Processing Machinery
7 visualizaciones
GPPS Regrind Use Discoloration
Fenómeno del problema
After using regrind, the product color turns yellow and brittleness increases.
Análisis de la causa
Accumulated heat history of regrind degrades and discolors PS; degradation also reduces molecular weight and affects strength.; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solución
①Control the regrind ratio; ②manage regrind separately; ③test color and performance; ④use regrind with caution for transparent parts.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
The discoloration and embrittlement problem of PS regrind is prominent; transparent products are recommended to use all virgin material.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!