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Deep drawn microcellularly foamed polymeric containers made via solid-state gas impregnation thermoforming

  • US 9,296,126 B2
  • Filed: 03/09/2010
  • Issued: 03/29/2016
  • Est. Priority Date: 05/17/2003
  • Status: Active Grant
First Claim
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1. A deep drawn microcellularly foamed polymeric container, comprising:

  • a polymeric sidewall integrally connected to a polymeric base along a bottom edge, wherein;

    the polymeric sidewall and base are contiguous with each other and define a shape of an open top container,the polymeric sidewall and base have a contiguous inner microcellular foam structure surrounded by a smooth, unfoamed outer-skin layer, each of the inner microcellular foam structure and the unfoamed outer-skin layer having a degree of crystallinity greater than zero but less than 19%, and wherein the outer skin layer'"'"'s degree of crystallinity is greater than the inner microcellular foamed structure'"'"'s degree of crystallinity,the polymeric sidewall defines a container height and a top opening, wherein the top opening defines a top opening width and has an area,the polymeric base defines a container base width and has an area,the top opening'"'"'s area is greater than the polymeric base'"'"'s area, andthe ratio of the container height (h) to the top opening width (w) is greater than about 1;

    1 (h;

    w).

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