Invention Grant
- Patent Title: Deep drawn microcellularly foamed polymeric containers made via solid-state gas impregnation thermoforming
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Application No.: US14091100Application Date: 2013-11-26
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Publication No.: US09770854B2Publication Date: 2017-09-26
- Inventor: Gregory L. Branch
- Applicant: Dart Container Corporation
- Applicant Address: US MI Mason
- Assignee: Dart Container Corporation
- Current Assignee: Dart Container Corporation
- Current Assignee Address: US MI Mason
- Agency: McGarry Bair PC
- Main IPC: B29C44/06
- IPC: B29C44/06 ; B65D81/38 ; B29C44/34 ; B29C44/04 ; B29B11/14 ; C08J9/12

Abstract:
The present invention is directed to a deep draw microcellularly foamed polymeric container comprising a polymeric sidewall integrally connected to a polymeric base along a bottom edge. 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 (having average cell diameters ranging from about 5 to about 100 microns) surrounded by a smooth outer skin layer integrally connected therewith. The polymeric sidewall defines a container height and a top opening, wherein the top opening defines a top opening width, and wherein the polymeric base defines a container base width, and wherein the area defined by the top opening is greater than the area defined by the polymeric base, and wherein the ratio of the container height (h) to the top opening width (w) is greater than about 1:1 (h:w).
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