Material Drying
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PETG regrind performance degradation
Problembeschreibung
After adding PETG crushed regrind, the impact strength and transparency of new products decrease significantly.
Ursachenanalyse
The regrind undergoes multiple thermal histories and molecular chains degrade, crushing produces dust, and increased moisture absorption increases hydrolytic degradation.
Lösung
Control the regrind ratio ≤30%; use after full drying; add antioxidant and stabilizer during pelletizing.
Wichtigste Erkenntnis
PETG reuse requires controlling the ratio and performing stabilization treatment.
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