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US 2012/0232175 A1Published application
Pet foam articles and related methods
AssigneeMuCell Extrusion, LLC
InventorsMark E. Lindenfelzer, Jere R. Anderson, Samuel E. Dix
Life of this patent
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Abstract
PET foam articles and methods of forming the same are described herein. Processing conditions may be controlled to form PET foam sheets having desirable characteristics.
Claims18
A method of processing PET foam sheet comprising:
- conveying a stream of PET polymeric material and blowing agent in an extruder, wherein the blowing agent is a mixture comprising carbon dioxide and nitrogen, wherein the ratio of carbon dioxide to nitrogen is between 4:1 and 1:1;
- extruding the stream;
- and
- forming a PET polymeric foam sheet.
1 more element
A PET foam article comprising:
- a PET foam having a density of less than 0.35 g/cm3, wherein the foam sheet has an average cell size of less than 150 microns and is substantially free of corrugation.
Dependencies are inferred from the claim text.