Patent 11090848 was granted and assigned to Toray Plastics (America), Inc. on August, 2021 by the United States Patent and Trademark Office.
Described herein is a liquid injector for a barrel extruder as well as methods and processes of manufacturing irradiation crosslinked polypropylene foam. In some embodiments, this includes a liquid injection barrel element that is incorporated in an extruder barrel that includes at least one injection port, a temperature sensor well, and cooling channels.