Abstract: In a thermal decomposition extruder, a hopper has an upper end closed. A sidewall of the hopper is provided with an emission hole for emission of decomposition gas produced during thermal decomposition of a polymer, to the outside of the hopper.

Abstract: There is provided a melting kneading devolatilizing extruder in which the surface renewability of a molten raw material is improved. The melting kneading devolatilizing extruder of the invention includes at least one surface renewable screw segment each including a plurality of discs that are arrayed such that a phase angle E, which is a deviation angle between the discs around an axis of a screw, is 0°<E<90° within a surface renewal region, and the surface renewable screw segment includes a void portion between the discs so that the discs are arranged at intervals in a direction of the axis of the screw.

Abstract: A devolatilization performance prediction apparatus for a solution devolatilization process using a twin-screw extruder is described. The devolatilization performance prediction apparatus determines a flow state of the solution in the twin-screw extruder, simulates the solution devolatilization process based on the flow state, and predicts a performance of a devolatilization process conducted with the twin screw extruder based on the simulation.

Abstract: There is provided a melting kneading devolatilizing extruder in which the surface renewability of a molten raw material is improved. The melting kneading devolatilizing extruder of the invention includes at least one surface renewable screw segment each including a plurality of discs that are arrayed such that a phase angle E, which is a deviation angle between the discs around an axis of a screw, is 0°<E<90° within a surface renewal region, and the surface renewable screw segment includes a void portion between the discs so that the discs are arranged at intervals in a direction of the axis of the screw.

Abstract: A devolatilization performance prediction apparatus for a solution devolatilization process using a twin-screw extruder including a flow state computation means 101 for computationally determining information relating to the flow state of solution existing in a devolatilization region 600, or a target region, of a devolatilization process on a screw 200 conveying the solution of nonvolatile mass containing volatile mass according to the flow state of the solution 700 existing on the channel surface at the upstream side in the conveying direction of the screw channel, the solution 800 existing in the gap between the screw 200 and a barrel 100 and the solution 900 existing on the channel surface at the downstream side in the conveying direction of the screw channel, and a devolatilization performance prediction means 102 for predicting the devolatilization performance in the devolatilization process according to the information relating to the flow state computationally determined according to the flow state of