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US 6,294,115 B1Granted
Microcellular articles and methods of their production
AssigneeTrexel, Inc.
InventorsKent Blizard, Kelvin T. Okamoto, Jere R. Anderson
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Abstract
Semi-crystalline microcellular foams that include a midlevel amount of nucleating agent, and methods of their production, are provided. The microcellular foams can be produced in typical polymer processing techniques such as extrusion, injection molding and blow molding. The foams exhibit excellent mechanical properties and can be formed over a broad range of density into a number of different foam articles.
Claims26
A method of forming a microcellular article comprising:
- conveying polymeric material in a downstream direction in a polymer processing apparatus, the polymeric material comprising a semi-crystalline polymer, and a nucleating agent in an amount between about 2.5 and about 7 weight percent, by weight of the polymeric material;
- and a blowing agent;
- and
- forming a microcellular article from the polymeric material.
1 more element
Dependencies are inferred from the claim text.