Polyethylene-based resin foamed blow molded article
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United States of America Patent
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Issued Date -
Nov 4, 2010
app pub date -
Apr 28, 2010
filing date -
May 1, 2009
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Abandoned
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Abstract
A polyethylene resin foamed blow molded article obtained by extruding a foamable resin melt to form a foamed parison, subsequently inserting the foamed parison in a mold, and blow molding the foamed parison, the foamed blow molded article having a foam layer having an apparent density of 0.1 g/cm.sup.3 or more to less than 0.7-g/cm.sup.3, wherein the resin composing the foam layer is: a polyethylene resin having a density of 0.935-g/cm.sup.3 or more, a melt tension of 0.7-cN or more at 190.degree. C., a melt flow rate (MFR) of 1 g/10 min or more as measured at 190.degree. C. under a load of 2.16-kg, and an one-quarter isothermal crystallization time of 40 seconds or longer, which is defined as the time required that an exothermic calorific value due to isothermal crystallization by measurement condition (I) becomes equal to one-quarter of a total endothermic calorific value by measurement condition (II).
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