High-density polyethylene (HDPE) foams that are essentially free of residual chemical blowing agents and reaction-by-products of chemical blowing agent are provided. The HDPE foams can be either microcellular foams or conventional foams. She foams can be produced in extrusion, injection molding, and...http://www.google.fr/patents/US6376059?utm_source=gb-gplus-shareBrevet US6376059 - Polyethylene foams and methods of their production
Polyethylene foams and methods of their production
