Plastic injection molding process
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United States of America Patent
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Jun 14, 2011
Grant Date -
N/A
app pub date -
Aug 16, 2007
filing date -
Aug 16, 2007
priority date (Note) -
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Abstract
Plastic containers are injection molded of HDPE blow molding grade resin having a density of about 0.960 to 0.965 g/cc and a melt index of about 0.7 to 1.0 g/10 min. at injection temperatures of 570° F. to 670° F. and mold cavity pressures of 20,000 psig to 27,000 psig. Relatively thin walled, rigid, livestock feed containers can be manufactured using about 20% to 50% less material while retaining strength and durability comparable to containers molded of HDPE injection molding grade resins.
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