Its three-screw low emission, for the preparation of thermoplastic polymer material

The present invention discloses the preparation of a three-screw and low emission of thermoplastic polymer material used; the three screw portion comprises a first pressure, a second pressure portion, the pressure of the third portion, fourth pressure portion, a fifth portion of the pressure ; the three-screw portion comprises a first pressure along a material flow direction, a second pressure portion, the pressure of the third portion, the at least two portions fourth pressure cycles to any combination of different areas, the non-combination area, and the circulation and non-combined then connected fifth pressure region portion. Three-screw of the present invention, the vacuum port aggregation by increasing the mass transfer area and the material of the melt pressure conduction volatile component, so that the most volatile components and is discharged effective extraction, to maximize the improvement in only a single vacuum extraction, the overflow screw extrusion process efficiency of volatile components, while maintaining the melt blending rationalization, reduce odor and TVOC content material after extrusion.