Post-weld annealing of thermoplastic welds
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United States of America Patent
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Feb 9, 1999
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app pub date -
Aug 22, 1996
filing date -
Jul 29, 1996
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Abstract
The present invention is a method for improving the strength and quality of thermoplastic welds by annealing the weld following its formation at a temperature of at least about 500.degree. F. (i.e., about 125.degree. F. below the melt) for about 20 minutes to control cooling of the weld.
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