green high density plastic board direct factory-HDPE plastic MATERIAL SPECIFICATION FOR HIGH DENSITY . 2.1 The High Density Polyethylene (HDPE) Pipe shall be made from base polymer and shall nform to the requirements as specified in 1058 Part 2: 2005. 2.2 The base polymer shall be a single grade of polyethylene, PE 100 with a derived density greater than 0.93g/cm3 tested at . henan okay.com