HDPE. SCG™ HDPE is a high-density polyethylene resin produced by a bimodal process, a technology developed by Mitsui Chemicals Inc. of Japan. SCG HDPE H1000P is a natural, bimodal, high density polyethylene resin designed as a general base resin of lor mpound for pipe extrusion and stripe. SCG HDPE H1000PBL is a blue (no lighter than RAL