Processing Machinery
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PET gel particle and impurity control
Fenómeno del problema
PET sheet gel particles exceed the standard; high-end customers return goods
Análisis de la causa
Gel particles come from unmelted highly crystalline particles, degraded cross-linked matter and foreign impurities; filtration and plasticization jointly determine them; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
Increase the filter mesh and screen change frequency; ensure plasticization temperature; control raw material grade and regrind ratio; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Gel particles rely on a three-pronged approach of filtration, plasticization, and raw material; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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