Material Drying
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TPU Extrusion Degradation
Problembeschreibung
TPU extruded products discolor and have black specks, and degraded material is released periodically
Ursachenanalyse
Excessive residence time or excessive temperature during TPU extrusion causes degradation; degraded material accumulates in dead corners of the barrel and die; aromatic TPU degrades faster above 180℃ in the presence of moisture
Lösung
①Control extrusion temperature and residence time; ②regularly clean dead corners of the barrel and die; ③strictly dry aromatic TPU; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
TPU extrusion degradation management runs three lines in parallel: temperature, residence, and dead corners; aromatic grades are especially sensitive; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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