Material Drying
3 Aufrufe
HDPE injection molded product strength decline
Problembeschreibung
HDPE parts fail mechanical testing, with no appearance abnormality.
Ursachenanalyse
Too much regrind, thermal degradation, weld lines passing through stressed areas; or moisture-containing regrind causing internal micropores.
Lösung
①Control the regrind ratio; ②stabilize heat history; ③keep weld lines away from stressed areas; ④dry the regrind.
Wichtigste Erkenntnis
Strength decline with normal appearance = a material history problem.
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