Material Analysis
13 مشاهدة
Utilization of PSU Shear-insensitive Characteristic
ظاهرة المشكلة
[Problem Phenomenon] Attempting to improve PSU flow by increasing shear rate; poor effect and shear heat damage
تحليل الأسباب
Unlike most polymers, PSU melt viscosity is relatively insensitive to shear; increasing speed and shear has limited help in reducing viscosity; low molecular orientation also makes product performance less affected by flow direction
الحل
Adjust flow mainly by temperature rather than shear; expand the process window along the temperature axis; use the low-orientation characteristic to simplify directional design; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
الخلاصة الأساسية
PSU is shear insensitive; raising temperature is the right way to reduce viscosity; speed increase yields little benefit; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence; Include this case in the defect archive as a reference for troubleshooting similar problems in the future
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!