Production & Quality
8 visualizaciones
PETG product yellowing
Fenómeno del problema
PETG transparent products show a pale yellow tone, and transparency and visual quality decline.
Análisis de la causa
Processing temperature too high (over 260°C) causing thermal degradation and thermal oxidation, material residence time too long, antioxidant insufficient, too much regrind.
Solución
Strictly control temperature ≤250°C; shorten the molding cycle; add antioxidant formulation; control the regrind ratio ≤20%.
Conclusión clave
PETG yellowing is a manifestation of thermal degradation; temperature and time management is the key to prevention.
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!