Material Drying
5 مشاهدة
PPO Over-Temperature Baking and Aging
ظاهرة المشكلة
During PPO drying, temperature is raised or time is extended in pursuit of speed, the raw material ages, turns yellow and loses toughness, and product performance deteriorates.
تحليل الأسباب
Over-temperature and long-time baking of PPO is strictly prohibited; excessive drying causes the material to age, turn yellow and lose toughness; inaccurate temperature control of drying equipment causes local overheating; excessively thick material piles are heated unevenly.
الحل
①Strictly dry according to the 90~120℃×4~6 hours specification; ②calibrate the temperature control of drying equipment; ③keep material layer thickness moderate to ensure uniformity; ④downgrade yellowed material.
الخلاصة الأساسية
Both insufficient and excessive PPO drying produce defects; standardized temperature and time is the only correct path; equipment temperature control accuracy needs regular calibration.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!