HIGH FLOW POLYPROPYLENE WITH EXCELLENT MECHANICAL PROPERTIES

摘要

Polymer composition of a propylene copolymer and a high density polyethylene, wherein said composition has a MFR2 of at least 25.0 g/10 min and said propylene copolymer has a xylene cold soluble content in the range of 7.0 to below 20.0 wt.-%; a comonomer content in the range of 3.0 to 12.0 wt.-%; a shear thinning index (SHI 0/50) of at least 7.5; wherein further the xylene cold soluble fraction of the propylene copolymer has a comonomer content in the range of 25.0 to 45.0 wt.-%.

主权项

1. A thin wall packaging article comprising a polymer composition having a melt flow rate MFR2 (230° C.) measured according to ISO 1133 of at least 25.0 g/10 min, the polymer composition comprising:
(a) a heterophastic propylene copolymer (HECO) having
(a1) a xylene cold soluble (XCS) content determined according to ISO 16152 (25° C.) in the range of 7.0 to below 20.0 wt.-%;(a2) a comonomer content in the range of 3.0 to 12.0 wt.-%;(a3) a shear thinning index (SHI 0/50) of at least 7.5;wherein further(a4) the xylene cold soluble (XCS) fraction of the heterophastic propylene copolymer (HECO) has a comonomer content in the range of 25.0 to 45.0 wt.-%; (b) a high density polyethylene (HDPE); and (c) optionally, up to 2 wt.-% of a polyolefine (PO) wherein the heterophastic propylene copolymer (HECO), the high density polyethylene (HPDE) and the optional polyolefin (PO) are the only polymer components in the polymer composition.