METHODS FOR BLOW MOLDING SOLID-STATE CELLULAR THERMOPLASTIC ARTICLES
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Mar 14, 2013
filing date -
Mar 14, 2013
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Abstract
Methods for saturating a plurality of parisons simultaneously with a saturating gas are disclosed. The parisons may be saturated using a sealed elongated tube through which the parisons are transferred. Parisons may be stacked vertically or horizontally using modular trays, and then loaded into pressure vessels. Parisons may be saturated in individual pressure vessels which are re-pressurized at various intervals. The gas-saturated parisons can be re-heated and blow molded to provide cellular blow-molded articles.
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