Production & Quality
7 visualizações
PETG product yellowing
Fenómeno do problema
PETG transparent products show a pale yellow tone, and transparency and visual quality decline.
Análise das causas
Processing temperature too high (over 260°C) causing thermal degradation and thermal oxidation, material residence time too long, antioxidant insufficient, too much regrind.
Solução
Strictly control temperature ≤250°C; shorten the molding cycle; add antioxidant formulation; control the regrind ratio ≤20%.
Conclusão principal
PETG yellowing is a manifestation of thermal degradation; temperature and time management is the key to prevention.
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!