Material Drying
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PETG regrind performance degradation
Fenómeno del problema
After adding PETG crushed regrind, the impact strength and transparency of new products decrease significantly.
Análisis de la causa
The regrind undergoes multiple thermal histories and molecular chains degrade, crushing produces dust, and increased moisture absorption increases hydrolytic degradation.
Solución
Control the regrind ratio ≤30%; use after full drying; add antioxidant and stabilizer during pelletizing.
Conclusión clave
PETG reuse requires controlling the ratio and performing stabilization treatment.
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