Apparatus and process for making a corrugation-free foam
AssigneeDart Container Corporation
InventorsWayne J. Myer, Blaine M. Kelley
Life of this patent
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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.
Claims6
1] 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 0.35 mm.
2] A thermoplastic foam according to claim 1 wherein the foam is corrugation-free.
3] thermoplastic foam according to claim 2 wherein the average cell size is 0.20 mm to 0.30 mm.
4] thermoplastic foam according to claim 3 wherein the average cell size is 0.20 mm to 0.25 mm.
5] 5 thermoplastic foam according to claim 4 wherein the density of the foam is 30 kg/m3 to 120 kg/m3.
6] thermoplastic foam according to claim 5 wherein the thickness of the foam is 1 mm to 5 mm.