Production & Quality
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Glass Fibre repeated processing performance decay
Problembeschreibung
Glass Fibre after 3-4 times recycling and reprocessing, tensile strength drops 25-30%
Ursachenanalyse
Molecular chains break and degrade under repeated high-temperature shear; antioxidant exhausted in multiple processing; thermo-mechanical degradation cumulative effect
Lösung
1) Recycled material ratio not exceeding 20-30%; 2) supplement 0.1-0.2wt% antioxidant at each re-extrusion; 3) reduce processing temperature 5-10°C; 4) reduce screw speed to reduce shear
Wichtigste Erkenntnis
Multiple processing performance decay is caused by thermo-mechanical degradation; limiting regrind and supplementing antioxidant are key
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