Material Analysis
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Performance decline after the use of PLA recycled material
Problembeschreibung
After adding recycled material, the impact strength and transparency of PLA products drop significantly.
Ursachenanalyse
PLA is sensitive to heat history, and the molecular weight decreases after multiple processing; the lactic acid produced by degradation lowers the pH value and catalyzes further degradation.
Lösung
Control the recycled material ratio ≤20%; fully dry the recycled material; add a chain extender to restore the molecular weight.
Wichtigste Erkenntnis
PLA is sensitive to heat history, and recycling management is particularly important.
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