Method of heat-treating packaged product and heat-treated packaged product
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United States of America Patent
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Issued Date -
May 19, 2005
app pub date -
Sep 3, 2004
filing date -
Mar 4, 2002
priority date (Note) -
Abandoned
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Abstract
A packaged product formed by enclosing a content material, such as food or beverage, sanitary products or medical products, within a packaging material including at least a layer of hydrophilic resin, is heat-treated with hot water for, e.g., boil sterilization or retort sterilization. The hot water is caused to contain a water-soluble compound in an amount substantially exceeding a level contained in tap water, whereby it becomes possible to suppress the opalescence of the packaging material causing inferior appearance or transparency and leading to a lowering in gas-barrier property, which has been problematic in the conventional boil or retort hot water treatment.
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