TECHNIQUE AND FACILITY FOR GENERATION OF POLYMER PARTICLES Russian patent published in 2012 - IPC C08J9/16 C08J9/04 C08J11/06 B29C44/34 

FIELD: generation of polymer particles.

SUBSTANCE: invention refers to the method and facility for generation of expanded or capable of expanding polymer particles. Expanded or capable of expanding polymer particles (10) are obtained from polymer melt (11) and recycle polymer melt (12). At least part of recycle polymer melt (12) is derived from recycle polymer particles containing expanding agent (5). Recycle polymer melt (12) is obtained at the stage of melting-down of recycle polymer particles containing expanding agent (5) in the side extruder (6) using the heating device (19). In this process the expanding agent is removed from the recycle polymer melt (12) in the degasser (13). After that the recycle polymer melt (12) and polymer melt (11) to which liquid expanding agent is added (2) are mixed into one polymer melt (24), dispersed and homogenized in the mixing device (7), and then is processed until expanded or capable of expanding polymer particles are obtained.

EFFECT: more efficient reutilization of polymer particles containing expanding agents, regardless of their size and form, for further preparation of polymer particles capable of expanding and having particle-size distribution conforming to desired technical specifications.

9 cl, 1 dwg