HDPE Rotational Molding Grades

WCI HDPE Rotational Molding Grades are designed for large, hollow, and seamless parts requiring impact resistance, chemical stability, and durability. The grades provide uniform wall thickness, smooth surfaces, and long-term performance, even in outdoor and heavy-duty applications.

HDPE Rotational Molding Grades designed for rotational molding (rotomolding) are engineered to perform optimally under "low shear" conditions—unlike those used in injection molding or extrusion processes. These materials feature an optimized molecular weight distribution (MWD) and a controlled melt flow index (MFI).

Main Features of HDPE Rotational Molding Grades

Physical form: Powder Form

They are usually supplied as powders with controlled particle sizes (300–500 microns).

Melt Flow Index (MFI)

It has a low MFI (2 to 8 g/10min) due to its higher mechanical strength.

High mechanical and impact resistance

Excellent resistance to impact, environmental stress cracking (ESCR) and internal pressure (for water and chemical tanks)