Injection Molding
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Yellowing in PCTG '2079851475616104452
Problembeschreibung
The product color changes from transparent to yellow.
Ursachenanalyse
The processing temperature is too high, causing thermal degradation, the residence time is too long, the raw material is insufficiently dried, and too much regrind is used.
Lösung
Control the temperature ≤250°C; shorten the residence time; fully dry; control the regrind ≤25%.
Wichtigste Erkenntnis
PCTG yellowing is a signal of degradation.
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