Processing Machinery
7 visualizaciones
High acetaldehyde content in PET preforms
Fenómeno del problema
Acetaldehyde (AA) content in PET preforms exceeds the 3ppm standard, affecting bottled water taste and quality.
Análisis de la causa
Processing temperature too high causes PET thermal degradation producing acetaldehyde, material residence time too long, screw shear too strong.
Solución
Reduce processing temperature to 265-280°C; shorten residence time; use low-shear screws; select low-AA grade raw material; add acetaldehyde scavengers.
Conclusión clave
PET preform acetaldehyde content control is a key safety indicator for food packaging.
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!