Material Analysis
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PBAT gel particles and fish eyes
Fenómeno del problema
Gel particles and fish-eye defects appear on the surface of PBAT film, optical and barrier properties decrease, and the appearance is poor.
Análisis de la causa
Crosslinked gel or impurities in the raw material; poor compatibility between PBAT and filler causing agglomeration; insufficient screen precision; uneven plasticization temperature with local overheating degradation; recycled material mixed with degraded particles.
Solución
①Incoming inspection and screening of raw materials; ②increase screen precision and replace regularly; ③uniform control of plasticization temperature; ④separate management of recycled material; ⑤gel particle detection and rejection.
Conclusión clave
Raw material quality and compatibility are the key to PBAT gel particles; screen management is a low-cost defense line; the use of recycled material must be carefully evaluated.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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