APPARATUS AND METHODS FOR CROSS-LINKED CORRUGATED POLYETHYLENE PIPE
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United States of America Patent
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Issued Date -
Mar 19, 2009
app pub date -
Nov 21, 2007
filing date -
Nov 21, 2006
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Abandoned
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Abstract
A composition and method for a single or dual wall extruded and thermoformed pipe corrugated HDPE pipe composed of a thermoplastic HDPE that is subsequently cross-linked by introducing moisture. The typical thermoplastic HDPE utilized for blow molding to fabricate the corrugated pipe is cross-linked to enhance dimensional stability, stress crack resistance, impact, creep resistance, and stiffness. The method also may comprise obtaining the enhanced properties by cross-linking the already fabricated linear HDPE corrugated pipe. The cross-linked HDPE is produced using a silane processing method. A composition may comprise a high density polyethylene compound composed with about 1 to 15 percent of finely ground isotropic cross-linked polyethylene recycle.
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