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