Material Drying
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TPU Dehumidifying Drying Dew Point
Fenómeno del problema
TPU dried in an ordinary oven still has bubbles
Análisis de la causa
TPU absorbs moisture extremely fast and requires extremely low moisture content; an ordinary oven cannot achieve the required dehydration depth; when troubleshooting on site, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solución
TPU must use a dehumidifying dryer with dew point below -40°C; drying air volume matched to material quantity; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
TPU drying must use low-dew-point dehumidifying equipment; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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