing (208) the gas to flow into a catalyst system; condensing (210) the gas flowing from the catalyst system and converting the gas into liquid state; reheating the liquid in a re-boiler unit to obtain a gas after gasification; and condensing the obtained gas into liquid at a temperature of 300 degrees C to obtain the liquid transportation fuel. An INDEPENDENT CLAIM is included for a conversion system for producing liquid transportation fuel, comprising a reactor extrusion machine for gasification by melting waste plastic material, a hopper for pushing the waste plastic material into the reactor extrusion machine, a catalyst system connected to the reactor extrusion machine for receiving a gas obtained by the gasification process of reactor extrusion machine and reacting the gas with a catalyst to form liquid, a re-boiler unit for reheating the liquid obtained from the catalyst system to obtain gas, where the gas obtained from the re-boiler is condensed to obtain liquid transportation fuel.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart of a process for producing liquid fuel.    Shredding waste plastic and feeding the plastic (202)    Allowing the plastic to be pushed into a reactor extrusion machine (204)    Melting the plastic to gas form by gasification process inside the reactor extrusion machine (206)    Allowing the gas to flow into a catalyst system (208)    Condensing the gas flowing from catalyst system and converting the gas into liquid state . (210)