PROCEDIMENTO PER LA PRODUZIONE DI POLIMERI ESPANSI IN MASSA FINEMENTE SUDDIVISA DI PARTICELLE MICRONIZZATE E PRODOTTO OTTENUTO

摘要

An expanded thermoplastic is described which comprises styrene polymers and specific polyolefins and is present in the form of microparticles which have specific longitudinal and lateral dimensions and are free of intact cells of the expanded plastic particles from which they were obtained, the individual microparticles being non-uniform in shape and their density being between approximately 85% and 100% of the density of the plastic before expansion. A process for producing the plastic particles is also described.