The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 2015
Filed:
Sep. 12, 2011
Adam R. Pawloski, Lake Elmo, MN (US);
Jeffrey J. Cernohous, Hudson, WI (US);
Kent Kaske, Woodbury, MN (US);
Garrett Van Gorden, River Falls, WI (US);
Adam R. Pawloski, Lake Elmo, MN (US);
Jeffrey J. Cernohous, Hudson, WI (US);
Kent Kaske, Woodbury, MN (US);
Garrett Van Gorden, River Falls, WI (US);
Lifoam Industries, LLC, Hunt Valley, MD (US);
Abstract
The present invention enables the secondary expansion of lightweight foamed beads. The foamed beads are produced using a compound comprising a compostable or biobased polyester and a physical blowing agent as well as a chemical blowing agent. Secondary expansion can be used either to lower the density of the foamed bead further or to enable expansion of the beads during molding to promote fusion. The foam beads can be produced using conventional melt processing techniques, such as single and twin-screw extrusion processes.