High Density Hexene Copolymer Formolene® HP5221 is a high performance copolymer that is designed for the most demanding requirements of corrugated pipe applications. Formolene® HP5221 meets the requirements of the PPI third party certification program for use in AASHTO M 294 corrugated pipe. Applications: Highway Drainage Pipe, Agricultural Drainage Pipe and Storm Water Drainage Pipe Information provided by Formosa Plastics Corporation, USA |