PROCESSES FOR PROVIDING CONTROLLED DENSITY ARTICLES

摘要

An extrusion process or providing controlled density articles that have integral skins formed thereon.

主权项

1. A process for providing controlled density articles, said process comprising:
i. providing an extruder having a predetermined die head attached thereto; ii. providing a predetermined polymer in the extruder; iii. extruding said polymer through said extruder; iv. simultaneously with extruding said polymer, providing a gas source wherein said gas source is connected directly to said extruder or die head; v. passing said extruded polymer through a forming device to periodically crimp said extruded polymer and form an extrudate consisting of individual particles.