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US 6,610,755 B2Granted
Apparatus and process for making a corrugation-free foam
AssigneeDart Container Corporation
InventorsWayne J. Myer, Blaine M. Kelley
Life of this patent
Estimating the term…
Abstract
A thermoplastic foam comprises a styrenic polymer and a blowing agent consisting of 100% carbon dioxide. The thermoplastic foam has no visible corrugations and an average cell size of 0.20 mm to 0.35 mm.
Claims5
A thermoplastic foam comprising:
- a styrenic polymer, and a blowing agent consisting of 100% carbon dioxide, wherein the thermoplastic foam has no visible corrugation and an average cell size of 0.20 mm to 0.30 mm.
Dependencies are inferred from the claim text.