EXPANDED POLYPROPYLENE BEADS, A PROCESS FOR PRODUCING EXPANDING POLYPROPYLENE BEADS, MOLDED ARTICLES FORMED FROM EXPANDED POLYPROPYLENE BEADS, AND A PROCESS FOR FORMING SUCH MOLDED ARTICLES

摘要

Expanded polypropylene beads comprising a polypropylene composition (C) having:a) a melt flow rate (MFR2) in the range from 1.5 to 15.0 g/10 min;b) a melting temperature (Tm) in the range from 135 to 158 °C; andc) a loss tangent (tan δ) in the range of 2.00 to 4.00wherein the polypropylene composition (C) comprises more than 90.0 wt.-%, of a long chain branched copolymer of propylene (c-PP) comprising up to 8.0 wt.-% of comonomer(s) selected from ethylene and C4 to C10 alpha olefins,a method for the preparation of said beads, in addition to a method of forming molded articles from said beads, and the molded articles obtained thereby.