Processing Machinery
5 مشاهدة
High acetaldehyde content in PET preforms
ظاهرة المشكلة
Acetaldehyde (AA) content in PET preforms exceeds the 3ppm standard, affecting bottled water taste and quality.
تحليل الأسباب
Processing temperature too high causes PET thermal degradation producing acetaldehyde, material residence time too long, screw shear too strong.
الحل
Reduce processing temperature to 265-280°C; shorten residence time; use low-shear screws; select low-AA grade raw material; add acetaldehyde scavengers.
الخلاصة الأساسية
PET preform acetaldehyde content control is a key safety indicator for food packaging.
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!