Material Drying
9 مشاهدة
PET Preform Acetaldehyde (AA) Odor
ظاهرة المشكلة
After blowing, the bottle has an odor, affecting the taste of drinking water.
تحليل الأسباب
Acetaldehyde is produced by thermal degradation and hydrolysis during PET melt processing; excessive material temperature, too long residence, and high water content all increase AA generation.
الحل
①Control material temperature and residence time; ②fully dry to reduce hydrolysis; ③select a low-AA generation process; ④conduct AA content testing for beverage bottles.
الخلاصة الأساسية
Odor = degradation products; dual control of temperature and water.
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