Processing Machinery
7 visualizaciones
PCABS Discoloration and Yellowing
Fenómeno del problema
[Problem Phenomenon] PC/ABS products yellow with hue drift, and batches are unstable
Análisis de la causa
Excessive melt temperature and excessive residence time degrade the PC phase; regrind ratio fluctuates; color masterbatch has insufficient temperature resistance; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
Measure actual melt temperature and shorten residence time; fix the regrind ratio; select temperature-resistant color masterbatch; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Conclusión clave
For PC/ABS yellowing, check thermal history first, then regrind and color masterbatch; after confirming effectiveness, fix 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
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!